Motion of a neutrally buoyant circular particle in a partially heating-boundary-driven square cavity: A numerical study

Yiying Zhang, Gang Sun, Hui Pan, Jianghong Zhang, Sihan Zhou, Minxun Zhang and Junjie Hu
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Yiying Zhang: Faculty of Engineering, China University of Geosciences Wuhan 430074, P. R. China
Gang Sun: Faculty of Engineering, China University of Geosciences Wuhan 430074, P. R. China
Hui Pan: ��China Ship Development and Design Center, Wuhan 430064, P. R. China
Jianghong Zhang: ��Hunan CRRC Intelligent Transport Technology Co., Ltd., Changsha 410000, P. R. China
Sihan Zhou: Faculty of Engineering, China University of Geosciences Wuhan 430074, P. R. China
Minxun Zhang: Faculty of Engineering, China University of Geosciences Wuhan 430074, P. R. China
Junjie Hu: Faculty of Engineering, China University of Geosciences Wuhan 430074, P. R. China§School of Mechanical Engineering, Southeast University, Nanjing 211189, P. R. China

International Journal of Modern Physics C (IJMPC), 2025, vol. 36, issue 01, 1-16

Abstract: To understand, predict and control the motion of the solid particles, the motion of a neutrally buoyant circular particle with thermal convection in a square cavity is studied with the lattice Boltzmann method, where the effects of the initial position of the circular particle, Rayleigh number and particle size are investigated. Under the effect of thermal convection, the obvious feature of the motion of the circular particle in the square cavity is the existence of the limit cycle, which is created by the inertia of the circular particle, confinement of the boundaries of the square cavity and centrifugal force. Interestingly, the limit cycle is insensitive to the initial position of the circular particle. The effect of the Rayleigh number on the motion of the circular particle is obvious, with the increase of the Rayleigh number, the limit cycle expands toward the boundaries of the square cavity first, then shrinks and migrates toward the bottom left corner, which is caused by the combined effects of the centrifugal force and vortex behavior. The effect of the particle size on the motion of the circular particle is significant, with the increase of the particle size, the inertia of the circular particle becomes larger, which is more difficultly dragged by the fluid, thus, the limit cycle shrinks toward the bottom left corner of the square cavity.

Keywords: Lattice Boltzmann method; thermal convection; particle–wall interaction; moving boundary treatment (search for similar items in EconPapers)
Date: 2025
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DOI: 10.1142/S012918312450164X

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