Zoueshtiagh, F., Thomas, P. J. (Peter J.), Thomy, V. and Merlen, A.. (2008) Micrometric granular ripple patterns in a capillary tube. Physical Review Letters, Vol.100 (No.5). Article 054501. ISSN 0031-9007

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Abstract

The oscillatory motion of a fluid carrying micron-sized particles inside a capillary tube is investigated experimentally. It is found that initially uniformly distributed particles can segregate and accumulate to form regularly spaced micron-sized particle clusters. The wavelength of the microclusters is compared to data for macroscale sand-ripple patterns and found to obey the same universal scaling as these. A dimensional analysis is performed that confirms the universality of the experimentally observed scaling. The experimental data for the microripple clusters further suggest the existence of a minimum particle length scale for which patterns can form and below which the Brownian motion associated with the molecules of the matrix fluid inhibits pattern formation.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics T Technology > TJ Mechanical engineering and machinery
Divisions:	Faculty of Science > Engineering Faculty of Science > Physics
Journal or Publication Title:	Physical Review Letters
Publisher:	American Physical Society
ISSN:	0031-9007
Date:	8 February 2008
Volume:	Vol.100
Number:	No.5
Number of Pages:	4
Page Range:	Article 054501
Identification Number:	10.1103/PhysRevLett.100.054501
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
URI:	http://wrap.warwick.ac.uk/id/eprint/30541

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