热质双扩散与流固共轭传热及吸附的LBM模拟

doi:10.19596/j.cnki.1001-246x.7790

计算物理 ›› 2019, Vol. 36 ›› Issue (1): 60-68.DOI: 10.19596/j.cnki.1001-246x.7790

热质双扩散与流固共轭传热及吸附的LBM模拟

罗祝清, 娄钦, 徐洪涛, 杨茉

上海理工大学能源与动力工程学院, 上海 200093

收稿日期:2017-10-30 修回日期:2017-12-05 出版日期:2019-01-25 发布日期:2019-01-25
通讯作者: 徐洪涛(1976-),男,烟台,副教授,主要从事传热传质及数值模拟技术研究,E-mail:htxu@usst.edu.cn
作者简介:罗祝清(1992-),女,硕士生,主要从事多孔介质传热传质数值模拟研究,E-mail:925756552@qq.com

LBM Simulation of Heat and Mass Double Diffusion, Fluid-Solid Conjugate Heat Transfer and Adsorption

LUO Zhuqing, LOU Qin, XU Hongtao, YANG Mo

School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China

Received:2017-10-30 Revised:2017-12-05 Online:2019-01-25 Published:2019-01-25

摘要/Abstract

摘要： 采用格子Boltzmann方法，基于孔隙尺度，对填有均匀介质的复合方腔顶盖驱动双扩散混合对流及流固共轭传热、吸附进行数值模拟.在孔隙率ε=0.79，普朗特数Pr=0.7，格拉晓夫数Gr=10⁴和路易斯数Le=1.0时，就不同浮升力比（-100≤Br≤100）和吸附率常数（0.001≤k₁≤0.005）对方腔内部热质传输的影响进行比较.给出流线、等温线、等浓度线、平均努赛尔数Nu_av、舍伍德数Sh_av和吸附量等.结果表明Br通过改变介质所处流场的浓度分布影响吸附，而k₁的增加显著地提高吸附效率和吸附能力.

关键词: 格子玻尔兹曼方法, 双扩散, 流固共轭传热, 吸附, 均匀介质

Abstract: We adopted lattice Boltzmann method to simulate double diffusion mixed convection, fluid-solid conjugate heat transfer and adsorption process in a lid-driven composite enclosure filled with homogeneous medium at pore scale. Influences of buoyancy ratio Br (-100 ≤ Br ≤ 100) and adsorption rate constant k₁ (0.001 ≤ k₁ ≤ 0.005) on characteristics of heat and mass transfer were compared at porosity ε=0.79, Prandtl number Pr=0.7, Grashof number Gr=10⁴ and Lewis number Le=1.0. Streamlines, isotherms, isoconcentrations, adsorption capacity (C_S), average Nusselt number Nu_av and Sherwood number Sh_av of the left heated wall under different parameters were discussed in detail. It shows that Br affects adsorption by changing concentration distribution around medium in flow field; Increasing k₁ improves significantly adsorption efficiency and adsorption capacity.

Key words: Lattice Boltzmann method, double diffusion, solid-fluid conjugate heat transfer, adsorption, homogeneous medium

中图分类号:

TK121

罗祝清, 娄钦, 徐洪涛, 杨茉. 热质双扩散与流固共轭传热及吸附的LBM模拟[J]. 计算物理, 2019, 36(1): 60-68.

LUO Zhuqing, LOU Qin, XU Hongtao, YANG Mo. LBM Simulation of Heat and Mass Double Diffusion, Fluid-Solid Conjugate Heat Transfer and Adsorption[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2019, 36(1): 60-68.

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热质双扩散与流固共轭传热及吸附的LBM模拟

LBM Simulation of Heat and Mass Double Diffusion, Fluid-Solid Conjugate Heat Transfer and Adsorption

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