Work

Deformation dependent permeability from variationally consistent homogenization

Year: 2025

Type: article

Abstract: In this article, the influence of large deformations on the effective permeability of a bicontinuous porous material is investigated. On the fine‐scale, Neo–Hooke hyperelasticity is considered for the solid skeleton. In a third medium approach, we model the pore space as filled with a softer material of the same type. Fluid flow through the deformed pores is expressed in terms of a Stokes' flow model. The influence of the pore pressure on the deformation is neglected, resulting in a one‐way coupling which allows for a sequential solution of the two physical problems. The framework of Variationally Consistent Homogenization is used to derive a two‐scale formulation based on a Representative Volume Element (RVE) characterizing the microstructure. Finally, a two‐step procedure to compute the deformation dependent permeability is established: Firstly, the deformation of the RVE for a given macroscale deformation gradient is computed. Secondly, sensitivities for the fluid flow through the deformed RVE are computed and used to determine the effective permeability tensor. A numerical study is conducted for sets of RVEs with the same material parameters and different porosity. For the case of uniaxial compression, a significant influence of the deformation on the effective permeability is observed: For a macroscale compression of , the effective permeability orthogonal to the compression direction is reduced by almost .

Source: GAMM-Mitteilungen

DOI: 10.1002/gamm.70010

Authors: David René Rollin, Fredrik Larsson, Kenneth Runesson, Ralf Jänicke

Institutions: Technische Universität Braunschweig, Chalmers University of Technology

Language: English

Topic: Advanced Mathematical Modeling in Engineering

Subfield: Computational Theory and Mathematics

Field: Computer Science

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,140

Funder: Vetenskapsrådet