Scaling of the splash threshold for low-viscosity fluids
Scaling of the splash threshold for low-viscosity fluids
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DOI：
10.1209/0295-5075/106/24001
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发表时间：
2014-03
期刊：
影响因子：
--
通讯作者：
C. S. Stevens
中科院分区：
文献类型：
--
作者：
C. S. Stevens
当我们改变控制参数：液滴冲击速度、液滴半径、粘度、表面张力、密度和气体分子量时，确定低粘度液滴在光滑干燥表面上飞溅的起始环境气体压力。该阈值压力表明，当液滴冲击速度变化时，存在两种不同的状态。通过使用仅三个无量纲数的函数重新缩放数据，常用的雷诺数和韦伯数，以及液滴半径与气体平均自由程的比率，所有数据都被折叠成包含两个区域的单个曲线。
The ambient gas pressure is determined for the onset of splashing of low-viscosity liquid drops on smooth dry surfaces as we change the control parameters: drop impact velocity, drop radius, viscosity, surface tension, density, and gas molecular weight. This threshold pressure indicates that there are two distinct regimes when drop impact velocity is varied. By rescaling data using functions of only three dimensionless numbers, the commonly used Reynolds and Weber numbers, as well as the ratio of drop radius to gas mean free path, all data is collapsed to a single curve that encompasses both regimes.