Numerical simulation of binary collisions using a modified surface tension model with particle method

Zhongguo SUN, Guang XI, Xi CHEN*

*Corresponding author for this work

Research output: Journal PublicationsJournal Article (refereed)peer-review

11 Citations (Scopus)


The binary collision of liquid droplets is of both practical importance and fundamental value in computational fluid mechanics. We present a modified surface tension model within the moving particle semi-implicit (MPS) method, and carry out two-dimensional simulations to investigate the mechanisms of coalescence and separation of the droplets during binary collision. The modified surface tension model improves accuracy and convergence. A mechanism map is established for various possible deformation pathways encountered during binary collision, as the impact speed is varied; a new pathway is reported when the collision speed is critical. In addition, eccentric collisions are simulated and the effect of the rotation of coalesced particle is explored. The results qualitatively agree with experiments and the numerical protocol may find applications in studying free surface flows and interface deformation.

Original languageEnglish
Pages (from-to)619-627
Number of pages9
JournalNuclear Engineering and Design
Issue number4
Publication statusPublished - Apr 2009
Externally publishedYes

Bibliographical note

This work is supported in part by China Scholarship Council, by Natural Science Foundation of China (NSFC) Project (50725621), by National Science Foundation (NSF) CMMI-CAREER-0643726, and in part by the Department of Civil Engineering and Engineering Mechanics, Columbia University.


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