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Particle Dynamics in a Low-Reynolds-Number Fluid Under Spherical Confinement
Gaofeng Chen1,2, Xikai Jiang1,2,*
1 State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing, 100190,
China
2 School of Engineering Science, University of Chinese Academy of Sciences, Beijing, 100049, China
* Corresponding Author: Xikai Jiang. Email:
The International Conference on Computational & Experimental Engineering and Sciences 2023, 25(2), 1-1. https://doi.org/10.32604/icces.2023.09877
Abstract
Dynamics of a single particle suspended in a low-Reynolds-number fluid under spherical confinement was
studied numerically. We calculated hydrodynamic mobilities of a sphere, a prolate spheroid, and an oblate
spheroid parallel and transverse to particle-cavity line of centres. The mobilities show maximum in the
cavity centre and decay as the particle moves towards the no-slip wall. For prolate and oblate spheroids,
their mobilities are also affected by the angle between particle's axis of revolution and the particle-cavity
line of centres due to particle anisotropy. It was observed that the effect of particle anisotropy becomes
stronger as the confinement level increases. When the external force on the particle is not parallel or
transverse to particle-cavity line of centres, a drift velocity perpendicular to the force occurs because of the
confinement-induced anisotropy of the mobility in the cavity. The normalized drift velocity depends on
particle location, size, shape, and the orientation of the nonspherical particle. We also studied the motion of
a non-neutrally buoyant particle under external forces in a rotating flow inside the cavity. Cooperation
between the external force, rotation-induced centrifugal or centripetal force, and the force from particlewall interaction leads to multiple modes of particle motion. Fundamental understanding of single-particle
dynamics in this work forms the basis for studying more complex particle dynamics in intracellular
transport, and can guide particle manipulation in microfluidic applications ranging from droplet-based
microreactors to microfluidic encapsulation.
Keywords
Cite This Article
APA Style
Chen, G., Jiang, X. (2023). Particle dynamics in a low-reynolds-number fluid under spherical confinement. The International Conference on Computational & Experimental Engineering and Sciences, 25(2), 1-1. https://doi.org/10.32604/icces.2023.09877
Vancouver Style
Chen G, Jiang X. Particle dynamics in a low-reynolds-number fluid under spherical confinement. Int Conf Comput Exp Eng Sciences . 2023;25(2):1-1 https://doi.org/10.32604/icces.2023.09877
IEEE Style
G. Chen and X. Jiang, "Particle Dynamics in a Low-Reynolds-Number Fluid Under Spherical Confinement," Int. Conf. Comput. Exp. Eng. Sciences , vol. 25, no. 2, pp. 1-1. 2023. https://doi.org/10.32604/icces.2023.09877