NATURAL CONVECTION STUDY IN AN ENCLOSURE WITH DIFFERENT ASPECT RATIOS

Yi Dong () and Qinglan Zhai ()
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Yi Dong: Science Department, Bengbu College, Bengbu 233050, P. R. China
Qinglan Zhai: Department of Management, Chaohu College, Chaohu 238000, P. R. China

International Journal of Modern Physics C (IJMPC), 2007, vol. 18, issue 12, 1903-1923

Abstract: Natural convection in an enclosure with different ratios are investigated with the lattice Boltzmann method, and double distribution functions (DDF) are proposed to simulate the velocity and the temperature fields. Meanwhile, compared with other existing results, we studied the effect of the different aspect ratios on heat transfer, and 2D numerical simulation of natural convection flow in a square cavity are performed at Rayleigh numbers 103–106with fixed Prandtl number 0.71 in detail. The numerical results of the Nusselt number along the two sidewalls and the maximum velocities along the horizontal and vertical lines through the cavity center are in good agreement with existing results, which shows the accuracy of the present model.

Keywords: Lattice Boltzmann; variable ratios; natural convection (search for similar items in EconPapers)
Date: 2007
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DOI: 10.1142/S0129183107011820

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