Numerical investigation on motion of an ellipsoidal particle inside confined microcavity flow

• 作者: Tianrou Miao Zuoli Xiao
• 来源期刊: 力学快报（英文版）
• 年，卷（期）: 2021,（1）
• 页码范围: 47-51
• 页数: 5页
• 语种: 英文
• DOI: 10.3969/j.issn.2095-0349.2021.01.009

摘要

The behaviors of a neutrally buoyant ellipsoidal particle in vortical flow confined by a microcavity are numerically studied using the Lattice-Boltzmann method. For specific initial position, an isolated ellipsoid may develop a stable limit cycle orbit inside microcavity due to the interaction between particle and the carrier flow. It is observed that ellipsoidal particles of different shapes exhibit two different stable rotational modes depending on the initial orientation and lateral position. A prolate spheroid tends to enter a tumbling mode whereas an oblate spheroid is apt to achieve a rolling mode. The evolution of rotational velocities along the stable orbit is also analyzed for particles of different shapes.