Numerical simulations of suspension motion of irregular shaped particles via the lattice Boltzmann method
悬浮颗粒运动的格子Boltzmann数值模拟

In this study,we combine the Newtonian mechanics with lattice Boltzmann method(LBM) to simulate the motion of irregular shaped particle suspensions.A moving boundary method to follow the motion of moving particles is used,which can not only trace the motion of particles for a long time,but also increase the speed of computation and decrease the usage of computer memory.We also analyze in detail of the forces acted on the elliptical and irregular particle suspensions.In the study,with the comparison of our results of the motion of elliptical particles with others results of the motion of long square particles,reasonable physical explanations of the complex phenomena are found,which can be used as a guide to understand the motion of particle suspensions with more general irregular shapes.It is shown that the lattice Boltzmann method is as accurate as the finite element method in the simulation of motion of particle suspensions and has a lot of advantages,such as fast and can handle complex boundaries easily.The code of LBM is much shorter than other CFD methods and is particularly suitable for large scale parallel computation.