Numerical simulation for influence of pore characteristics on gas diffusion in porous media

doi:10.3969/j.issn.0438-1157.2013.04.017

CIESC Journal ›› 2013, Vol. 64 ›› Issue (4): 1242-1248.DOI: 10.3969/j.issn.0438-1157.2013.04.017

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Numerical simulation for influence of pore characteristics on gas diffusion in porous media

LI Sha¹, YONG Yumei¹, YIN Xiaolong², YANG Chao¹

1. Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
2. Petroleum Engineering Department, Colorado School of Mines, Golden, Colorado 80402, USA

Received:2012-07-17 Revised:2012-09-18 Online:2013-04-05 Published:2013-04-05
Supported by:
supported by the National Natural Science Foundation of China(20976177, 20990224, 21276256),the National Science Fund for Distinguished Young Scholars(21025627) and the National Basic Research Program of China(2009CB623406).

多孔介质的孔隙特性对气体扩散过程影响的直接数值模拟

李莎¹, 雍玉梅¹, 尹小龙², 杨超¹

1. 中国科学院过程工程研究所,北京100190;
2. 美国科罗拉多矿业大学石油工程系, Golden, CO 80402

通讯作者: 雍玉梅
作者简介:李莎(1987—),女,硕士研究生。
基金资助:
国家自然科学基金项目(20976177, 20990224, 21276256);国家杰出青年科学基金项目(21025627);国家重点基础研究发展计划项目(2009CB623406)。

Abstract

Abstract: Micro-structure of porous medium that approximates natural porous medium is generated stochastically by numerical method.Numerical simulation of gas diffusion in porous media is implemented with LTRT lattice Boltzmann method to investigate the effects of pore characteristics on diffusion process.It is demonstrated that diffusion processes are quite different in different porous micro-structures with the same porosity.The results also show that the dimension of the width of channels influences the diffusion.The diffusion rates increase as the channel width increases.The effect resulted from the variation of channel width and porosity in the diffusion process is far less than that for different pore structures.The influence caused by the variation of radii of filleted corners is little.These explorations provide theoretical basis and statistical support for the generation of porous media and the design and optimization of the pore characteristics of micro-reactor.

Key words: porous media, micro-structure, diffusion, lattice Boltzmann method

关键词: 多孔介质, 微结构, 扩散, 格子Boltzmann方法

CLC Number:

TQ022.1

LI Sha, YONG Yumei, YIN Xiaolong, YANG Chao. Numerical simulation for influence of pore characteristics on gas diffusion in porous media[J]. CIESC Journal, 2013, 64(4): 1242-1248.

李莎, 雍玉梅, 尹小龙, 杨超. 多孔介质的孔隙特性对气体扩散过程影响的直接数值模拟[J]. 化工学报, 2013, 64(4): 1242-1248.

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Numerical simulation for influence of pore characteristics on gas diffusion in porous media

多孔介质的孔隙特性对气体扩散过程影响的直接数值模拟

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