ORIGINAL_ARTICLE
Thermo-Economic Analysis of Applying Cooling System Using Fog on GE-F5 Gas Turbines (Case Study)
Presently, nearly 26,000 MW gas power plant and nearly 16,000 MW of combined cycle has been installed in the country. But their power output in summer reduces to a minimum, where most demand is required, compared to the winter season. The main reason for that is gas turbine dependence on the ambient air temperature. Since most of our country has warm and dry climates, cooling down the input air to the compressor by means of water evaporation is the simplest method.In this paper, attempts have been made to investigate the thermos-dynamical and economical behavior of fog system on four units of GE-F5 applied in Shahid Zanbagh power plant. The results show that application of this method, causes increase in mass flow rate of the air input and reduces consuming work of compressor, where power production increases by 2.64 MW and the required water for each unit is equal to 0.761 kg/s, also the payback time for this system was calculated to be less than 3 years.
http://jhmtr.journals.semnan.ac.ir/article_2455_3597dbc5a817ccb11f307eb94652a052.pdf
2017-10-01T11:23:20
2018-06-22T11:23:20
73
81
10.22075/jhmtr.2017.1613.1106
Simulation
Overall Efficiency
Net Present Value
Off-design Analysis
Evaporative Cooling
Seyed Mehdi
Arabi
sm.arabi@merc.ac.ir
true
1
Department of Energy, Material and Energy Research Center (MERC), Tehran, Iran
Department of Energy, Material and Energy Research Center (MERC), Tehran, Iran
Department of Energy, Material and Energy Research Center (MERC), Tehran, Iran
AUTHOR
Mohammad
Aminy
mohamedaminy@yahoo.co.uk
true
2
Department of Energy, Material and Energy Research Center (MERC), Tehran, Iran
Department of Energy, Material and Energy Research Center (MERC), Tehran, Iran
Department of Energy, Material and Energy Research Center (MERC), Tehran, Iran
LEAD_AUTHOR
Hossein
Ghadamian
h.ghadamian@merc.ac.ir
true
3
Department of Energy, Material and Energy Research Center (MERC), Tehran, Iran
Department of Energy, Material and Energy Research Center (MERC), Tehran, Iran
Department of Energy, Material and Energy Research Center (MERC), Tehran, Iran
AUTHOR
Hassan Ali
Ozgoli
a.ozgoli@irost.ir
true
4
Department of Mechanical Engineering, Iranian Research Organization for Science and Technology (IROST), Tehran, Iran
Department of Mechanical Engineering, Iranian Research Organization for Science and Technology (IROST), Tehran, Iran
Department of Mechanical Engineering, Iranian Research Organization for Science and Technology (IROST), Tehran, Iran
AUTHOR
Behzad
Ahmadi
b.ahmadi@merc.ac.ir
true
5
Department of Energy, Material and Energy Research Center (MERC), Tehran, Iran
Department of Energy, Material and Energy Research Center (MERC), Tehran, Iran
Department of Energy, Material and Energy Research Center (MERC), Tehran, Iran
AUTHOR
References
1
[1]. H.A. Ozgoli, H. Ghadamian, A.A. Hamidi, ‘‘Modeling SOFC & GT Integrated-Cycle Power System with Energy Consumption Minimizing Target to Improve Comprehensive cycle Performance (Applied in pulp and paper, case studied)’’, GSTF Journal of Engineering Technology (JET), 1(1), 1-6, (2014).
2
[2]. H. Ghadamian, A.A. Hamidi, H. Farzaneh, H.A. Ozgoli, ‘‘Thermo-economic analysis of absorption air cooling system for pressurized solid oxide fuel cell/gas turbine cycle’’, Journal of Renewable and Sustainable Energy, 4(4), 043115 1- 043115 13, (2012).
3
[3]. A.K. Mohapatra, ‘‘Comparative analysis of inlet air cooling techniques integrated to cooled gas turbine plant’’, Journal of the Energy Institute, 88(3), 344-358, (2015).
4
[4]. C.R. Cortes, D.E. Willems, ‘‘Gas turbine inlet air cooling techniques: an overview of current technologies’’, POWER-GEN, Las Vegas, Nevada, USA, (2003).
5
[5]. T. Wang, X. Li, V. Pinninti, ‘‘Simulation of mist transport for gas turbine inlet air cooling’’, Numerical Heat Transfer, Part A: Applications, 53(10), 1013-1036, (2008).
6
[6]. M. Ameri, H. Nabati, A. Keshtgar, ‘‘Gas turbine power augmentation using fog inlet air-cooling system’’, ASME 7th Biennial Conference on Engineering Systems Design and Analysis. American Society of Mechanical Engineers, 73-78, (2004).
7
[7]. M. Ameri, H.R. Shahbazian, M. Nabizadeh, ‘‘Comparison of evaporative inlet air cooling systems to enhance the gas turbine generated power’’, International Journal of Energy Research, 31(15), 1483-1503, (2007).
8
[8]. H.A. Ozgoli, H. Ghadamian, H. Farzaneh, ‘‘Energy efficiency improvement analysis considering environmental aspects in regard to biomass gasification PSOFC/GT Power Generation System’’, Procedia Environmental Sciences, 17, 831-841, (2013).
9
[9]. H.A. Ozgoli, H. Ghadamian, R. Roshandel, M. Moghadasi, ‘‘Alternative Biomass Fuels Consideration Exergy and Power Analysis for Hybrid System Includes PSOFC and GT Integration’’, Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 37(18), 1962-1970, (2015).
10
[10]. E.C. Wilcox, A.M. Trout, ‘‘Analysis of thrust augmentation of turbojet engines by water injection at compressor inlet including charts for calculating compression processes with water injection’’, NASA: National advisory committee for aeronautics, 97-116, (1951).
11
[11]. S. Sanaye, H. Rezazadeh, M. Aghazeynali, M. Samadi, D. Mehranian, M.K. Ahangaran, ‘‘Effects of inlet fogging and wet compression on gas turbine performance’’, ASME Turbo Expo 2006: Power for Land, Sea and Air, American Society of Mechanical Engineers, 769-776, (2006).
12
[12]. M.M. Alhazmy, R.K. Jassim, G.M. Zaki, ‘‘Performance enhancement of gas turbines by inlet air-cooling in hot and humid climates’’, International journal of energy research, 30(10), 777-797, (2006).
13
[13]. M. Bagnoli, M. Bianchi, F. Melino, A. Peretto, P.R. Spina, S. Ingistov, R.K. Bhargava, ‘‘Application of a Computational Code to Simulate Interstage Injection Effects on GE Frame 7EA Gas Turbine’’, Journal of Engineering for Gas Turbines and Power, 130(1), 012001 1-012001 10, (2008).
14
[14]. C. Yang, Z. Yang, R. Cai, ‘‘Analytical method for evaluation of gas turbine inlet air cooling in combined cycle power plant’’, Applied Energy, 86(6), 848-856, (2009).
15
[15]. M. Farzaneh-Gord, M. Deymi-Dashtebayaz, ‘‘A new approach for enhancing performance of a gas turbine (case study: Khangiran refinery)’’, Applied Energy, 86(12), 2750-2759, (2009).
16
[16]. G.M. Zaki, R.K. Jassim, M.M. Alhazmy, ‘‘Brayton refrigeration cycle for gas turbine inlet air cooling’’, International Journal of Energy Research, 31(13), 1292-1306, (2007).
17
[17]. R.K. Jassim, G.M. Zaki, M.M. Alhazmy, ‘‘Energy and exergy analysis of reverse Brayton refrigerator for Gas Turbine power boosting’’, International Journal of Exergy, 6(2), 143-165, (2009).
18
[18]. J.R. Khan, W.E. Lear, S.A. Sherif, J.F. Crittenden, ‘‘Performance of a novel combined cooling and power gas turbine with water harvesting’’, Journal of Engineering for Gas Turbines and Power, 130(4), 041702 1-041702 10, (2008).
19
[19]. D.C. Erickson, I. Kyung, G. Anand, E.E. Makar, ‘‘Aqua absorption turbine inlet cooler’’, ASME 2003 International Mechanical Engineering Congress and Exposition, American Society of Mechanical Engineers, 49-56, (2003).
20
[20]. D.C. Erickson, ‘‘Power Fogger Cycle’’, ASHRAE transactions, 111(2), 551-554, (2005).
21
[21]. R. Gareta, L.M. Romeo, A. Gil, ‘‘Methodology for the economic evaluation of gas turbine air cooling systems in combined cycle applications’’, Energy, 29(11), 1805-1818, (2004).
22
[22]. M. Chaker, C.B. Meher-Homji, T. Mee, A. Nicolson, ‘‘Inlet Fogging of Gas Turbine Engines: Detailed Climatic Analysis of Gas Turbine Evaporative Cooling Potential’’, ASME Turbo Expo 2001: Power for Land, Sea and Air, American Society of Mechanical Engineers, 1-16, (2001).
23
[23]. M.M. Alhazmy, Y.S.H. Najjar, ‘‘Augmentation of gas turbine performance using air coolers’’, Applied Thermal Engineering, 24(2), 415-429, (2004).
24
[24]. R.J. Dossat, T.J. Horan, ‘‘Principles of refrigeration’’, Prentice-Hall, (2002).
25
[25]. C.B. Meher-Homji, T.R. Mee, ‘‘Gas turbine power augmentation by fogging of inlet air’’, Proceedings of the 28th Turbomachinery Symposium, 93-114, (1999).
26
[26]. J.A. Sadri, P. Hooshmand, ‘‘Enhancing efficiency of combined cycle Gas Power Plant Using Fog’’, Journal of Basic and applied scientific Research, 2(1), 10-16, (2012).
27
[27]. Mee industries inc., ‘‘Gas turbine inlet air cooling and wet Compression’’, (2015).
28
A. Bhdashty, A.H. Ibrahim, F. Zabyhyan, ‘‘Increasing capacity of gas power plant cooling system by Fag in Zahedan, the twenty-first international conference on power in Iran’’, 21th International Power System Conference, (2006).
29
ORIGINAL_ARTICLE
Effect of baffle oientation on shell tube heat exchanger performance
In this paper, fluid flow and heat transfer in the laboratory (small size) shell tube heat exchanger are analysed by computational fluid dynamic software. In this type of shell tube heat exchanger baffles with different angles of rotation: 00 (horizontal segmental baffle), 150 (from horizontal), 300, 450, 600, 750, 900 (vertical segmental baffle) is used. Effect of baffle orientation on shell tube heat exchanger performance is investigated. The flow domain is meshed by three-dimensional tetrahedral elements. The obtained result has a good agreement with the analytical method (Bell method) and experimental data in the literature. By comparing the pressure drop, heat transfer and heat transfer versus pressure drop (Q/ P) at same flow rate, the shell tube heat exchanger with orientation of (900) have better performance than other angles of baffle orientation. decrease pressure drop 26%, 4.1%, 17.6%, 24.42%, 14% rather than 150, 300, 450 ,600,750 ,00 angle of orientation respectively. That show have better performance than other angles of baffle orientation. So by reducing pressure drop with maintaining heat transfer rate, the operating cost reducing that can be best choice among other models.
http://jhmtr.journals.semnan.ac.ir/article_2526_33dbf1a9d31a9be9b35b3cef13ed44a0.pdf
2017-10-01T11:23:20
2018-06-22T11:23:20
83
90
10.22075/jhmtr.2017.1577.1104
shell tube heat exchanger
Baffle
Pressure drop
Heat transfer
Hamed
Uosofvand
mr.uosofvand@gmail.com
true
1
Department of Mechanical Engineering.University of Kashan, Kashan, Iran
Department of Mechanical Engineering.University of Kashan, Kashan, Iran
Department of Mechanical Engineering.University of Kashan, Kashan, Iran
LEAD_AUTHOR
Ali Akbar
Abbasian Arani
abbasianarani@yahoo.com
true
2
Department o Mechanical Engineering, University of Kashan, Kashan, Iran
Department o Mechanical Engineering, University of Kashan, Kashan, Iran
Department o Mechanical Engineering, University of Kashan, Kashan, Iran
AUTHOR
Ali
Arefmanesh
arefmanesh@kashanu.ac.ir
true
3
kashan
kashan
kashan
AUTHOR
References
1
[1]. Shah, R. K., & Secular, D. P. ‘‘Fundamentals of heat exchanger design’’, John Wiley &Soz, (2003).
2
[2]. Kakaç S, Liu HT. Heat exchangers: Selection, rating and thermal design, CRC Press, (1997).
3
[3]. J.-F. Zhang, B. Li, W.-J. Huang, Y.-G. Lei, Y.-L. He, W.-Q. Tao, ‘‘Experimental Performance Comparison of Shell-Side Heat Transfer for Shell-and-Tube Heat Exchangers with Middle-Overlapped Helical Baffles and Segmental Baffles’’, Chemical Engineering Science, 64, 1643-53, (2009).
4
[4]. M. Thirumarimurugan, T. Kannadasan, E. Ramasamy, “Performance analysis of shell and tube heat exchanger using miscible system,” American Journal of Applied Sciences, 5(5), 548-552, (2008).
5
[5]. K.S. Rao, ‘‘Analysis of flow maldistribution in tubular heat exchangers by fluent,” National Institute of Technology Rourkela, (2007).
6
[6]. B.I. Master, K.S. Chunangad, V. Pushpanathan, ‘‘Fouling mitigation using helixchanger heat exchangers’’, Engineering Conferences International, 366 (1Vol), (2003).
7
[7]. M. Salimpour, Heat transfer coefficients of shell and coiled tube heat exchangers, Experimental Thermal and Fluid Science, 33(2), 203-207, (2009)
8
[8]. Y.A. Kara, Ö. Güraras, ‘‘A computer program for designing of shell-and-tube heat exchangers’’, Applied Thermal Engineering, 24(13), 1797-1805, (2004).
9
[9]. U. Ur Rehman, ‘‘Heat transfer optimization of shell-and-tube heat exchanger through CFD Studies’’, Master thesis, Chalmers University of Technology, (2012).
10
[10]. J.-F. Zhang, Y.-L. He, W.-Q. Tao, ‘‘A design and rating method for shell-and-tube heat exchangers with helical baffles’’, Journal of Heat Transfer, 132(5), 051802-051802, (2010).
11
[11]. E. Ozden, I. Tari, ‘‘Shell side CFD analysis of a small shell-and-tube heat exchanger,’’ Energy Conversion and Management, 51(5), 1004-1014, 5//, (2010).
12
[12]. K.T.R. Raj, S. Ganne, ‘‘Shell side numerical analysis of a shell and tube heat exchanger considering the effects of baffle inclination angle on fluid flow using CFD’’, Thermal Science, 16(4), 1165-1174, (2012).
13
[13]. S. Ji, W.-j. Du, P. Wang et al., ‘‘Numerical Investigation on Double Shell-Pass Shell-and-Tube Heat Exchanger with Continuous Helical Baffles’’, Journal of Thermodynamics, 2011, 7, (2011).
14
[14]. Q. Wang, Q. Chen, G. Chen et al., ‘‘Numerical investigation on combined multiple shell-pass shell-and-tube heat exchanger with continuous helical baffles,’’ International Journal of Heat and Mass Transfer, 52(5), 1214-1222, (2009).
15
[15]. J.-F. Zhang, Y.-L. He, W.-Q. Tao, ‘‘3D numerical simulation on shell-and-tube heat exchangers with middle-overlapped helical baffles and continuous baffles – Part I: Numerical model and results of whole heat exchanger with middle-overlapped helical baffles,’’ International Journal of Heat and Mass Transfer, 52(23–24), 5371-5380, 11//, (2009).
16
[16]. J.-F. Zhang, Y.-L. He, and W.-Q. Tao, ‘‘3D numerical simulation on shell-and-tube heat exchangers with middle-overlapped helical baffles and continuous baffles–Part II: Simulation results of periodic model and comparison between continuous and noncontinuous helical baffles,’’ International Journal of Heat and Mass Transfer, 52(23), 5381-5389, (2009).
17
[17]. F. Nemati Taher, S. Zeyninejad Movassag, K. Razmi et al., ‘‘Baffle space impact on the performance of helical baffle shell and tube heat exchangers’’, Applied Thermal Engineering, 44, 143-149, 11//, (2012).
18
[18]. M. Zhang, F. Meng, Z. Geng, CFD simulation on shell-and-tube heat exchangers with small-angle helical baffles, Front. Chem. Sci. Eng., 9, 2, 183-193, 2015-07-14, (2015).
19
[19]. W. Jian, Y. Huizhu, S. Wang et al., “Numerical investigation on baffle configuration improvement of the heat exchanger with helical baffles,” Energy Conversion and Management, 89, 438-448, (2015).
20
Fluent help 6.3.26 user’s guide, FLUENT Inc, 2006, section 25. 4. 3
21
ORIGINAL_ARTICLE
Unsteady boundary layer flow of a Casson fluid past a wedge with wall slip velocity
In this paper an analysis is presented to understand the effect of non–Newtonian rheology, velocity slip at the boundary, thermal radiation, heat absorption/generation and first order chemical reaction on unsteady MHD mixed convective heat and mass transfer of Casson fluid past a wedge in the presence of a transverse magnetic field with variable electrical conductivity. The partial differential equations governing the flow with the pertinent boundary conditions are solved numerically. The computational results are presented graphically for different values of the non-dimensional parameters occurred in the analysis. The results for particular cases are compared with the published results available in literature and are found to be in excellent agreement. Present analysis indicates that the Casson parameter representing the non-Newtonian rheology has an increasing influence on velocity and temperature. The point of flow separation is found for negative values of wedge angle parameter. The radiation parameter enhances the rate of heat transfer. The mass transfer rate is reduced with chemical reaction parameter and Schmidt’s number.
http://jhmtr.journals.semnan.ac.ir/article_2527_76c539f3512e5821cb4f8702e60fa0af.pdf
2017-10-01T11:23:20
2018-06-22T11:23:20
91
102
10.22075/jhmtr.2017.1647.1110
Casson fluid
Heat and mass transfer
Unsteady wedge flow
Chemical reaction
G
Sarojamma
gsarojamma@gmail.com
true
1
Sri Padmavati Mahila Visvavidyalayam
Sri Padmavati Mahila Visvavidyalayam
Sri Padmavati Mahila Visvavidyalayam
LEAD_AUTHOR
K
Sreelakshmi
katasreelakshmi@gmail.com
true
2
Sri Padmavati Mahila Visvavidyalayam
Sri Padmavati Mahila Visvavidyalayam
Sri Padmavati Mahila Visvavidyalayam
AUTHOR
B
Vasundhara
vasu.bhumarapu@gmail.com
true
3
Sri Padmavati Mahila Visvavidyalayam
Sri Padmavati Mahila Visvavidyalayam
Sri Padmavati Mahila Visvavidyalayam
AUTHOR
References
1
[1]. Z. Uddin, M. Kumar, S. Harmand, “Influence of thermal radiation and heat generation/absorption on MHD heat transfe flow of a Micropolar fluid past a wedhe with Hall and ion slip currents”, Thermal Science, 18, 489–502, (2014).
2
[2]. K. Vajravelu, Swati Mukhopadhya, Fluid flow, heat and mass transfer at bodies of different shapes: Numerical solutions, Academic Press, (2015).
3
[3]. M.M. Rahman, I.A. Eltayeb, “Convective slip flow of rarefied fluids over a wedge with thermal jump and variable transport propertie”, International journal of Thermal Sciences, 50, 468–479, (2011).
4
[4]. P.J. Singh, S. Roy, R. Ravindran, “Unsteady mixed convection flow over a vertical wedge”, International Journal of Heat and Mass Transfer, 52, 415–421, (2008).
5
[5]. V.M. Falkner, S.W. Skan, “Solutions of the boundary-layer equations”, Philosophical Magazine, 7 (12), 865–896, (1931).
6
[6]. D.R. Hartee, “On an equation occurring in Falkner and Skan’s approximate treatment of the equations of the boundary layer”, Proceedings of the Cambridge Philosophical Society, 33, 223–239, (1937).
7
[7]. K.A. Yih, “MHD Forced Convection Flow Adjacent to a Non – Isothermal Wedge”, International Communication Heat Mass Transfer, 26(6), 819–827, (1999).
8
[8]. A.J. Chamka, “MHD Flow of a Uniformly Stretched Vertical Permeable surface in the presence of heat generation/absorption and a chemical reaction”, International Communication Heat Mass Transfer, 30, 413–422, (2003).
9
[9]. S.P. Anjali Devi, R. Kandaswamy, “Effects of heat and mass transfer on MHD laminary boundary layer flow over a wedge with suction or injection”, Journal of Energy Heat and Mass Transfer, 23, 167–178, (2001).
10
[10]. R. Kandasamy, B. Abd. Wahid, Md. Raj, A.B. Khamis, “Effects of chemical reaction, heat and mass transfer on boundary layer flow over a porous wedge with heat radiation in the presence of suction or injection”, Theoretical Applied Mechanics, 33 (2), 123–148, (2006).
11
[11]. M. Ganapathirao, R. Ravindran, I. Pop, “Non-uniform slot suction (injection) on an unsteady mixed convection flow over a vertical wedge with chemical reaction and heat generation”, International Communication in Heat and Mass transfer, 67, 1054–1061, (2013).
12
[12]. R. Ahmad, W.A. Khan, “Numerical Study of Heat and Mass Transfer MHD Viscous Flow Over a Moving Wedge in the Presence of Viscous Dissipation and Heat Source/Sink with Convective Boundary Condition”, Heat Transfer–Asian Research, 43(1), 17–31, (2014).
13
[13]. M. Keimanesha, M.M. Rashidi, A.J. Chamkha, R. Jafari, “Study of a third grade non-Newtonian fluid flow between two parallel plates using the multi-step differential transform method”, Computers and Mathematics with Applications, 62, 2871–2891, (2011).
14
[14]. K.R. Rajagopal, A.S. Gupta, T.Y. Na, “A note on the Falkner – Skan flows of a Non –Newtonian fluid”, 18(4), 313–320, (1983).
15
[15]. F.M. Hady, and I.A. Hassanien “Effect of a transverse magnetic field and porosity of the Falkner- Skan flow of a Non – Newtonian fluid”, Astrophysics Space Science, 112, 381–391, (1985).
16
[16]. M.M. Rashidi, M.T. Rastegari, M. Asadi, O. Anwar Beg, “A study of non-Newtonian flow and heat transfer over a non-isothermal wedge using the homotopy analysis method”, Chem. Eng. Comm., 199, 231–256, (2012).
17
[17]. M.S. Alam, S.M.C. Hossain, “A new similarity approach for an unsteady two-dimensional forced convective flow of a micropolar fluid along a wedge”, International Journal of Applied Mathematics and Mechanics, 9 (14), 75– 89, (2013).
18
[18]. B. Rostami, N. M. Rashidi, P. Rostami, E. Momoniat, N. Freidoonimehr, “Analytical Investigation of Laminar Viscoelastic Fluid Flow over a Wedge in the Presence of Buoyancy Force Effects”, Article ID 496254, 11, (2014).
19
[19]. N. Casson, “A flow equation for pigment oil suspensions of printing ink type. In Rheology of Dispersed Systed”, (Edited by C.C. Mill), Pergamon Press, Oxford, 84–102, (1959).
20
[20]. G.V. Vinogradov, A.Y. Malkin, “Rheology of polymers”, Mir Publisher, Moscow, (1979).
21
[21]. W.P. Walwander, T.Y. Chen, D.F. Cala, “An approximate Casson fluid model for tube flow of blood”, Biorheology, 12, 111–119, (1975).
22
[22]. S. E. Charm, G.S. Kurland, “Viscometry of human blood for shear rates of 0-100,000 ”, Nature, 206, 617–618, (1965).
23
[23]. E.W. Merrill, G.A. Pelletier, “Viscosity of human blood: Transition from Newtonian to non-Newtonian”, Jour. Appl. Physiol., 33, 178, (1967).
24
[24]. Swati Mukhopadhyay, Iswar Chandra Mondal, Ali J. Chamka, “Casson fluid flow and heat transfer past a symmetric wedge”, Wiley Periodical Inc. Heat Transfer Asian Research, 42 (8), 665–675, (2013).
25
[25]. S. Mukhopadhyay, I.C. Mandal, “Boundary layer flow and heat transfer of a Casson fluid past a symmetric porous wedge with surface heat flux”, Chinese Physics B, 23, 1–6, (2014).
26
[26]. N.T.M. Eldabe, M.G.E. Salwa, “Heat transfer of MHD non – Newtonian Casson fluid flow between two rotating cylinders”, J. Phys. Soc. Japan, 64, 41–64, (1995).
27
[27]. D. Pal, H. Mondal, “MHD non–Darcy mixed convective diffusion of species over a stretching sheet embedded in a porous medium with non–uniform heat source/sink, variable viscosity and Soret effect”, Commun Nonlinear Sci Numer Simulat., 17, 672–684, (2012).
28
[28]. N.G. Kafoussias, N.D. Nanousis, “Magnetohydrodynamic laminar boundary layer flows over a wedge with suction or injection”, Can. J.Phys., 75, 733–741, (1997).
29
[29]. M.M. Rashidi, M. Keimanesh, “Using differential transform method and Pade approximant for solving MHD flow in a lamina liquid film from a horizontal stretching surface”, Mathematical Problems in Engineering, 01, 1–14, (2010).
30
[30]. F.M. White, “Viscous Fluid Flows”, Third ed. McGraw-Hill, New York (2006).
31
[31]. I. Muhaimin, R. Kandasamy, I. Hashim, “Thermophoresis and chemical reaction effects on MHD mixed convective heat and mass transfer past a porous wedge with variable viscosity in the presence of viscous dissipation”, International Journal for Computational Methods in Engineering Science and Mechanics, 10, 231–240, (2009a).
32
I. Muhaimin, R. Kandasamy, A.B. Kamis, “Thermophoresis and chemical reaction effects on non – Darcy MHD mixed convective heat and mass transfer past a porous wedge in the presence of variable stream function”, Chemical Engineering Research and Design, 87, 1527–1535, (2009b)
33
ORIGINAL_ARTICLE
Fluid flow and heat transfer characteristics in a curved rectangular duct using Al2O3-water nanofluid
In the present research, the laminar forced convective heat transfer and fluid flow characteristics for Al2O3-water nanofluid flowing in different bend (i.e., 180o and 90o) pipes have been investigated numerically in a three-dimensional computational domain using the finite volume technique. The effects of different pertinent parameters, such as the Reynolds number of the duct, volume fraction of the nanoparticle, the diameter of the nanoparticle, aspect ratio of the duct and the duct bend angle on the hydrodynamic and thermal characteristics of the flow has been presented. It is observed that the heat transfer is augmented by replacing conventional fluid by Al2O3-water nanofluid. The nanoparticle volume fraction is found to be an important parameter to increase the heat transfer in the bend pipe. It is also observed that the thermo-hydraulic characteristics of the flow changes with the duct aspect ratio, and the heat transfer rate is improved with aspect ratio. The heat transfer with a 180o bend pipe is obtained to be higher than a 90o bend pipe at a particular value of volume fraction and Reynolds number. Moreover, the present computed Nusselt number for 180o bend pipe of rectangular cross-section has been validated with the existing literature. validated with the existing literature.
http://jhmtr.journals.semnan.ac.ir/article_2606_938e0ba6023b9ca3b2d86e37aeb4993b.pdf
2017-10-01T11:23:20
2018-06-22T11:23:20
103
115
10.22075/jhmtr.2017.1689.1115
Nanofluid
forced convection
180o return bend pipe
Aspect Ratio
Ashok
Barik
ashokbarik.mech@gmail.com
true
1
College of Engineering and Technology, Bhubaneswar, India
College of Engineering and Technology, Bhubaneswar, India
College of Engineering and Technology, Bhubaneswar, India
LEAD_AUTHOR
Binodini
Nayak
akbarik@cet.edu.in
true
2
College of Engineering and Technology, Bhubaneswar, India
College of Engineering and Technology, Bhubaneswar, India
College of Engineering and Technology, Bhubaneswar, India
AUTHOR
References
1
[1]. A. Bejan, S. Lorente, “Thermodynamic optimization of flow geometry in mechanical and civil engineering”, Journal of Non-Equilibrium Thermodynamics, 26, 305-354, (2001).
2
[2]. Z. Li, S.C. Mantel, J.H. Davidson, “Mechanical analysis of streamlined tubes with non-uniform wall thickness for heat exchangers”, The Journal of Strain Analysis for Engineering Design, 40, 275-285, (2005).
3
[3]. H. Najafi, B. Najafi, “Multi-objective optimization of a plate and frame heat exchanger via genetic algorithm”, Heat Mass Transfer, 46, 639-647, (2000).
4
[4]. K.V. Liu, S.U.S. Choi, K.E. Kasza, “Measurement of pressure drop and heat transfer in turbulent pipe flows of particulate slurries”, Argonne National Laboratory Report, ANL-88-15, (1998).
5
[5]. C.W. Sohn, M.M. Chen, “Microconvective thermal conductivity in dispersed two-phase mixture as observed in low velocity Couette flow experiment’’, ASME Journal of Heat Transfer, 103, 47-51, (1981).
6
[6]. M.C. Roco, C.A. Shook, “Modelling of slurry flow: the effect of particle size’’, The Canadian Journal of Chemical Engineering, 61, 494-503, (1983).
7
[7]. A.S. Ahuja, “Augmentation of heat transfer in laminar flow of polystyrene suspension”, Journal of Applied Physics, 46, 3408-3425, (1975).
8
[8]. S.U.S. Choi, Z.G. Zhang, W. Yu, F.E. Lookwood, E.A. Grulke, “Anomalously thermal conductivity enhancement in nanotube suspension”, Applied Physics Letters, 79, 2252-2254, (2001).
9
[9]. Y. Xuan, Q. Li, ‘‘Heat transfer enhancement with nanofluids”, International Journal of Heat and Fluid Flow, 21, 58-64, (2000).
10
[10]. X. Wang, A.S. Mujumdar, “Heat transfer characteristics of nanofluids: a review”, International Journal of Thermal Sciences, 46, 1-19, (2007).
11
[11]. S. Kakaç, A. Pramuanjaroenkij, ‘‘Review of convective heat transfer enhancement with nanofluids”, International Journal of Heat and Mass Transfer, 52, 3187-3196, (2009).
12
[12]. S.Z. Heris, M.N. Esfahany, S.G. Etemad, ‘‘Experimental investigation of convective heat transfer of Al2O3/water nanofluid in circular tube”, International Journal of Heat and Mass Transfer, 28, 203-210, (2007).
13
[13]. S.Z. Heris, S. G. Etemad, S. G., M.N. Esfahany, ‘‘Experimental investigation of oxide nanofluids laminar flow convective heat transfer’’, International Communication of Heat and Mass Transfer, 33, 529-535, (2006).
14
[14]. K.B. Anoop, T. Sunderrajan, S.K. Das, “Effect of particle size on convective heat transfer in nanofluids in developing region”, International Journal of Heat and Mass Transfer, 52, 2189-2195, (2009).
15
[15]. C.T. Nguyen, G. Roy, C. Gauthier, N. Galanis, “Heat transfer enhancement using Al2O3-water nanofluid for an electronic liquid cooling system”, Applied Thermal Engineering, 27, 1501-1506, (2007).
16
[16]. S.K. Das, N. Putra, P. Thiesen, W. Roetzel, ‘‘Temperature dependence of thermal conductivity enhancement for nanofluids”, ASME Journal of Heat Transfer,125, 567-574, (2003).
17
[17]. J.C. Maxwell, ‘‘A Treatise on Electricity and Magnetism.’’ vol. 1, Second ed., Clarendon Press, Oxford, UK, (1881).
18
[18]. R.L. Hamilton, O.K. Crosser, “Thermal conductivity of heterogeneous two component systems”, Industrial Engineering Chemistry Fundamentals,1, 187-191, (1962).
19
[19]. K.Y. Leong, R.T. Saidur, M.I. Mahlia, Y.H. Yau, “Entropy generation analysis of nanofluid flow in a circular tube subjected to constant wall temperature”, International Communications in Heat and Mass Transfer, 39, 1169-1175, (2012).
20
[20]. A. Tabrizi, H.R. Seyf, “Analysis of entropy generation and convective heat transfer of Al2O3 nanofluid flow in a tangential micro heat sink”, International Journal of Heat and Mass Transfer, 55, 4366-4375, (2012).
21
[21]. H.R. Seyf, M. Feizbakhshi, “Computation analysis of nanofluid effects on convective heat transfer enhancement of micro-pin-fin heat sinks”, International Journal of Thermal Sciences,58, 168-179, (2012).
22
[22]. M. Nazififard, M. Nematollahi, K. Jafarpur, K.Y. Suh, “Numerical simulation of water-based Alumina nanofluid in sub-channel geometry’’, Science and Technology of Nuclear Installations, doi:10.1155/2012/928406, (2012).
23
[23]. V. Bianco, F. Chiacchio, O. Manca, S. Nardini, “Numerical investigation of nanofluids forced convection in circular tubes”, Applied Thermal Engineering, 29, 3632-3642, (2009).
24
[24]. R. Vajjha, D.K. Das, P.K. Namburu, “Numerical study of fluid dynamic and heat transfer performance of Al2O3 and CuO nanofluids in the flat tubes of a radiator”, International Journal of Heat and Fluid Flow, 31, 613-621, (2013).
25
[25]. A. Akbarinia, A. Behzadmehr, “Numerical study of laminar mixed convection of nanofluid in horizontal curved tubes”, Applied Thermal Engineering, 27, 1327-1337 (2007).
26
[26]. J. Choi, Y. Zhang, “Numerical simulation of laminar forced convection heat transfer of Al2O3-water nanofluid in a pipe with return bend”, International Journal of Thermal Sciences, 55, 90-102, (2009).
27
[27]. A.A. Minea, “Numerical simulation of nanoparticle concentration effect on forced convection in a tube with nanofluids”, Heat Transfer Engineering, 36, 1144-1153, (2015).
28
[28]. L. Zhang, M. Bai, D. Guo, “Effect of vibration on forced convection heat transfer for SiO2-water nanofluids” Heat transfer Engineering, 36, 452-461, (2015).
29
[29]. S.K. Das, S.U.S Choi, H.E. Patel, “Heat Transfer in Nanofluids- A Review”, Heat Transfer Engineering, 27, 3-19, (2006).
30
[30]. S.Z. Haris, Z. Edalati, S.H. Noie, O. Mahian, “Experimental investigation of Al2O3/water nanofluid through equilateral triangular duct with constant wall heat flux in laminar flow”, Heat Transfer Engineering,35, 1173-1182, (2014).
31
[31]. S.E.B Maiga, S.J. Palm, C.T. Nguyen, C.T.G. Roy, N. Galanis, “Heat transfer enhancement by using nanofluids in forced convection flows”, International Journal of Heat and Fluid Flow, 26, 530-546, (2005).
32
[32]. M. Mahmoodi, “Numerical simulation of free convection of a nanofluid in L-shaped cavities”, International Journal of Thermal Sciences, 50, 1731-1740, (2011).
33
[33]. Z.U.A. Waris, ‘‘Fluid Dynamics Theoretical and Computational Approaches’’, Second ed. CRC Press, Boca Raton, Florida, USA, (1999).
34
[34]. S.V. Patankar, “Numerical Heat Transfer and Fluid Flow”, Hemisphere Publishing Corporation, New York, (1980).
35
[35]. B.C. Pak, Y.I. Cho, “Hydrodynamic and heat transfer study of dispersed fluids with submicron metallic oxide particles”, Experimental Heat Transfer, 11, 151-170, (1998).
36
[36]. S.J. Palm, G. Roy, C.T. Nguyen, ‘‘Heat transfer enhancement with use of nanofluids in radial flow cooling systems considering temperature dependent properties”, Applied Thermal Engineering, 26, 2209-2218, (2006).
37
[37]. S.E.B. Maiga, C.T. Nguyen, N. Galanis, G. Roy, “Heat transfer behaviours of nanofluids in a uniformly heated tube,” Superlattices Microstructures,vol. 35, (2004) pp. 543–557.
38
[38]. X. Wang, X. Xu, S.U.S., Choi, “Thermal conductivity of nanoparticle–fluid mixture”, Journal of Thermophysics and Heat Transfer, 13, 474–480, (1999).
39
[39]. S. Lee, S.U.S. Choi, S. Li, J.A. Eastman, “Measuring thermal conductivity of fluids containing oxide nanoparticles”, Journal of Heat Transfer, 121, 280–289, (1999).
40
[40]. T.T. Chandratilleke, Nursubyakto, “Numerical prediction of secondary flow and convective heat transfer in externally heated curved rectangular ducts”, International Journal of Thermal Sciences, 42, 187–198, (2003).
41
[41]. E. N. Sieder, G. E. Tate, “Heat Transfer and pressure drop of liquid in tubes”, Ind. Eng. Chem.,28, 1429-1435, (1936).
42
[42]. S.Z. Heris, T.H. Nassan, S.H. Noie, H. Sardarabadi, M. Sardarabadi, “Laminar convective heat transfer of Al2O3/water nanofluid through square cross-sectional duct”, International Journal of Heat and Fluid Flow, 44, 375-382, (2013).
43
[43]. B. Farajollaha, S.G. Etemad, M. Hojjat, “Heat transfer of nanofluids in a shell and tube heat exchanger”, International Journal of Heat and Mass Transfer, 53, 12-17, (2010).
44
[44]. P.K. Namburu, D.K. Das, K.M. Tanguturi, R.S. Vijjha, “Numerical study of fluid flow and heat transfer characteristics of nanofluids considering variable properties”, International Journal of Thermal Sciences, 48, 293-302, (2009).
45
[45]. G. Chakraborty, “A note on methods for analysis of flow through microchannels”, International Journal of Heat and Mass Transfer, 51, 4583-4588, (2008).
46
[46]. K. Muralidhar G. Biswas, ‘‘Advanced engineering fluid mechanics’’, Norosa Publishing House, New Delhi, (2005).
47
[47]. N.T.R. Kumar, P. Bharamara, M.M. Addis, L. S. Sundar, M.K. Singh, A.C.M. Sousa, “Heat transfer, friction factor and effectiveness analysis of Fe3O4/water nanofluid flow in a double pipe heat exchanger with return bend”, International Communications in Heat and Mass Transfer, 81, 155-163, (2017).
48
[48]. L. Colla, L. Fedele, M.H. Buschmann, “Laminar mixed convection of TiO2-water nanofluid in a horizontal uniformly heated pipe flow”, International Journal of Thermal Sciences, 97, 26-40, (2015).
49
[49]. K. Khanafer, K. Vafai, “A critical synthesis of thermophysical characteristics of nanofluids”, International Journal of Heat and Mass Transfer, 54, 4410-4428, (2011).
50
B.B. Nayak, D. Chatterjee, A.N. Mullick, “ Numerical prediction of flow and heat transfer characteristics of water –fly ash slurry a 180° return bend pipe”, International Journal of Thermal Sciences, 113 110-115, (2017)
51
ORIGINAL_ARTICLE
Analytical and numerical investigation of heat and mass transfer effects on magnetohydrodynamic natural convective flow past a vertical porous plate
The aim of this investigation is to study the effect of hall current on an unsteady natural convective flow of a viscous, incompressible, electrically conducting optically thick radiating fluid past a vertical porous plate in the presence of a uniform transverse magnetic field. The Rosseland diffusion approximation is used to describe the radiative heat flux in the energy equation. Analytical and numerical solutions of the coupled governing partial differential equations for the fluid velocity, fluid temperature and fluid concentration profiles are obtained by perturbation and finite element techniques respectively. The effects of the various dimensionless engineering parameters viz., Grashof number for heat and mass transfer, Magnetic field parameter, Prandtl number, Schmidt number, Thermal radiation parameter and Hall parameter entering into the problem on the primary and secondary velocities, temperature and concentration profiles throughout the boundary layer are investigated through graphs. The expressions of skin-friction, Nusselt number and Sherwood number are derived and represented through tabular form. The results reveal that the flow field and the temperature distribution are greatly influenced by thermal radiation parameter. Furthermore, the limiting cases are obtained and are found to be in good agreement with the previously published results.
http://jhmtr.journals.semnan.ac.ir/article_2633_7e8a71c479ed92604667c739e19e1592.pdf
2017-10-01T11:23:20
2018-06-22T11:23:20
117
133
10.22075/jhmtr.2017.1854.1142
Heat and mass transfer
natural convection
Hall current
Porous medium
Finite element method
Perturbation Technique
Srinivasa Raju
Rallabandi
srivass999@gmail.com
true
1
GITAM University
GITAM University
GITAM University
LEAD_AUTHOR
Anitha
G
k.anitha72@gmail.com
true
2
GITAM University
GITAM University
GITAM University
AUTHOR
Jithender Reddy
G
jithendergurejala@gmail.com
true
3
VNR Vignana Jyothi Institute of Engineering and Technology
VNR Vignana Jyothi Institute of Engineering and Technology
VNR Vignana Jyothi Institute of Engineering and Technology
AUTHOR
References
1
[1]. R. Srinivasa Raju, G. Jithender Reddy, J. Anand Rao, M. M. Rashidi, Rama Subba Reddy Gorla, ‘‘Analytical and Numerical Study of Unsteady MHD Free Convection Flow over an Exponentially Moving Vertical Plate With Heat Absorption’’, Int. J. Thermal Sci., 107, 303-315 (2016).
2
[2]. S. Reddy Sheri, R. Srinivasa Raju, ‘‘Transient MHD free convective flow past an infinite vertical plate embedded in a porous medium with viscous dissipation’’, Meccanica, 51(5), 1057-1068, (2016).
3
[3]. R. Srinivasa Raju, B. Mahesh Reddy, M.M. Rashidi, Rama Subba Reddy Gorla, ‘‘Application of Finite Element Method to Unsteady MHD Free Convection Flow Past a Vertically Inclined Porous Plate Including Thermal Diffusion And Diffusion Thermo Effects’’, J. Porous Media, 19 (8), 701-722, (2016).
4
[4]. R. Srinivasa Raju, G. Jitthender Reddy, J. Anand Rao, M.M. Rashidi, ‘‘Thermal Diffusion and Diffusion Thermo Effects on an Unsteady Heat and Mass Transfer MHD Natural Convection Couette Flow Using FEM’’, J. Comp. Design and Eng., 3 (4), 349-362, (2016).
5
[5]. M.V. Ramana Murthy, R. Srinivasa Raju, J. Anand Rao, ‘‘Heat and Mass transfer effects on MHD natural convective flow past an infinite vertical porous plate with thermal radiation and Hall Current’’, Procedia Eng. J., 127, 1330-1337, (2015).
6
[6]. S. Sivaiah, R. Srinivasa Raju, "Finite Element Solution of Heat and Mass transfer flow with Hall Current, heat source and viscous dissipation", Appl. Math. Mech., 34 (5), 559-570, (2013).
7
[7]. J. Anand Rao, R. Srinivasa Raju, S. Sivaiah, ‘‘Finite Element Solution of heat and mass transfer in MHD Flow of a viscous fluid past a vertical plate under oscillatory suction velocity’’, J. Appl. Fluid Mech., 5 (3), 1-10, (2012).
8
[8]. J. Anand Rao, S. Sivaiah, R. Srinivasa Raju, ‘‘Chemical Reaction effects on an unsteady MHD free convection fluid flow past a semi-infinite vertical plate embedded in a porous medium with Heat Absorption’’, J. Appl. Fluid Mech., 5 (3), 63-70, (2012).
9
[9]. G. Jitthender Reddy, R. Srinivasa Raju, J. Anand Rao, ‘‘Thermal Diffusion and Diffusion Thermo impact on Chemical reacted MHD Free Convection from an Impulsively Started Infinite Vertical Plate embedded in a Porous Medium using FEM’’, J. Porous Media, 20 (12), 1097-1117, (2017).
10
[10]. R. Dodda, R. Srinivasa Raju, J. Anand Rao, ‘‘Influence Of Chemical Reaction On MHD boundary Layer flow Of Nano Fluids Over A Nonlinear Stretching Sheet With Thermal Radiation’’, J. Nanofluids, 5 (6), 880-888, (2016).
11
[11]. R. Dodda, R. Srinivasa Raju, J. Anand Rao, ‘‘Slip Effect of MHD Boundary Layer Flow of Nanofluid Particles over a Nonlinearly Isothermal Stretching Sheet in Presence of Heat Generation/Absorption’’, Int. J. Nanosci. Nanotech., 12(4), 251-268, (2016).
12
[12]. J. Anand Rao, R. Srinivasa Raju, S. Sivaiah, ‘‘Finite Element Solution of MHD transient flow past an impulsively started infinite horizontal porous plate in a rotating fluid with Hall current’’, J. Appl. Fluid Mech., 5(3), 105-112, (2016).
13
[13]. V.S. Rao, L. Anand Babu, R. Srinivasa Raju, ‘‘Finite Element Analysis of Radiation and mass transfer flow past semi-infinite moving vertical plate with viscous dissipation’’, J. Appl. Fluid Mech., 6 (3), 321-329, (2013).
14
[14]. R. Srinivasa Raju, ‘‘Combined influence of thermal diffusion and diffusion thermo on unsteady hydromagnetic free convective fluid flow past an infinite vertical porous plate in presence of chemical reaction’’, J. Inst. Eng.: Series C, 97(4), 505-515, (2016).
15
[15]. R. Srinivasa Raju, K. Sudhakar, M. Rangamma, ‘‘The effects of thermal radiation and Heat source on an unsteady MHD free convection flow past an infinite vertical plate with thermal diffusion and diffusion thermo’’, J. Inst. Eng.: Series C, 94(2), 175-186, (2013).
16
[16]. A. Aghaei, H. Khorasanizadeh, G. Sheikhzadeh, Mahmoud Abbaszadeh, ‘‘Numerical study of magnetic field on mixed convection and entropy generation of nanofluid in a trapezoidal enclosure’’, J. Magn. Mater., 403, 133-145, (2016).
17
[17]. A. Aghaei, A. A. Abbasian Arani, F. Abedi, ‘‘Analysis of Magnetic Field Effects on Distributed Heat Sources in a Nanofluid-Filled Enclosure by Natural Convection’’, J. Appl. Fluid Mech., 9(3), 1175-1187, (2016).
18
[18]. R. Deka, U. N. Das, V. M. Soundalgekar, ‘‘Effects of mass transfer flow past an impulsively started infinite vertical plate with constant heat flux and chemical reaction’’, Forsch. Ingenieurwes., 60, 284-287, (1994).
19
[19]. R. Muthucumaraswamy, P. Ganesan, ‘‘Effect of the chemical reaction and injection on flow characteristics in an unsteady upward motion of an isothermal plate’’, J. Appl. Mech. Tech. Phys., 42, 665-671, (2001).
20
[20]. A.J. Chamkha, ‘‘MHD flow of a uniformly stretched vertical permeable surface in the presence of heat generation/absorption and a chemical reaction’’, Int. Commun. Heat Mass Transfer, 30, 413-422, (2003).
21
[21]. F.S. Ibrahim, A.M. Elaiw, A.A. Bakr, ‘‘Effect of the chemical reaction and radiation absorption on the unsteady MHD free convection flow past a semi infinite vertical permeable moving plate with heat source and suction’’, Commun. Nonlinear Sci. Numer. Simul., 13, 1056-1066, (2008).
22
[22]. M.M. Rahman, ‘‘Convective flows of micropolar fluids from radiate isothermal porous surfaces with viscous dissipation and Joule heating’’, Commun. Nonlinear Sci. Numer. Simul., 14, 3018-3030, (2009).
23
[23]. A.C. Cogley, W.E. Vincenty, S.E. Gilles, ‘‘Differential approximation for radiation in a non-gray gas near equilibrium’’, AIAA J., 6, (1968) pp. 551-553.
24
[24]. M.D. Abdus Sattar, Kalim MD. Hamid, ‘‘Unsteady free-convection interaction with thermal radiation in a boundary layer flow past a vertical porous plate’’, J. Math. Phys. Sci., 30, 25-37, (1996).
25
[25]. K. Vajravelu, ‘‘Flow and heat transfer in a saturated porous medium’’, ZAMM, 74, 605-614, (1994).
26
[26]. M.A. Hossain, H.S. Takhar, ‘‘Radiation effect on mixed convection along a vertical plate with uniform surface temperature’’, Heat Mass Transf., 31, 243-248, (1996).
27
[27]. A. Raptis, ‘‘Radiation and free convection flow through a porous medium’’, Int. Commun. Heat Mass Transf., 25, 289-295, (1998).
28
[28]. O.D. Makinde, ‘‘Free convection flow with thermal radiation and mass transfer past a moving vertical porous plate’’, Int. Commun. Heat Mass Transf., 32, 1411-1419, (2005).
29
[29]. F.S. Ibrahim, A.M. Elaiw, A.A. Bakr, ‘‘Effect of the chemical reaction and radiation absorption on unsteady MHD mixed convection flow past a semi-infinite vertical permeable moving plate with heat source and suction’’, Commun. Nonlinear Sci. Numer. Simul., 13, 1056-1066, (2008).
30
[30]. A.A. Bakr, ‘‘Effects of chemical reaction on MHD free convection and mass transfer flow of a micropolar fluid with oscillatory plate velocity and constant heat source in a rotating frame of reference’’, Commun. Nonlinear Sci. Numer. Simul., 16, 698-710, (2011).
31
[31]. I. Pop, T. Watanabe, ‘‘Hall effect on magneto hydrodynamic free convection about a semi-infinite vertical flat plate’’, Int. J. Eng. Sci., 32, 1903-1911, (1994).
32
[32]. E.M. Abo-Eldahab, E.M.E. Elbarbary, ‘‘Hall current effect on magnetohydrodynamic free-convection flow past a semi-infinite vertical plate with mass transfer’’, Int. J. Eng. Sci., 39, 1641-52, (2001).
33
[33]. H.S. Takhar, S. Roy, G. Nath, ‘‘Unsteady free convection flow over an infinite vertical porous plate due to the combined effects of thermal and mass diffusion, magnetic field and Hall currents’’, Heat Mass Transf., 39, 8258-34, (2003).
34
[34]. L.K. Saha, S. Siddiqa, M.A. Hossain, ‘‘Effect of Hall current on MHD natural convection flow from vertical permeable flat plate with uniform surface heat flux’’, Appl. Math. Mech. -Engl. Ed., 32(9), 1127-1146, (2011).
35
[35]. P.V. Satya Narayana B. Venkateswarlu, S. Venkataramana, ‘‘Effects of Hall current and radiation absorption on MHD micropolar fluid in a rotating system’’, Ain Shams Eng. J., http://dx.doi.org/10.1016/j.asej.2013.02.002, (2013).
36
[36]. G.S. Seth, G.K. Mahato, S. Sarkar, ‘‘Effects of Hall current and rotation on MHD natural convection flow past an impulsively moving vertical plate with ramped temperature in the presence of thermal diffusion with heat absorption’’, Int. J. Energy Tech., 5(16), 1-12, (2013).
37
[37]. B.K. Sharma, R.C. Chaudhary, ‘‘Hydromagnetic unsteady mixed convection and mass transfer flow past a vertical porous plate immersed in a porous medium with Hall Effect’’, Eng. Trans., 56(1), 3-23, (2008).
38
[38]. K.R. Cramer, S.I. Pai, ‘‘Magnetofluid dynamics for engineers and applied physicists’’, McGraw Hill Book Company, New York (1973).
39
[39]. M.Q. Brewster, ‘‘Thermal Radiative Transfer and Properties’’, John Wiley & Sons, New York, USA, (1992).
40
[40]. K.J. Bathe, "Finite Element Procedures", Prentice-Hall, New Jersey, (1996).
41
[41]. J.N. Reddy, ‘‘An Introduction to the Finite Element Method’’, McGraw-Hill Book Company, New York, 3rd Edition, (2006).
42
ORIGINAL_ARTICLE
Effects of variations in magnetic Reynolds number on magnetic field distribution in electrically conducting fluid under magnetohydrodynamic natural convection
In this study the effect of magnetic Reynolds number variation on magnetic distribution of natural convection heat transfer in an enclosure is numerically investigated. The geometry is a two dimensional enclosure which the left wall is hot, the right wall is cold and the top and bottom walls are adiabatic. Fluid is molten sodium with Pr=0.01 and natural convection heat transfer for Rayleigh number, Ra=105 , and magnetic Reynolds numbers 10-1, 10-3 and 10-5 are considered and the governing equations including continuum, momentum, energy and magnetic induction are solved together concurrent. The numerical method finite volume and simpler algorithm for coupling the velocity and pressure is used. The results show for high magnetic Reynolds number the non-dimensional magnetic field in X and Y directions approximately are constant because diffusion of magnetic Reynolds number is more than advection but as magnetic Reynolds number increases the magnetic field in enclosure is not equal to applied magnetic field and is not constant and deviation from one is increased so that for Rem=10-1 the non-dimensional magnetic field in X direction from 0.09 to 6.6 and in Y direction from -1.164 to 4.05 changes.
http://jhmtr.journals.semnan.ac.ir/article_2703_579271ec309bafa338bc1aa3019ccc8b.pdf
2017-10-01T11:23:20
2018-06-22T11:23:20
149
155
10.22075/jhmtr.2017.1797.1135
Magnetic Reynolds number
natural convection
magnetic field
Mohsen
Pirmohammadi
pirmohamadi@pardisiau.ac.ir
true
1
Islamic Azad University, Pardis Branch
Islamic Azad University, Pardis Branch
Islamic Azad University, Pardis Branch
LEAD_AUTHOR
References
1
[1]. G.M. Oreper and J. Szekely, “The effect of an externally imposed magnetic field on buoyancy driven flow in a rectangular cavity”, J. Cryst. Growth, 64, 505–515, (1983).
2
[2]. H. BenHadid, D. Henry, ‘‘Numerical study of convection in the horizontal Bridgman configuration under the action of a constant magnetic field. Part 2. Three-dimensional flow’’, J. Fluid Mech., 333, 57–83, (1997).
3
[3]. R. Bessaiha, M. Kadja, Ph. Marty, ‘‘Effect of wall electrical conductivity and magnetic field orientation on liquid metal flow in a geometry similar to the horizontal Bridgman configuration for crystal growth’’, International Journal of Heat and Mass Transfer, 42, 4345-4362, (1999).
4
[4]. M. Ciofalo and F. Cricchio, ‘‘Influence of a magnetic field on liquid metal free convection in an internally heated cubic enclosure’’, International Journal of Numerical Methods for Heat & Fluid Flow, 12(6), 687-715, (2002).
5
[5]. I.D. Piazza, M. Ciofalo, ‘‘MHD free convection in a liquid metal filled cubic enclosure I. Differential heating’’, Int. J. Heat Mass Transfer 45, 1477–1492, (2002).
6
[6]. I.D. Piazza, M. Ciofalo, ‘‘MHD free convection in a liquid metal filled cubic enclosure II. Internal heating’’, Int. J. Heat Mass Transfer 45, 1493–1511, (2002).
7
[7]. M. Pirmohammadi, M. Ghassemi, ‘‘Effect of magnetic field on convection heat transfer inside a tilted square enclosure’’, International Communication in Heat and Mass Transfer, 36, 776–780, (2009).
8
[8]. M. Pirmohammadi, M. Ghassemi, A. Keshtkar, ‘‘Numerical study of hydromagnetic convection of an electrically conductive fluid with variable properties inside an enclosure’’, IEEE Transactions on Plasma Science, 39, 516–520, (2011).
9
[9]. N.M. Al-Najem, K.M. Khanafer, M.M. El-Rafaee, ‘‘Numerical study of laminar natural convection in tilted enclosure with transverse magnetic field’’, Int. J. Numer. Meth. Heat Fluid Flow, 8, 651–672, (1998).
10
[10]. N. Rudraiah, R.M. Barron, M. Venkatachalappa, C.K. Subbaraya, ‘‘Effect of a magnetic field on free convection in a rectangular enclosure’’, Int. J. Eng. Sci., 33, 1075–1084, (1995).
11
[11]. F. Selimefendigil, H.F. Oztop, K. Al-Salem, Natural convection of ferrofluids in partially heated square enclosures, J. Magn. Magn. Mater., 372, , 122–133, (2014).
12
[12]. H. Heidary, R. Hosseini, M. Pirmohammadi, M. J. Kermani, ‘‘Numerical study of magnetic field effect on nano-fluid forced convection in a channel’’, Journal of Magnetism and Magnetic Matrials, 374, 11-17, (2014).
13
[13]. N.S. Bondareva, M.A. Sheremet, I. Pop, ‘‘Magnetic field effect on the unsteady natural convection in a right-angle trapezoidal cavity filled with a nanofluid’’, Int. J. Numer. Methods Heat. Fluid Flow., 25, 1924–1946, (2015).
14
[14]. I.V. Miroshnichenko, M.A. Sheremet, H.F. Oztopc, K. A-Salem, ‘‘MHD natural convection in a partially open trapezoidal cavity filled with a nanofluid’’, International Journal of Mechanical Sciences, 119, 294–302, (2016).
15
[15]. P.A. Davidson, ‘‘An Introduction to Magnetohydrodynamics’’, Cambridge University Press, Cambridge, 2001.
16
[16]. U. Müller, L. Bühler, ‘‘Magnetofluiddynamics in channels and containers’’, Springer, Wien, New York, (2001).
17
[17]. S.S. Sazhin, M. Makhlouf, ‘‘Solutions of magnetohydrodynamic problems based on a convectional computational fluid dynamic code’’, International Journal for Numerical Methods in Fluids, 21, 433-442, (1995).
18
[18]. E. Sarris , G. K. Zikos, A. P. Grecos, N.S. Vlachos, “On the Limits of Validity of the Low Magnetic ReynoldsNumber Approximation in MHD Natural-Convection HeatTransfer”, Numerical Heat Transfer (Part B), 50, 157-180, (2006).
19
ORIGINAL_ARTICLE
Thermodynamic analysis of a magnetohydrodyamic oldroyd 8-constant fluid in a vertical channel with heat source and slippage
Thermodynamic analysis of a steady state flow and heat transfer of an Oldroyd 8-constant fluid with effect of heat source, velocity slip and buoyancy force under tranverse a magnetic field is is carried out in this paper. The model for momentum and energy balance is tackled numerically using Method of Weighted Residual (MWR). Partition method is used to minimize the associated residuals. The results obtained were compared with that obtained using inbuilt numerical solver in MAPLE 18 to validate the method used and the convergence of the method is discussed. The results obtained from the momentum and energy balance were used to compute the entropy generation rate and the irreversibility ratio. The effects of controlling parameters such as non-Newtonian parameters, slip parameters, Grashoff number parameter, Brinkmann number, Hartmann, heat source parameter on the non dimensional velocity, temperature, entropy generation rate and irreversibility ratio are presented graphically and discussed. It is observed that irreversibility due to fluid friction dominates over the heat transfer when the non Newtonian parameter is kept constant for various values of , while irreversibility due to heat transfer dominate over fluid friction for various values of with fixed value .
http://jhmtr.journals.semnan.ac.ir/article_2993_f3ab1e9594b96863ecf2ac97b4e4ea91.pdf
2017-10-01T11:23:20
2018-06-22T11:23:20
135
148
10.22075/jhmtr.2017.11126.1154
: Oldroyd 8-constant fluid
Entropy generation
Bouyancy effect
Heat source
Bejan number
Jacob
Gbadeyan
j.agbadeyan@yahoo.com
true
1
Mathematics, Physical sciences, university of Ilorin kwara state nigeria
Mathematics, Physical sciences, university of Ilorin kwara state nigeria
Mathematics, Physical sciences, university of Ilorin kwara state nigeria
AUTHOR
Tunde
Yusuf
tundeayusuf04@gmail.com
true
2
Mathematics, physical sciences, University of Ilorin, kwara state Nigeria
Mathematics, physical sciences, University of Ilorin, kwara state Nigeria
Mathematics, physical sciences, University of Ilorin, kwara state Nigeria
LEAD_AUTHOR
References
1
[1]. J.G, Oldroyd, ‘‘On the formulation of rheological equation of state’’, Proc. Roy. soc. Londo. A, 200, 523-541, (1950).
2
[2]. R.B. Bird, R.C. Armstrong, O. Hassager, ‘‘Dynamics of polymeric liquids’’, Fluid Mech.1, PP. 354, New York: Wiley, (1987).
3
[3]. T. Hayat, M. Khan, and S. Asghar, ‘‘Homotopy analysis of MHD flows of an Oldroyd 8-constant fluid’’, Acta Mechanica, 168, 213–232, (2004).
4
[4]. T. Hayat, M. Khan, S. Asghar, ‘‘Megnetohydrodynamic flow of an Oldroyd 6-constant fluid’’, Applied Mathematics and Computation, 155, 417-425, (2004).
5
[5].T. Hayat, M. Khan, M. Ayub, ‘‘Effect of slip condition on flow of an Oldroyd 6-constant fluid’’, Journal of computation and Applied Mathematics, 202, 402-413, (2007).
6
[6].R. Ellahi,T. Hayat, T. Javed, S. Asghar, ‘‘On the analytic solution of nonlinear flow problem involving Oldroyd 8-constant fluid’’, Mathematical and Computer Modeling, 48, 1191-1200, (2008).
7
[7].S. Baris, ‘‘Flow of an Oldroyd 8-constant fluid in a convergent channel’’, Acta Mechanica, 148, 47-127, (2001).
8
[8]. M. Khan, Qurrat-ul-Ain, M. Sajid, ‘‘Heat transfer analysis of the steady flow of an Oldroyd 8-constant fluid due to suddenly moved plate’’, Commun Nonlinear Sci Numer Simulat, 16, 1347-1355, (2011).
9
[9]. M. Khan, T. Hayat, M. Ayub, ‘‘Numerical study of partial slip on the MHD flow of an Oldroyd 8-constant fluid’’, Computers and Mathematics with Applications, 53, 1088-1097, (2007).
10
[10]. M. Khan, T. Hayat, W. Wang, ‘‘Slip effects on shearing flows in a porous medium’’, Acta Mech Sin, 24, 51-59, (2008).
11
[11]. S. Das, R.N, Jana, ‘‘Entropy generation due to MHD flow in a channel with Navier slip’’, Ain Shams Eng. J., 5, 575-584, (2014).
12
[12]. J.A. Gbadeyan, T.A. Yusuf, M.S Dada, J.O. Akinremi, ‘‘Effects Of slippage and couple stresses on entropy generation in a porous channel filled with highly porous medium’’, Ilorin Journal of Science 2(1), 48-67, (2015).
13
[13]. J.A. Gbadeyan, T.A. Yusuf, ‘‘Second law analysis of radiative unsteady MHD fluid flow with partial slip and convective boundary cooling’’, Asian Journal of Mathematics and computer research, 17(4), 212-236, (2017).
14
[14]. A.S. Eegunjobi, O.D. Makinde, ‘‘Combined effect of buoyancy force and Navier slip on entropy generation in a vertical porous channel’’, Entropy, 14, 1028-1044, (2012).
15
[15]. A. Bejan. ‘‘Entropy generation minimization’’. New York, NY, USA, (1996) CRC Press.
16
[16]. A. Bejan. ‘‘Second Law Analysis in heat transfer’’, Energy Int J., 5(7), 21-23, (1980).
17
[17]. A. Bejan. ‘‘Second Law Analysis in heat transfer and thermal design’’, Adv. Heat Transf., 15, 1-58, (1982).
18
[18]. P. Vyas, A. Rai, ‘‘Entropy regime for radiation MHD Couette flow inside a channel with naturally permeable base’’, International Journal of energy and Technology, 5(19), 1-9, (2013).
19
[19]. S.O Adesanya, S.O. Kareem, J.A. Falade and S.A. Arekete, ‘‘Entropy generation analysis for a reactive couple stress fluid flow through a channel saturated with porous material’’, Energy, 93, 1239-1245, (2015).
20
[20]. S.O. Adesanya, J.A. Falade, ‘‘Thermodynamics analysis of hydromagnetic third grade fluid flow through a channel filled with porous medium’’, Alexandria engineering journal, 54, 615-622, (2015).
21
[21]. S.O. Adesanya, ‘‘Second law analysis for third-grade fluid with variable properties’’, Journal of thermodynamics. Article ID 452168, 8 pages http://dx.doi.org/10.1155/2014/452168, (2014).
22
[22]. S.O. Adesanya, O.D. Makinde, ‘‘Entropy generation in couple stress fluid through porous channel with fluid slippage’’, Int J. Exergy 15(3), 344-362, (2014).
23
[23]. A.O. Ajibade, B.K. Jha, A. Omame, ‘‘Entropy Generation Under the effects of suction/injection’’ Applied Mathematical Modelling., 35, 4630-4046, (2011).
24
[24]. Y.A.S. Aregbesola, ‘‘Numerical solution of Bratu problems using the method of weighted residuals’’, Electronic Journal of Southern African Math. Sci. Association (SAMSA), 3, 1-7, (2003).
25
[25]. P.M. Ghesemi, M. Abbasi, M. Khaki, ‘‘New Analytic Solution of MHD fluid flow of fourth grade fluid through the channel with slip condition via collocation method’’, Int. J. Adv. Appl. Math and Mech., 2(3), 87-94, (2015).
26
[26]. S.T. Ledari, H. Mirgolbabaee, D.D. Ganji, ‘‘Heat transfer analysis of a fin with temperature dependent thermal conductivity and heat transfer coefficient’’, New Trends in Mathematical Sciences. 3(2), 55-69, (2015).
27
[27]. S.A. Odejide, Y.A.S. Aregbesola,‘‘Applications of Method of Weighted Residuals to Problems with Infinite Domain’’, Rom. Journ Phys., 56(2), (2011) 14-24, (2011).
28