Lattice Boltzmann simulations of axisymmetric natural convection with anisotropic thermal diffusion
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- 作者：Zuo Wang k.izard@stu.xjtu.edu.cn" class="auth_mail" title="E-mail the corresponding author ; Wenfan Zhang zwfsheen@stu.xjtu.edu.cn" class="auth_mail" title="E-mail the corresponding author ; Jiazhong Zhang ; jzzhang@mail.xjtu.edu.cn" class="auth_mail" title="E-mail the corresponding author
- 关键词：Axisymmetric natural convection ; Anisotropic thermal diffusion ; Lattice Boltzmann method
- 刊名：International Journal of Heat and Mass Transfer
- 出版年：2016
- 出版时间：October 2016
- 年：2016
- 卷：101
- 期：Complete
- 页码：1304-1315
- 全文大小：4178 K
文摘
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A multi-relaxation-time lattice Boltzmann model for axisymmetric convection with both isotropic and anisotropic diffusions is proposed.
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Chapman–Enskog analysis demonstrates that the macro cylindrical energy equation can be recovered.
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Numerical results predicted by the present LB model show good agreement with the existing studies.
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Natural convection in a vertical annulus with anisotropic thermal diffusion at different Rayleigh numbers are numerically investigated using the present LB model.
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The diffusion coefficient in the radial direction exerts much more influence on the flow and heat transfer than that in the axial direction in the present physical model.