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Fluctuations and stratification in sedimentation of dilute suspensions of spheres

Phys. Fluids 21, 093304 (2009); doi:10.1063/1.3231834

Published 24 September 2009

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Daniel Chehata Gómez,1 Laurence Bergougnoux,1 Élisabeth Guazzelli,1 and John Hinch2
1IUSTI CNRS UMR 6595, Polytech'Marseille, Aix-Marseille Université (U1), 5 Rue Enrico Fermi, 13453 Marseille Cedex 13, France
2DAMTP, University of Cambridge, Wilberforce Road, Cambridge CB3 0WA, United Kingdom
We have tested in experiments and simulations whether stratification can control velocity fluctuations in suspensions of sedimenting spheres. The initial value and early decay of the velocity fluctuations are not affected by stratification. On the other hand, in the descending front where the stratification is strong and well defined, the velocity fluctuations are inhibited according to a previously proposed scaling. In between, after the initial decay and before the arrival of the front, the local value of the stratification does not always play a role. ©2009 American Institute of Physics
History: Received 8 June 2009; accepted 3 August 2009; published 24 September 2009
Permalink: http://link.aip.org/link/?PHFLE6/21/093304/1
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KEYWORDS and PACS

Keywords
PACS
  • 47.57.ef
    Sedimentation and migration in suspensions (fluid dynamics)
  • 47.55.Hd
    Stratified flows
  • 82.70.Kj
    Emulsions and suspensions
  • YEAR: 2009

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PUBLICATION DATA

ISSN:
1070-6631 (print)   1089-7666 (online)
Publisher:
AIP is a member of CrossRef AIP

REFERENCES (19)
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