跌落冲击
机械
下降(电信)
阻力
影响
超高速
压力降
剪应力
材料科学
环境科学
统计物理学
经典力学
气象学
物理
机械工程
工程类
飞溅
热力学
作者
Xiang Cheng,Ting-Pi Sun,Leonardo Gordillo
出处
期刊:Annual Review of Fluid Mechanics
[Annual Reviews]
日期:2022-01-05
卷期号:54 (1): 57-81
被引量:12
标识
DOI:10.1146/annurev-fluid-030321-103941
摘要
Dynamic variables of drop impact such as force, drag, pressure, and stress distributions are key to understanding a wide range of natural and industrial processes. While the study of drop impact kinematics has been in constant progress for decades thanks to high-speed photography and computational fluid dynamics, research on drop impact dynamics has only peaked in the last 10 years. Here, we review how recent coordinated efforts of experiments, simulations, and theories have led to new insights on drop impact dynamics. Particularly, we consider the temporal evolution of the impact force in the early- and late-impact regimes, as well as spatiotemporal features of the pressure and shear-stress distributions on solid surfaces. We also discuss other factors, including the presence of water layers, air cushioning, and nonspherical drop geometry, and briefly review granular impact cratering by liquid drops as an example demonstrating the distinct consequences of the stress distributions of drop impact.
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