[Sédimentation de petites particules : comment un problème si simple peut-il être si compliqué ?]
La sédimentation de particules à bas nombre de Reynolds peut être considérée comme un des exemples les plus simples d'écoulement de suspension. Et pourtant ce problème est compliqué à cause de la dominance des interactions hydrodynamiques multicorps à longues portées. Trois situations illustreront cette difficulté : la sédimentation d'une suspension de sphères, de particules anisotropes (des fibres) et d'un nuage sphérique de particules.
Although sedimentation can be considered as one of the simplest examples of suspension flow, much remains unknown about the fundamental properties of sedimenting suspensions. The problem that one encounters lies in the long range nature of the multibody hydrodynamic interactions between particles. This will be illustrated for sedimenting suspensions of spheres, of non-spherical particles such as fibers, and for sedimenting clouds of particles.
Mot clés : Mécanique des fluides, Sédimentation, Interactions hydrodynamiques multicorps, Bas nombre de Reynolds
@article{CRMECA_2006__334_8-9_539_0,
author = {\'Elisabeth Guazzelli},
title = {Sedimentation of small particles: how can such a simple problem be so difficult?},
journal = {Comptes Rendus. M\'ecanique},
pages = {539--544},
publisher = {Elsevier},
volume = {334},
number = {8-9},
year = {2006},
doi = {10.1016/j.crme.2006.07.009},
language = {en},
}
Élisabeth Guazzelli. Sedimentation of small particles: how can such a simple problem be so difficult?. Comptes Rendus. Mécanique, Volume 334 (2006) no. 8-9, pp. 539-544. doi : 10.1016/j.crme.2006.07.009. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2006.07.009/
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