Micrometric granular ripple patterns in a capillary tube
Zoueshtiagh, Farzam, Thomas, P. J. (Peter J.), Thomy, V. and Merlen, A.. (2008) Micrometric granular ripple patterns in a capillary tube. Physical Review Letters, Volume 100 (Number 5). Article 054501. ISSN 0031-9007Full text not available from this repository.
Official URL: http://dx.doi.org/10.1103/PhysRevLett.100.054501
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
|Library of Congress Subject Headings (LCSH):||Microfluidic devices, Field-flow fractionation, Particles, Brownian movements, Capillarity|
|Journal or Publication Title:||Physical Review Letters|
|Publisher:||American Physical Society|
|Official Date:||8 February 2008|
|Number of Pages:||4|
|Page Range:||Article 054501|
|Access rights to Published version:||Restricted or Subscription Access|
 H. A. Stone and S. Kim, AIChE J. 47, 1250 (2001).
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