Comparative Study of the Flow in a Differentially Heated Cavity Using Thermal Lattice Boltzmann Method

Wei Shan Chen; Di Bo Dong; Zhen Xiu Hou; Sheng Jun Shi

doi:10.4028/www.scientific.net/AMM.300-301.1122

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 300-301Comparative Study of the Flow in a Differentially...

Comparative Study of the Flow in a Differentially Heated Cavity Using Thermal Lattice Boltzmann Method

Abstract:

A D2Q9 thermal lattice Boltzmann model is applied to investigate the flow in a differentially heated cavity. The paper is intended to analysis the physics of heat and mass transfer in a closure cavity filled with air. For three Rayleigh numbers Ra, the aspect ratio K are varied from 1 to 10. Results of validation indicate this algorithm is reliable and easy for implementation. It can be found that the circulation rate of heat driven flow get lower when the K get higher. Also, the Nusselt number Nu tends to be approximated to 1 when K is higher than a critical value, which is depended on the value of Ra.