化工学报Issue(3)：870-878,9.DOI:10.3969/j.issn.0438-1157.2014.03.015
大孔隙率多孔介质内热弥散现象数值模拟
Numerical simulation of thermal dispersion in porous media with large porosity
摘要
Abstract
The structure of porous media with large porosity is described by a spatial periodic Weaire-Phelan model, which is built by the Surface Evolver software, and the application range of this model is determined by comparison of experimental data and simulation result for thermal effective conductivity. Based on the model, numerical computations on two specimens, with air and water as working fluids and aluminum T-6201 as solid matrix, are conducted. The effects of working parameters, such as pore size, Darcy velocity and ratio of thermal diffusion coefficient of fluid to solid, on the thermal dispersion are discussed. The simulation result shows that smaller diameter and stronger dispersion result in a more sensible dependency on thermal physical properties. In addition, the transversal component is far smaller than the longitudinal one. Empirical correlations for the longitudinal and transversal thermal dispersion are obtained in term of Peclet number.关键词
多孔介质/数值模拟/模型/热弥散/孔隙率Key words
porous medium/numerical simulation/model/thermal dispersion/porosity分类
能源科技引用本文复制引用
陈仲山,解茂昭,刘宏升..大孔隙率多孔介质内热弥散现象数值模拟[J].化工学报,2014,(3):870-878,9.基金项目
国家自然科学基金项目(51176021).@@@@supported by the National Natural Science Foundation of China(51176021) （51176021）
