Unsteady state gas diffusion in fractal porous media

MA Liang; HE Rong

doi:10.3969/j.issn.0438-1157.2013.09.009

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Unsteady state gas diffusion in fractal porous media

更新时间：2025-12-10

- Unsteady state gas diffusion in fractal porous media
- CIESC Journal Issue 9, Pages: 3139-3144(2013)
- 作者机构：
  
  清华大学热科学与动力工程教育部重点实验室,北京,100084
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2013.09.009
  CLC： 552.2
- Online First：05 September 2013，
  
  Published：05 September 2013
- 稿件说明：
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MA Liang, HE Rong. Unsteady state gas diffusion in fractal porous media[J]. CIESC Journal, 2013, (9): 3139-3144.
DOI：

MA Liang, HE Rong. Unsteady state gas diffusion in fractal porous media[J]. CIESC Journal, 2013, (9): 3139-3144. DOI： 10.3969/j.issn.0438-1157.2013.09.009.

摘要

通过引入平均修正系数修正Fick第二扩散定律得到了描述分形多孔介质气体非稳态扩散的理论方程。基于“塞状流”扩散实验法建立了分形多孔介质非稳态扩散实验系统

对3个孔隙结构不同的分形多孔介质样品进行了非稳态扩散实验

通过实验对理论方程进行验证和修正。结果表明

Fick第二扩散定律不适用于分形多孔介质中气体非稳态扩散

分形多孔介质中气体非稳态扩散存在一定规律

且多孔介质孔隙结构不同其扩散规律不同。

Abstract

An average modified coefficient was used to modify Fick's second law and a theoretical equation was established to describe unsteady state gas diffusion in fractal porous media.The experimental system for unsteady state gas diffusion in fractal porous media was based on the plug flow diffusion.Three different porous medium samples were used to verify and modify the theoretical equation.The results indicate that Fick's second law is not applicable to unsteady state diffusion in fractal porous media

and unsteady state diffusion law in porous media is same under different conditions

and diffusion law in porous media with different pore structures is different.

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