Drop dynamics after impact on a solid wall: Theory and simulations
Drop dynamics after impact on a solid wall: Theory and simulations
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DOI：
10.1063/1.3432498
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发表时间：
2010-06-01
影响因子：
4.6
通讯作者：
Zaleski, Stephane
中科院分区：
文献类型：
--
作者：
Eggers, Jens;Fontelos, Marco A.;Zaleski, Stephane
我们研究了液滴高速撞击平面固体表面时，动能大于表面能，惯性大于粘性效应。随着液滴的扩散，它变形成一层薄膜，其厚度受到固体壁面附近粘性边界层生长的限制。由于表面张力，膜的边缘相对于膜中的流动收缩，流体聚集成包围膜的环形边缘。利用质量和动量守恒，我们建立了沉积物半径作为时间函数的模型。在每个阶段，我们对Navier-Stokes方程的理论和数值模拟进行了详细的比较。(C) 2010年美国物理研究所。(doi: 10.1063/1.3432498)
We study the impact of a fluid drop onto a planar solid surface at high speed so that at impact, kinetic energy dominates over surface energy and inertia dominates over viscous effects. As the drop spreads, it deforms into a thin film, whose thickness is limited by the growth of a viscous boundary layer near the solid wall. Owing to surface tension, the edge of the film retracts relative to the flow in the film and fluid collects into a toroidal rim bounding the film. Using mass and momentum conservation, we construct a model for the radius of the deposit as a function of time. At each stage, we perform detailed comparisons between theory and numerical simulations of the Navier-Stokes equation. (C) 2010 American Institute of Physics. [doi:10.1063/1.3432498]