Flow Patterns in the Sedimentation of a Capsule-Shaped Particle

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2012,（8）
• 页码范围: 160-163
• 页数: 4页
• 语种: 英文
• DOI: 10.1088/0256-307X/29/8/084703

摘要

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 patterns 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 patterns 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.