Axisymmetric thermal-lattice Boltzmann method for Rayleigh-Benard convection with anisotropic thermal diffusion

被引：7
|
作者：
Gawas, Amitkumar S. [1 ]
Patil, Dhiraj, V [1 ]
机构：
[1] Indian Inst Technol Dharwad, Dept Mech Engn, Dharwad 580011, Karnataka, India
来源：
JOURNAL OF COMPUTATIONAL SCIENCE | 2020年 / 45卷
关键词：
Rayleigh-Bernard convection; Axisymmetric; LB-MRT; Anisotropy; NATURAL-CONVECTION; GAS; DISPERSION; SIMULATION; LAYER;
D O I：
10.1016/j.jocs.2020.101185
中图分类号：
TP39 [计算机的应用];
学科分类号：
081203 ; 0835 ;
摘要：
Rayleigh-Benard convection (RBC) with anisotropic thermal diffusion inside a cylindrical cavity is investigated using the axisymmetric thermal-lattice Boltzmann method with MRT collisions. The axisymmetric approach for cylindrical geometries reduces the overall computational requirements, however, is valid for a certain range of governing non-dimensional number, here the Rayleigh number. The D2Q9 model is used with two distribution functions one for the flow-field and another for the temperature-field. The new results are presented for RBC in a cylindrical cavity for cavity aspect ratios (ratio of height (H) to the radius (R) of the cylinder Gamma = H/R) 1 and 2 up to Rayleigh number 10,000. (C) 2020 Elsevier B.V. All rights reserved.
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页数：8
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