LBM Simulations of Matrix Diffusion with Sorption

摘要

Matrix diffusion is a phenomenon in which tracer particles convected along a flow channel can diffuse into porous walls of the channel, and it causes a delay and broadening of the breakthrough curve of the tracer pulse. The lattice-Boltzmann method is a popular tool for simulating flow through porous materials, and for similar reasons it is an attractive tool for modeling the matrix diffusion phenomenon. In this work sorption of the tracer particles is also included in such simulations with this method. The proposed approach is compared with conventional methods for modeling matrix diffusion phenomena.