Drop splashing induced by target roughness and porosity: The size plays no role

Advances in Colloid and Interface Science
Ilia V RoismanC Tropea

Abstract

Drop splash as a result of an impact onto a dry substrate is governed by the impact parameters, gas properties and the substrate properties. The splash thresholds determine the boundaries between various splash modes. Various existing models for the splash threshold are reviewed in this paper. It is shown that our understanding of splash is not yet complete. The most popular, widely used models for splash threshold do not describe well the available experimental data. The scientific part of this paper is focused on the description of drop prompt splash on rough and porous substrates. It is found that the absolute length scales of the substrate roughness, like Ra or Rz, do not have any significant effect on the splash threshold. It is discovered that on rough substrates the main influencing splash parameters are the impact Weber number and the characteristic slope of the roughness of the substrate. The drop deposition without splash on porous substrates is enhanced by the liquid modified Reynolds number. Surprisingly, it is not influenced by the pore size, at least for the impact parameters used in the experiments. Finally, an empirical correlation for the prompt splash on rough and porous substrates is proposed, based on a rath...Continue Reading

References

Aug 7, 2007·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Lei Xu
Apr 11, 2009·Langmuir : the ACS Journal of Surfaces and Colloids·R RiobooJ De Coninck
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Citations

May 27, 2016·Langmuir : the ACS Journal of Surfaces and Colloids·Ileana MalavasiMarco Marengo
May 10, 2017·Langmuir : the ACS Journal of Surfaces and Colloids·Jiayi Zhao, Shuo Chen
Jul 10, 2019·Physical Review Letters·Miguel A Quetzeri-SantiagoJ Rafael Castrejón-Pita
Oct 23, 2019·Scientific Reports·Miguel A Quetzeri-SantiagoJ Rafael Castrejón-Pita
Jun 10, 2019·Journal of Colloid and Interface Science·H Almohammadi, A Amirfazli
May 12, 2021·Soft Matter·Marie-Jean ThoravalDetlef Lohse
Jun 12, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Rui ZhangFeng He
Oct 28, 2017·Langmuir : the ACS Journal of Surfaces and Colloids·Fiona R SmithDavid Brutin
Aug 20, 2021·Journal of Colloid and Interface Science·Y T AksoyM R Vetrano
Nov 10, 2020·Langmuir : the ACS Journal of Surfaces and Colloids·Haofei LiYilin Wang
May 12, 2020·Langmuir : the ACS Journal of Surfaces and Colloids·Fuqiang ChuDongsheng Wen
Sep 2, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Lei YangPeng Zhang
Nov 19, 2018··Sanjeev ChandraJordan Bouchard

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