Dynamics of a pair of neutrally buoyant circular particles with different sizes in a lid-driven square cavity

Junjie Hu, Hui Pan, Fangqing Zhang, Huili Wang, Gaojie Liu and Yongyu Wang
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Junjie Hu: 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
Fangqing Zhang: ��School of Power and Mechanical Engineering, Wuhan University, Wuhan 430074, P. R. China
Huili Wang: �School of Mathematical and Physical Sciences, Wuhan Textile University, Wuhan 430074, P. R. China
Gaojie Liu: �School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, P. R. China
Yongyu Wang: Faculty of Engineering, China University of Geosciences, Wuhan 430074, P. R. China

International Journal of Modern Physics C (IJMPC), 2022, vol. 33, issue 01, 1-16

Abstract: The solid particles with different sizes exist widely, like cell separation, food processing, water treatment, thus, investigating the motion of the solid particles with different sizes is important. This study investigates the motion of a pair of neutrally buoyant circular particles with different sizes in a lid-driven square cavity using the lattice Boltzmann method. The motion of the circular particles with different sizes and that of the circular particles with identical sizes are quite different. The steady trajectories of the circular particles with identical sizes are identical, which is not affected by the Reynolds number. Differently, the circular particles with different sizes orbit along different steady trajectories, namely, the steady trajectory of the small particle is closer to the walls of the square cavity, while that of the large particle shrinks toward the center of the square cavity, which may provide us a possible method to separate them. However, it is not always effective, if the Reynolds number is low, the velocity difference between the circular particles with different sizes is small, which may fail to separate them completely.

Keywords: Circular particles with different sizes; lattice Boltzmann method; lid-driven square cavity; limit cycle (search for similar items in EconPapers)
Date: 2022
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DOI: 10.1142/S012918312250005X

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