论文部分内容阅读
The main objective of this study is to numerically investigate the settling of a capsule-shaped particle in an infinitely long channel by the newly developed LB-DF/FD method.This work will focus on the effects of the particle orientation and particle/fluid density ratio on the flow pattes during sedimentation.As the density ratio is varied,our results show that there are four distinct modes of sedimentation:vertical sedimentation,horizontal sedimentation,periodically oscillating sedimentation and chaotic mode where the particle is released from the center of the domain with an initial inclination of π/4 to break the symmetry.Furthermore,we also numerically investigate the flow pattes where the particle is released with an initial inclination of 0,π/6,π/3 and π/2.We conduct a detailed study on the effects of density ratio on the transition from the vertical sedimentation mode to horizontal sedimentation mode.