The flow in the square cavity with internal obstacles exists widely; thus, investigating the effect of the existence of the obstacles on the flow and the motion of the solid particles is important. To understand, predict, and control the motion of the solid particles, the motion of a neutrally buoyant circular particle in a lid-driven square cavity with an internal circular obstacle is studied with the lattice Boltzmann method, where the effects of the obstacle size, obstacle location, initial position of the circular particle, and Reynolds number are investigated. Under the effect of the obstacle, the flow and the motion of the particle are quite different. Especially, under some cases, no limit cycle is observed, and the particle is captured by the secondary vortex at the lower layer of the square cavity, which is insensitive to the initial position of the circular particle. The effect of the Reynolds number on the motion of the particle is significant, with the increase in the Reynolds number, and the motion of the particle is different obviously. At low Reynolds numbers, the motion of the particle is confined by the primary vortex, which moves along the limit cycle at the upper layer of the square cavity. With the increase in the Reynolds number, the effect of the inertia of the particle becomes stronger, and the particle moves from the primary vortex to the secondary vortex until it is captured by the secondary vortex. At relatively high Reynolds numbers, the primary vortex develops, and the particle is confined by the primary vortex again, forming another limit cycle.
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July 2022
Research Article|
July 07 2022
A neutrally buoyant particle captured by vortex in a lid-driven cavity with an internal obstacle
Jianghong Zhang;
Jianghong Zhang
(Writing – original draft, Writing – review & editing)
1
Faculty of Engineering, China University of Geosciences
, Wuhan 430074, China
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Gang Sun;
Gang Sun
(Validation, Visualization)
1
Faculty of Engineering, China University of Geosciences
, Wuhan 430074, China
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Junjie Hu
;
Junjie Hu
a)
(Investigation, Methodology)
1
Faculty of Engineering, China University of Geosciences
, Wuhan 430074, China
a)Author to whom correspondence should be addressed: [email protected]
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Jian Wu;
Jian Wu
(Resources, Software)
2
Institute of Fluid Physics, China Academy of Engineering Physics
, Mianyang 621900, China
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Maosen Xu
Maosen Xu
(Resources, Software)
3
College of Metrology and Measurement Engineering, China Jiliang University
, Hangzhou 310018, China
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a)Author to whom correspondence should be addressed: [email protected]
Physics of Fluids 34, 073309 (2022)
Article history
Received:
March 31 2022
Accepted:
June 21 2022
Citation
Jianghong Zhang, Gang Sun, Junjie Hu, Jian Wu, Maosen Xu; A neutrally buoyant particle captured by vortex in a lid-driven cavity with an internal obstacle. Physics of Fluids 1 July 2022; 34 (7): 073309. https://doi.org/10.1063/5.0093937
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