Lattice Boltzmann simulation of asymptotic longitudinal mass dispersion in reconstructed random porous media

Abstract

To research macroscopic mass transport characteristics of porous media, a lattice Boltzmann method (LBM) approach was utilized to calculate asymptotic longitudinal mass dispersion. In this study, a D2Q9 model with multi‐relaxation‐time (MRT) collision operator, which is appropriate for incompressible flow with a high Péclet number without refining the lattice, was chosen. With respect to the microstructure of porous media, random placement (RP) method was applied to obtain randomly positioned particles. Based on the exhausted numerical results presented in the study, a new correlation of longitudinal mass dispersion was established. By comparing with available experimental data in the literature, reasonable agreements are observed in a wide porosity range from 0.3 to 0.7, indicating the validity of the proposed correlation. © 2018 American Institute of Chemical Engineers AIChE J, 64: 2770–2780, 2018

Inhibition of temperature runaway phenomenon in the Sabatier process using bed dilution structure: LBM‐DEM simulation

“…Compared with other numerical methods, the lattice Boltzmann method (LBM) has advantages in dealing with porous media. Extensive studies 23–26 have affirmed that the LBM approach can flexibly handle irregular boundary conditions in porous media and is not limited by the fluid continuity assumption. Therefore, the present study adopted the LBM to solve the above governing equations.…”