@Article{icces.2023.09877,
AUTHOR = {Gaofeng Chen, Xikai Jiang},
TITLE = {Particle	Dynamics	in	a	Low-Reynolds-Number	Fluid	Under	Spherical	 Confinement},
JOURNAL = {The International Conference on Computational \& Experimental Engineering and Sciences},
VOLUME = {25},
YEAR = {2023},
NUMBER = {2},
PAGES = {1--1},
URL = {http://www.techscience.com/icces/v25n2/53820},
ISSN = {1933-2815},
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.},
DOI = {10.32604/icces.2023.09877}
}