Lattice BGK simulations of the double diffusive mixed convection in an enclosure with different outlet locations

Lattice BGK simulations of the double diffusive mixed convection in an enclosure with different outlet locations
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具有不同出口位置的外壳中双扩散混合对流的晶格 BGK 模拟

DOI:
10.1016/j.ijheatmasstransfer.2015.08.100
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发表时间:
2016
影响因子:
5.2
通讯作者:
M. Yang
M. Yang
中科院分区:
工程技术2区
文献类型:
--
作者:
J. Chen;Q. Lou;Z.R. Yan;M. Yang

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本文采用温度-浓度格子Bhatnagar-Gross-Krook(TCLBGK)模型,研究了具有不同出口位置的封闭腔内加热圆柱体周围的双扩散混合对流。在该模型中,速度、温度和浓度的分布是通过求解三个独立的LBGK方程得到的,这些方程组合成一个耦合方程。在Richardson数为1.0和Prandtl数Pr值分别为1.0和0.7时,对Lewis数Le、浮力比Brand出口位置对双扩散混合对流的影响进行了参数研究。结果以封闭空间内加热圆柱体周围的等温线、流线、等浓度、平均Nusselt数和Sherwood数的形式给出。
This article adopts a temperature-concentration lattice Bhatnagar–Gross–Krook (TCLBGK) model to investigate the double diffusive mixed convection around a heated cylinder in an enclosure with different outlet locations. In this model, the distributions of velocity, temperature and concentration are derived by solving three independent LBGK equations which are combined into a coupled equation. A parametric study illustrating the influence of Lewis numberLe, buoyancy ratioBrand outlet locations on the double diffusive mixed convection is performed while Richardson numberRiand Prandtl numberPrare set to be 1.0 and 0.7 respectively. Results are presented in terms of isotherms, streamlines, isoconcentrations, average Nusselt and Sherwood numbers around the heated cylinder in the enclosure.
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