Finger formation during droplet impact on a liquid film

被引：33

作者：

Gueyffier, D ^{[1
]}

Zaleski, S ^{[1
]}

机构：

[1] Univ Paris 06, Modelisat Mecan Lab, CNRS, UMR 7607, F-75252 Paris 05, France

来源：

COMPTES RENDUS DE L ACADEMIE DES SCIENCES SERIE II FASCICULE B-MECANIQUE PHYSIQUE ASTRONOMIE | 1998年 / 326卷 / 12期

关键词：

direct numerical simulation; interfaces; splash; droplet impact;

D O I：

10.1016/S1251-8069(99)80037-4

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The impact of a droplet of diameter D an a liquid film is studied numerically in three dimensions of space, with and without axisymmetry. When this axisymmetry is broken by a small perturbation, a crown topped with growing fingers is obtained. An initial perturbation amplitude of 0.005 D is enough. Simulations provide evidence for impulsive accelerations of the liquid-gas interface soon after impact. Fingers form where the troughs of the initial perturbation were. Thus, curvature is reversed just when fingers develop. The length of these fingers grows linearly with time. (C) Academie des Sciences/Elsevier, Paris.

引用

页码：839 / 844

页数：6

共 17 条

[1] PRESSURE-IMPULSE THEORY FOR LIQUID IMPACT PROBLEMS [J].