Events and conditions in droplet impact: A phase field prediction

•Diffusive interface modeling can capture detailed outcomes of droplet impact.•The liquid properties are important in early spreading for impacts of low speed.•The Reynolds number and Ohnesorge number confine a region for a central bubble to be observed. The phenomenon of droplet impact on a smooth,...

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Bibliographic Details
Published inInternational journal of multiphase flow Vol. 87; pp. 54 - 65
Main Authors Wang, Yuli, Gratadeix, Anthony, Do-Quang, Minh, Amberg, Gustav
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.12.2016
Subjects
Droplet impact
Engineering Mechanics
Gas entrapment
Phase field method
Simulation
Splashing
Teknisk mekanik
Droplet impact
Splashing
Simulation
Gas entrapment
Phase field method
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Summary:•Diffusive interface modeling can capture detailed outcomes of droplet impact.•The liquid properties are important in early spreading for impacts of low speed.•The Reynolds number and Ohnesorge number confine a region for a central bubble to be observed. The phenomenon of droplet impact on a smooth, flat, partially wetted surface is studied by phase field simulation. A map of the different impact regimes is constructed for Reynolds numbers ranging from Re=9 to Re=9×104, and Ohnesorge numbers ranging from Oh=3.3×10−4 to Oh=1.05. The results are compared with previous experiments from several aspects such as gas bubble entrapment, spreading radius and liquid sheet splashing, etc. The simulation proposes event predictions that are consistent with previous experiments. Our results and discussions give an overview of important characteristics during droplet impact, and provide insights on the droplet spreading after impact.
ISSN:0301-9322
1879-3533
1879-3533
DOI:10.1016/j.ijmultiphaseflow.2016.08.009