.png){kind=icon}
返回
Capillary-scale solid rebounds: experiments, modelling and simulations
.png){kind=icon}
OA
AI
DOI：10.1017/jfm.2020.1135.png)
.png){kind=icon}
原文求助.png){kind=icon}
分享.png){kind=icon}
收藏
摘要
En 中文
A millimetre-size superhydrophobic sphere impacting on the free surface of a quiescent bath can be propelled back into the air by capillary effects and dynamic fluid forces, whilst transferring part of its energy to the fluid. We report the findings of a thorough investigation of this phenomenon, involving different approaches. Over the range from minimum impact velocities required to produce rebounds to impact velocities that cause the sinking of the solid sphere, we focus on the dependence of the coefficient of restitution, contact time and maximum surface deflection on the different physical parameters of the problem. Experiments, simulations and asymptotic analysis reveal trends in the rebound metrics, uncover new phenomena at both ends of the Weber number spectrum, and collapse the data. Direct numerical simulations using a pseudo-solid sphere successfully reproduce experimental data whilst also providing insight into flow quantities that are challenging to determine from experiments. A model based on matching the motion of a perfectly hydrophobic impactor to a linearised fluid free surface is validated against direct numerical simulations and used in the low-Weber-number regime. The hierarchical and cross-validated models in this study allow us to explore the entirety of our target parameter space within a challenging multi-scale system.
Keyword:
computational methods
capillary waves
wave-structure interactions
期刊
IF:
3.9
论文数:
2.0W
被引数:
9.4W
机构
引用论文
分享收藏分享收藏Non-wetting impact of a sphere onto a bath and its application to bouncing droplets球体对浴的非润湿冲击及其在弹跳液滴中的应用
OAAI
OAAI分享收藏Numerical study of hydrophobic micron particle's impaction on liquid surface疏水微米粒子撞击液体表面的数值研究.png)
PHYSICS OF FLUIDS
PHYSICS OF FLUIDSIF4.3
PREAI
分享收藏
查看更多内容