International Journal of Multiphase Flow, Vol.71, 74-82, 2015
Modeling the macroscopic behavior of saturated deformable porous media using direct numerical simulations
The behavior of saturated deformable porous media is investigated under compressive loading using direct numerical simulations. A parallel hybrid lattice Boltzmann and Finite Element method is employed to perform the numerical simulations. The efficiency and inherently parallel nature of LBM coupled with the robust FEM lends itself as a powerful tool to carry out the complex and computationally demanding direct numerical simulations of saturated deformable porous media. Model porous media made up of spheres in a simple cubic arrangement are used in this work. The deformational response of such model geometries is compared to an existing analytical solution. For the comparison, the bulk properties of the macroscopic porous medium are obtained through the single phase properties of the constituents. The deformational behavior is seen to match the analytical solution closely. Thus it is found that the macroscopic behavior of a generic porous medium can be recovered through model porous medium constructed with simplified geometries. As a result, it is also seen that the LBM-FEM method is an accurate and suitable method for further investigations on porous media, particularly in nonhomogeneous and anisotropic deformable porous media. (C) 2015 Elsevier Ltd. All rights reserved.
Keywords:Saturated deformable porous media;Lattice Boltzmann method;Finite element method;Fluid-structure interaction;Direct numerical simulations