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Article Dans Une Revue Physical Review Letters Année : 2008

Micrometric Granular Ripple Patterns in a Capillary Tube

Résumé

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.
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Dates et versions

hal-00290832 , version 1 (26-06-2008)

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Farzam Zoueshtiagh, Peter J. Thomas, V. Thomy, Alain Merlen. Micrometric Granular Ripple Patterns in a Capillary Tube. Physical Review Letters, 2008, 100, pp.054501. ⟨10.1103/PhysRevLett.100.054501⟩. ⟨hal-00290832⟩
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