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Article
A Fractal Orifice-Throat Model for Seepage Characteristics of Multiscale Porous Media
Author(s)
Chunling Wang, Yan Gao, Lida Zhang and Jiaoyan Zhu
Full-Text PDF XML 315 Views
DOI:10.17265/2159-5275/2023.05.002
Affiliation(s)
College of Science, China Jiliang University, Hangzhou 310018, China
ABSTRACT
The seepage
characteristics of multiscale porous media is of considerable significance in
many scientific and engineering fields. The Darcy permeability is one of the
key macroscopic physical properties to characterize the seepage capacity of
porous media. Therefore, based on the statistically fractal scaling law of
porous media, fractal geometry is applied to model the multiscale pore
structures. And a two-dimensional fractal orifice-throat model with multiscale
and tortuous characteristics is proposed for the seepage flow through porous
media. The analytical expression for Darcy permeability of porous media is
derived, which is validated by comparing with available experimental data. The
results show that the Darcy permeability is significantly influenced by
porosity, orifice-throat fractal dimension, minimum to maximum diameter
ratio, orifice-throat ratio and tortuosity fractal
dimension. The present results are helpful for understanding the seepage
mechanism of multiscale porous media, and may provide theoretical basis for
unconventional oil and gas exploration and development, porous phase transition
energy storage composites, CO2 geological sequestration,
environmental protection and nuclear waste treatment, etc.
KEYWORDS
Multiscale porous media, fractal geometry, Darcy’s law, permeability, orifice-throat model.
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