Study of migration and deposition of micro particles in porous media by Lattice-Boltzmann Method

Abstract

The direct-forcing immersed boundary-lattice Boltzmann (IB-LBM) method is used to simulate the migration and deposition of micro particles at the interface of porous media. Single particle deposition and double particles drafting, kissing and tumbling (DKT) motion was respectively simulated to validate the calculation program by comparing with the previous calculation results. Based on this, the effects of the concentration and density of suspended particles on the deposition characteristics were studied. The results indicate that the amount of micro particles deposited in porous media increases as particle density increases. When the particle concentration is constant, the larger the particle density, the earlier the clogging occurs. Besides, micro particles with small concentration are easily migrated through the interfaces into the porous medium, and the amount of particle deposition is not positively related to the particle concentration.