Guyez, Estelle Marie Chantal and Thomas, P. J.. (2009) Effects of particle properties on segregation-band drift in particle-laden rimming flow. Physics of Fluids, Vol.21 (No.3). Article 033301. ISSN 1070-6631

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Abstract

We experimentally study rimming flow of a particle-laden fluid. We begin to investigate the details of the spatiotemporal segregation-band dynamics that were first documented by us elsewhere [E. Guyez and P. J. Thomas, Phys. Rev. Lett. 100, 074501 (2008)]. There exist eight relevant nondimensional parameters that must be expected to affect the drift dynamics of segregation bands in particle-laden rimming flow. Here we summarize results from experiments investigating the effects of three of these parameters that involve the particle size and the particle density. It is shown that two of the parameters are crucial to the initiation of the band drift and that bands become stationary whenever either one of the two parameters adopts values below an associated critical threshold. Based on the physical relevance of the two parameters it is concluded that the initiation of band drift is strongly affected by a competition between capillary forces and gravitational forces. The third nondimensional parameter studied here characterizes the bulk particle concentration and it is found that it controls the band-drift speed in the parameter regime where band drift exists.

Item Type:	Journal Article
Subjects:	T Technology > TJ Mechanical engineering and machinery Q Science > QC Physics
Divisions:	Faculty of Science > Engineering
Journal or Publication Title:	Physics of Fluids
Publisher:	American Institute of Physics
ISSN:	1070-6631
Date:	March 2009
Volume:	Vol.21
Number:	No.3
Number of Pages:	10
Page Range:	Article 033301
Identification Number:	10.1063/1.3081046
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
URI:	http://wrap.warwick.ac.uk/id/eprint/28189

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