基于LBM-FVM的多尺度凸型流道流动与传热研究

Research on Flow and Heat Transfer in Multi-scale Convex Channel Based on LBM-FVM

中文关键词: 格子玻尔兹曼法  有限体积法  凸型流道  多尺度  流动与传热

英文关键词: lattice Boltzmann method  finite volume method  convex channel  multi-scale  fluid and heat transfer

中文摘要:

      文中采用格子玻尔兹曼法（Lattice Boltzmann Method, LBM）与有限体积法（Finite Volume Method, FVM）对宏微观尺度的凸型结构进行流动与传热分析，构建多尺度耦合模型，提出基于重构算子的LBM-FVM分区计算的格子玻尔兹曼法与有限体积法耦合的算法（Coupling Algorithm between Finite Volume Method and Lattice Boltzmann Method, CFVLBM），研究不同流体（空气、氮气和氢气）、不同管径比、不同温度、不同流量下的多尺度流动传热性能，并与采用LBM和FLUENT软件计算所得分析结果进行对比，验证了方法的有效性，并获得了凸型结构的跨尺度流速和温度分布。

英文摘要:

      The flow and heat transfer of convex structures with macro and micro scales are analyzed with lattice Boltzmann method (LBM) and finite volume method (FVM) in this paper. A multi-scale coupling model is constructed and the partitionally calculated coupling algorithm between finite volume method and lattice Boltzmann method (CFVLBM) based on the reconstruction operator is presented to study the heat transfer performance of multi-scale flow under different diameter ratios, different fluid (air, nitrogen and hydrogen), different temperatures and different flows. Compared with the computational analysis results of LBM and FLUENT software, the effectiveness of the method is verified and the cross-scale flow rate and temperature distribution of the convex structure are obtained.