Magnetohydrodynamic mixed convection in a lid-driven rectangular enclosure partially heated at the bottom and cooled at the top

作者: Elif Ogut

DOI: 10.2298/TSCI141121053O

关键词: Hartmann numberMechanicsEnclosureHeat transfer coefficientHeat transferRichardson numberHeat fluxThermodynamicsCombined forced and natural convectionPhysicsFluid dynamics

摘要: In the present study, numerical simulation of magnetohydrodynamic (MHD) mixed convection heat transfer and fluid flow has been analyzed in a lid-driven enclosure provided with constant flux heater. Governing equations were solved via differential quadrature (DQ) method. Moving wall enclosure temperature speed. The calculations were performed for different Richardson number ranging from 0.1 to 10, heater length 0.2 0.8, location heater center 0.9, Hartmann 0 100 aspect ratio 0.5 2. Two magnetic field directions tested as vertical horizontal. It was found that results DQ method show good agreement literature. The magnetic more effective when it applied horizontally than that of way. both direction field, reduced flow strength transfer. Thus, can be used an important control parameter for flow.

参考文章(22)
MC Ece, E Büyük, None, The effect of an external magnetic field on natural convection in an inclined rectangular enclosure Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science. ,vol. 221, pp. 1609- 1622 ,(2007) , 10.1243/09544062JMES743
G.M. Oreper, J. Szekely, The effect of an externally imposed magnetic field on buoyancy driven flow in a rectangular cavity Journal of Crystal Growth. ,vol. 64, pp. 505- 515 ,(1983) , 10.1016/0022-0248(83)90335-4
Richard Bellman, John Casti, DIFFERENTIAL QUADRATURE AND LONG-TERM INTEGRATION Journal of Mathematical Analysis and Applications. ,vol. 34, pp. 235- 238 ,(1971) , 10.1016/0022-247X(71)90110-7
Kamil Kahveci, Semiha Öztuna, MHD natural convection flow and heat transfer in a laterally heated partitioned enclosure European Journal of Mechanics B-fluids. ,vol. 28, pp. 744- 752 ,(2009) , 10.1016/J.EUROMECHFLU.2009.07.001
N. Rudraiah, R.M. Barron, M. Venkatachalappa, C.K. Subbaraya, Effect of a magnetic field on free convection in a rectangular enclosure International Journal of Engineering Science. ,vol. 33, pp. 1075- 1084 ,(1995) , 10.1016/0020-7225(94)00120-9
Kamil Kahveci, Elif Buyuk Ogut, None, Mixed Convection of Water-Based Nanofluids in a Lid-Driven Square Enclosure with a Heat Source Heat Transfer Research. ,vol. 42, pp. 711- 735 ,(2011) , 10.1615/HEATTRANSRES.2012003587
S.M. Aminossadati, B. Ghasemi, A. Kargar, Computational analysis of magnetohydrodynamic natural convection in a square cavity with a thin fin European Journal of Mechanics B-fluids. ,vol. 46, pp. 154- 163 ,(2014) , 10.1016/J.EUROMECHFLU.2014.03.002