Numerical simulation of thermal dispersion in porous media with large porosity

CHEN Zhongshan; XIE Maozhao; LIU Hongsheng

doi:10.3969/j.issn.0438-1157.2014.03.015

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Numerical simulation of thermal dispersion in porous media with large porosity

更新时间：2025-12-10

- Numerical simulation of thermal dispersion in porous media with large porosity
- CIESC Journal Issue 3, Pages: 870-878(2014)
- 作者机构：
  
  大连理工大学能源与动力工程学院,辽宁,大连,116024
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2014.03.015
  CLC： K124
- Online First：05 March 2014，
  
  Published：05 March 2014
- 稿件说明：
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CHEN Zhongshan, XIE Maozhao, LIU Hongsheng. Numerical simulation of thermal dispersion in porous media with large porosity[J]. CIESC Journal, 2014, (3): 870-878.
DOI：

CHEN Zhongshan, XIE Maozhao, LIU Hongsheng. Numerical simulation of thermal dispersion in porous media with large porosity[J]. CIESC Journal, 2014, (3): 870-878. DOI： 10.3969/j.issn.0438-1157.2014.03.015.

摘要

采用Surface Evolver泡沫演化动力学软件构建理想的大孔隙率多孔介质的几何模型：Weaire-Phelan模型。通过对有效热导率的计算，确定了该模型的适用范围。在此基础上优选两组几何参数作为计算依据，流体相分别采用空气和水，固体相为铝T-6201，通过数值模拟，研究了孔径、Darcy速度和流-固热扩散系数比的影响。数值计算结果表明：孔径越小，热弥散效应越强，流体本身的热物性对弥散的影响越明显；横向分量远小于纵向分量。当工质为气体时，横向分量可以忽略不计，最后得到了计算纵向与横向热弥散系数的经验关联式。

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.

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