Research on the effective gas diffusion coefficient in dry porous media embedded with a fractal-like tree network

Qian Zheng, Jian Xu, Bin Yang and Boming Yu

Physica A: Statistical Mechanics and its Applications, 2013, vol. 392, issue 6, 1557-1566

Abstract: A theoretical model for the relative gas diffusion coefficient in dry porous media embedded with a Y-shaped fractal-like tree network is presented under the combination of bulk diffusion and Knudsen diffusion. The proposed model is expressed as a function of the length ratio, the diameter ratio, the branching level, the branching angle and the relative areal porosity. The effect of the structural parameters of the medium and the tortuosity on gas diffusion is analyzed in detail. Model predictions are compared with available experimental data, and a fair agreement between them is found.

Keywords: Fractal-like tree networks; Gas diffusion coefficient; Porous medium (search for similar items in EconPapers)
Date: 2013
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Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:392:y:2013:i:6:p:1557-1566

DOI: 10.1016/j.physa.2012.12.003

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