Interparticle force and torque on rigid spheroidal particles in acoustophoresis

Wijaya, FB; Sepehrirahnama, S; Lim, KM

Interparticle force and torque on rigid spheroidal particles in acoustophoresis

Wijaya, FB Sepehrirahnama, S

Lim, KM

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Publisher:: ELSEVIER SCIENCE BV
Publication Type:: Journal Article
Citation:: Wave Motion, 2018, 81, pp. 28-45
Issue Date:: 2018-09-01

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Field	Value	Language
dc.contributor.author	Wijaya, FB
dc.contributor.author	Sepehrirahnama, S https://orcid.org/0000-0002-3280-3321
dc.contributor.author	Lim, KM
dc.date.accessioned	2022-09-07T22:09:40Z
dc.date.available	2022-09-07T22:09:40Z
dc.date.issued	2018-09-01
dc.identifier.citation	Wave Motion, 2018, 81, pp. 28-45
dc.identifier.issn	0165-2125
dc.identifier.issn	1878-433X
dc.identifier.uri	http://hdl.handle.net/10453/161493
dc.description.abstract	The movement of the particles in acoustophoresis is driven by the acoustic radiation force acting on the particles. Particles with positive contrast factor tend to agglomerate once they are pushed by the primary force to the vicinity of the pressure node. The main driving force of this agglomeration is the interparticle force. In this study, the boundary element method is used to calculate the interparticle force and torque acting on a pair of spheroidal particles. The numerical results show that the interparticle force is dominant over the primary force when the spheroids are near the pressure nodal plane, similar to the case of two spheres. On contrary, the interparticle torque is insignificant compared to the primary torque, even when the spheroids are close to each other. The results also provide a preliminary study about how biological cells, which are mostly not spherical in shape, agglomerate and orient themselves in the vicinity of the pressure node.
dc.language	English
dc.publisher	ELSEVIER SCIENCE BV
dc.relation.ispartof	Wave Motion
dc.relation.isbasedon	10.1016/j.wavemoti.2018.06.004
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0102 Applied Mathematics, 0203 Classical Physics
dc.subject.classification	Applied Mathematics
dc.title	Interparticle force and torque on rigid spheroidal particles in acoustophoresis
dc.type	Journal Article
utslib.citation.volume	81
utslib.for	0102 Applied Mathematics
utslib.for	0203 Classical Physics
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
utslib.copyright.status	closed_access	*
dc.date.updated	2022-09-07T22:09:38Z
pubs.publication-status	Published
pubs.volume	81

Abstract:

The movement of the particles in acoustophoresis is driven by the acoustic radiation force acting on the particles. Particles with positive contrast factor tend to agglomerate once they are pushed by the primary force to the vicinity of the pressure node. The main driving force of this agglomeration is the interparticle force. In this study, the boundary element method is used to calculate the interparticle force and torque acting on a pair of spheroidal particles. The numerical results show that the interparticle force is dominant over the primary force when the spheroids are near the pressure nodal plane, similar to the case of two spheres. On contrary, the interparticle torque is insignificant compared to the primary torque, even when the spheroids are close to each other. The results also provide a preliminary study about how biological cells, which are mostly not spherical in shape, agglomerate and orient themselves in the vicinity of the pressure node.

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http://hdl.handle.net/10453/161493