格子-Boltzmann方法模拟多孔介质内自然对流蓄热过程

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摘要以在高温热量存储、太阳能利用和建筑节能中有着广泛应用的多孔蓄热装置为研究对象,基于格子-Boltzmann方法(LBM)的基本原理,建立表征体元尺度(REV)上多孔介质自然对流的热流耦合方程,对多孔介质区域内的定温加热过程进行数值计算,探索了蓄热装置工作效果与多孔介质材料和内部流体特性的关系。分析获得了多孔介质渗透率和工质热膨胀率增大对多孔介质蓄热的强化作用,以及强自然对流作用下温度场分布所出现的不均匀特性。

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关键词 ：多孔介质, 表征体元尺度, 格子-Boltzmann, 自然对流

Abstract：In this paper,heat storage devices with porous media were investigated.These devices were applied in many areas,such as high-temperature heat storage,solar energy and HVAC.Based on the basic principles of Lattice-Boltzmann Method,the equations of heat natural convection in porous media was established on REV scale.The process of constant temperature heating in porous media was calculated by LBM.The results of simulation showed that the effect of heat transfer was strengthened by permeability and thermal expansion porous media,uneven distribution of temperature field was appeared in strong natural convection.

Key words： porous media REV Lattice-Boltzmann natural convection

基金资助:

江西省科技支撑计划项目(2011BBE50031);江西省科学院引进博士项目(2011-YYB-02);江西省科学院国家级预研项目(2011-YGY-01)

引用本文:

万斌；罗成龙. 格子-Boltzmann方法模拟多孔介质内自然对流蓄热过程[J]. 南昌大学学报（工科版）, 2012, 34(02): 165-.
WAN Bin,LUO Cheng-long. Numerical Simulation of Heat Storage Process for Natural Convection in Porous Media with Lattice-Boltzmann Method. , 2012, 34(02): 165-.

链接本文:

http://qks.ncu.edu.cn/Jwk_xbgkb/CN/ 或 http://qks.ncu.edu.cn/Jwk_xbgkb/CN/Y2012/V34/I02/165