A Fractal Orifice-Throat Model for Seepage Characteristics of Multiscale Porous Media  

作　　者：Chunling Wang Yan Gao Lida Zhang Jiaoyan Zhu 

机构地区：[1]College of Science,China Jiliang University,Hangzhou 310018,China

出　　处：《Journal of Mechanics Engineering and Automation》2023年第5期136-142,共7页机械工程与自动化（英文版）

摘　　要：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.

关 键 词：Multiscale porous media fractal geometry Darcy’s law PERMEABILITY orifice-throat model. 

分 类 号：TB3[一般工业技术—材料科学与工程]