期刊
COMPTES RENDUS MECANIQUE
卷 340, 期 11-12, 页码 797-803出版社
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.crme.2012.10.028
关键词
Drop impact; Rarefied gas
类别
资金
- Agence nationale de la recherche [ANR-09-JCJC-0022-01]
- Programme Emergence(s) of the Ville de Paris
- Agence Nationale de la Recherche (ANR) [ANR-09-JCJC-0022] Funding Source: Agence Nationale de la Recherche (ANR)
We study the non-continuous correction in the dynamics of drop impact on a solid substrate. Close to impact, a thin film of gas is formed beneath the drop so that the local Knudsen number is of order one. We consider the first correction to the dynamics which consists of allowing slip of the gas along the substrate and the interface. We focus on the singular dynamics of entrapment that can be seen when surface tension and liquid viscosity can be neglected. There we show that different dynamical regimes are present that tend to lower the singularity strength. We finally suggest how these effects might be connected to the influence of the gas pressure in the impact dynamics observed in recent experiments. (C) 2012 Published by Elsevier Masson SAS on behalf of Academie des sciences.
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