Rahman, M.M. and Mamun, M.A.H. and Saidur, Rahman and Nagata, S. (2009) Effect of a heat conducting horizontal circular cylinder on MHD mixed convection in a liddriven cavity along with joule heating. International Journal of Mechanical and Materials Engineering, 4 (3). pp. 256265. ISSN 18230334

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Abstract
Magnetohydrodynamic (MHD) mixed convection in a liddriven cavity along with joule heating is studied numerically. The cavity consists of adiabatic horizontal walls and differentially heated vertical walls, but it also contains a heat conducting horizontal circular cylinder located somewhere within the cavity. The aim of the study is to delineate the effect of such a cylinder on the flow and temperature fields. The governing equations are first transformed into a non dimensional form and resulting nonlinear system of partial differential equations are then solved by using Galerkin weighted residual method of finite element formulation. The analysis is conducted by observing variations of the streamlines and isotherms for the size, locations and thermal conductivity of the cylinder at the Richardson number Ri ranging from 0.0 to 5.0, Prandtl number Pr = 0.71 and Reynolds number Re = 100 with constant physical properties. The results indicated that both the streamlines and isotherms strongly depend on the size and locations of the inner cylinder, but the thermal conductivity of the cylinder has significant effect only on the isothermal lines. The variations of average Nusselt number on the hot wall and average fluid temperature in the cavity are also presented to show the overall heat transfer characteristics inside the cavity.
Item Type:  Article 

Additional Information:  Cited By (since 1996): 5 Export Date: 6 December 2012 Source: Scopus Language of Original Document: English Correspondence Address: Rahman, M. M.; Department of Mathematics, Bangladesh University of Engineering and Technology (BUET), Dhaka1000, Bangladesh; email: mmustafizurrahman@math.buet.ac.bd References: Aydin, O., Aiding and opposing mechanisms of mixed convection in a shearbuoyancy driven cavity (1999) Int. Commun. Heat Mass Transfer, 26, pp. 10191028; Aydin, O., Yang, W.J., Mixed convection in cavities with a locally heated lower wall and moving sidewalls (2000) Numer. Heat Transfer, Part A, 37, pp. 695710; Braga, E. J., de Lemos, M. J. S., 2005. Laminar natural convection in cavities filed with circular and square rods, Int. Commun. in Heat and Mass Transfer, 32, pp. 12891297Chamkha, A.J., Hydromagnetic combined convection flow in a vertical liddriven cavity with internal heat generation or absorption (2002) Numer. Heat Transfer, Part A, 41, pp. 529546; Dong, S.F., Li, Y.T., Conjugate of natural convection and conduction in a complicated enclosure (2004) Int. J. of Heat and Mass Transfer, 47, pp. 22332239; Garandet, J.P., Alboussiere, T., Moreau, R., Buoyancy driven convection in a rectangular enclosure with a transverse magnetic field (1992) Int. J. of Heat Mass Transfer, 35, pp. 741748; Guo, G., Sharif, M. A. R., 2004. Mixed convection in rectangular cavities at various aspect ratios with moving isothermal sidewalls and constant flux heat source on the bottom wall, Int. J. of Thermal Sciences, 43, pp. 465475Hossain, M.A., Gorla, R.S.R., Effect of viscous dissipation on mixed convection flow of water near its density maximum in a rectangular enclosure with isothermal wall (2006) Int. J. of Numer. Methods for Heat and Fluid Flow, 16 (1), pp. 517; Jaluria, Y., Torrance, K.E., (1986) Computational Heat Transfer, , Hemisphere, Washington; Kumar De, A., Dalai, A., A numerical study of natural convection around a square, horizontal, heated cylinder placed in an enclosure (2006) Int. J. of Heat and Mass Transfer, 49, pp. 46084623; Lee, J.R., Ha, M.Y., A numerical study of natural convection in a horizontal enclosure with a conducting body (2005) Int. J. of Heat and Mass Transfer, 48, pp. 33083318; Lee, J.R., Ha, M.Y., Numerical simulation of natural convection in a horizontal enclosure with a heatgenerating conducting body (2006) Int. J. of Heat and Mass Transfer, 49, pp. 26842702; Luo, W.J., Yang, R.J., Multiple fluid flow and heat transfer solutions in a twosided liddriven cavity (2007) Int. J. of Heat and Mass Transfer, 50, pp. 23942405; Moallemi, M.K., Jang, K.S., Prandtl number effects on laminar mixed convection heat transfer in a liddriven cavity (1992) Int. J. Heat and Mass Transfer, 35, pp. 18811892; Oztop, H.F., Dagtekin, I., Mixed convection in twosided liddriven differentially heated square cavity (2004) Int. J. of Heat and Mass Transfer, 47, pp. 17611769; Prasad, A.K., Koseff, J.R., Combined forced and natural convection heat transfer in a deep liddriven cavity flow (1996) Int. J. Heat and Fluid Flow, 17, pp. 460467; Rahman, M.M., Alim, M.A., Mamun, M.A.H., (2009) Finite Element Analysis of Mixed Convection in a Rectangular Cavity with a HeatConducting Horizontal Circular Cylinder, Nonlinear Analysis: Modelling and Control, 14 (2), pp. 217247; Rahman, M. M., Alim, M. A., Chowdhury, M. K., 2009a. Magneto hydrodynamics mixed convection around a heat conducting horizontal circular cylinder in a rectangular liddriven cavity with joule heating, J. of Sci. Res., 1, No. 3, pp. 461472Roychowdhury, D.G., Das, S.K., Sundararajan, T.S., Numerical simulation of natural convection heat transfer and fluid flow around a heated cylinder inside an enclosure (2002) Heat and Mass Transfer, 38, pp. 565576; Rudraiah, N., Barron, R.M., Venkatachalappa, M., Subbaraya, C.K., Effect of magnetic field on free convection in a rectangular enclosure (1995) Int. J. Engng. Sci, 33, pp. 10751084; Rudraiah, N., Venkatachalappa, M., Subbaraya, C.K., Combined surface tension and buoyancydriven convection in a rectangular open cavity in the presence of magnetic field (1995) Int. J. Nonlinear Mech, 30 (5), pp. 759770 
Uncontrolled Keywords:  Circular cylinder, Finite element method, Joule heating and Magnetohydrodynamic, Liddriven cavity, Mixed convection. 
Subjects:  T Technology > TA Engineering (General). Civil engineering (General) T Technology > TJ Mechanical engineering and machinery 
Divisions:  Faculty of Engineering 
Depositing User:  Mr Jenal S 
Date Deposited:  08 Jul 2013 00:57 
Last Modified:  25 Oct 2019 06:06 
URI:  http://eprints.um.edu.my/id/eprint/6780 
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