A Simplified Permeability Model for Porous Media with High Porosity

摘要

In order to get a permeability model for porous media wlth hlgh porosity,a numericalexperiment was conducted. In which 25 regular porous media models with different poroslty arestructured by grains of six size and different distance between them and all of the porosity of the porousmedia models is higher than 0．6,the minimum 0．6094,and maximum 0．8264．By simulating the fluidsflowing in a porous media model. The velocity field in it can be obtained,and flux per thickness can begot by integral the velocity on the outlet boundary. Then,the permeability of this porous media modelcan be calculated using Darcy's law. The results show that the permeability of porous media with highporosity exponentially increases along with the increase of porosity,and the higher the porosity is,thequicker the permeability increases．Permeability is also increases with the increase of grams size.Westill adopt the relationship given by Carman-Kozeny theory and thus proposed a simplified permeabilitymodel for porous media with high porosity. This model will have implications to design andoptimization of porous material with high porosity．