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.
Laurent Duchemin 1; Christophe Josserand 2
@article{CRMECA_2012__340_11-12_797_0, author = {Laurent Duchemin and Christophe Josserand}, title = {Rarefied gas correction for the bubble entrapment singularity in drop impacts}, journal = {Comptes Rendus. M\'ecanique}, pages = {797--803}, publisher = {Elsevier}, volume = {340}, number = {11-12}, year = {2012}, doi = {10.1016/j.crme.2012.10.028}, language = {en}, }
TY - JOUR AU - Laurent Duchemin AU - Christophe Josserand TI - Rarefied gas correction for the bubble entrapment singularity in drop impacts JO - Comptes Rendus. Mécanique PY - 2012 SP - 797 EP - 803 VL - 340 IS - 11-12 PB - Elsevier DO - 10.1016/j.crme.2012.10.028 LA - en ID - CRMECA_2012__340_11-12_797_0 ER -
Laurent Duchemin; Christophe Josserand. Rarefied gas correction for the bubble entrapment singularity in drop impacts. Comptes Rendus. Mécanique, Out of Equilibrium Dynamics, Volume 340 (2012) no. 11-12, pp. 797-803. doi : 10.1016/j.crme.2012.10.028. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2012.10.028/
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