基于三维CFD-DEM的多孔介质流场数值模拟
摘要
In numerical simulation the microscopic flow in porous media was combined with the macroscopic porous media model based on the Darcy law. The 3D CFD-DEM was applied to the microstructure of porous media to figure out the inertial resistance and the viscous resistance. Then, the resistances obtained with the CFD-DEM were introduced in the porous media model based on the Darcy law. The Voronoi polyhedron was used in mesh generation, so the porosity of each mesh cell was calculated precisely. In this way, larger-scale fluid fields in porous media can be computed efficiently. For engineering applications, the proposed method balances between accuracy and efficiency of multi-scale methods, effectively saving the experiment cost and improving the computation reliability.