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The granular jump

Published online by Cambridge University Press:  23 January 2007

J. F. BOUDET ,
Y. AMAROUCHENE ,
B. BONNIER  and
H. KELLAY
J. F. BOUDET
Affiliation:
Centre de Physique Moléculaire Optique et Hertzienne, UMR 5798, Université Bordeaux 1, 351 cours de la Libération, 33405 Talence, France
Y. AMAROUCHENE
Affiliation:
Centre de Physique Moléculaire Optique et Hertzienne, UMR 5798, Université Bordeaux 1, 351 cours de la Libération, 33405 Talence, France
B. BONNIER
Affiliation:
Centre de Physique Moléculaire Optique et Hertzienne, UMR 5798, Université Bordeaux 1, 351 cours de la Libération, 33405 Talence, France
H. KELLAY
Affiliation:
Centre de Physique Moléculaire Optique et Hertzienne, UMR 5798, Université Bordeaux 1, 351 cours de la Libération, 33405 Talence, France
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Abstract

When a fluid jet hits a solid surface, a hydraulic jumps occurs. This jump sharply delimits a thin film of liquid from a thicker film. We show here that a granular jet impinging on a solid surface also gives rise to several features reminiscent of the hydraulic jump and we refer to this situation as the granular jump. We describe, in detail, this phenomenon and show that if many of its features can be understood in analogy with the hydraulic jump, others are directly related to the granular nature of the medium and, in particular, the small-scale dynamics of the jump.

Type
Papers
Information
Journal of Fluid Mechanics , Volume 572 , February 2007 , pp. 413 - 431
Copyright
Copyright © Cambridge University Press 2007

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