Pore-Scale Simulation of Fluid Flow Through Deformable Porous Media Using Immersed Boundary Coupled Lattice Boltzmann Method

Abstract

The interaction between the fluid flow and the deformable porous media is crucial in the applications of adsorption/absorption. The immersed boundary coupled lattice Boltzmann method is used in this study. The spring constant k of porous skeleton is introduced to consider the deformation effects. Subsequently, the evolutions of deformation of porous skeleton and hydrodynamic characteristics of fluid with k and Reynolds number are elucidated. The trend of deformation of porous skeleton appears as “concave front and convex back.” Moreover, the porosity of deformable porous media decreases gradually with the deformation growing. Meanwhile, the resistance of fluid flow increases due to the growing deformation of the porous skeleton. The larger k and Re contribute to the smaller drag coefficient. The deformation of the porous skeleton accelerates the detachment of the fluid boundary layer, and vortex patterns transfer from 2S to 2P mode with Reynolds number increasing when k = 0.05. Larger deformation leads to the higher pressure drop. The pressure drop for k = 0.01 is 21.7% higher than k = 0.05.