Simulation of particles motion, deposition and loading in a channel with two built in square obstacles by Homogenized Lattice Boltzmann method

Abstract

Abstract Loading of particles occurs in some industries and nature, such as slurry flow, aeolian landforms and also in filters. It can cause some difficulty in normal operation of devices and systems. Therefore, its study is necessary. In this research the motion, rolling, deposition and loading of some particle in a Poiseuille flow channel with two built in square blocks are simulated in details. For validation two neutrally buoyant particles movement were simulated and those trajectory and equilibrium positions were compared with the pervious works. A good agreement between them was observed. Next some particles at the inlet of a channel with two obstacles were released under a Poiseuille flow. The trajectory of particles specially when those are in the position near the deposition, and also those rotational angles were obtained. It is seen that when the particle collides to the blocks walls, they suddenly change the rotational direction. Also, it is seen that the particles near the deposition when trapped between the other particles continue those movements with zigzag, roundtrip, rise and fall until they stop. It is observed that the most loading of particles between two blocks occurs for particles with medium density. Also, it is seen that the particles travel the most length of their path by sliding.