Molecular Dynamics Simulation on Cavitation Bubble Collapse

Authors

  • Chao QIU Civil Aviation Flight University of China
  • Han CHEN Civil Aviation Flight University of China
  • Changchun ZHOU Civil Aviation Flight University of China

DOI:

https://doi.org/10.5755/j01.mech.24.1.15127

Keywords:

Cavitation bubble； Temperature；Collapse time； Strength of jet flow

Abstract

The characteristics of bubble collapse are especially important for its application in cavitation-protection, super cavitation and aerospace. In that case, it is necessary to control the collapse process of bubble accurately according to requirements. In this paper, molecular dynamics simulation is used to study the dynamic characteristics of single bubble in canonical ensemble condition. Collapse process of bubble is described by analyzing the potential energy and movement of molecules. Effects of temperature on bubble dynamics characteristics are discussed especially. The result indicates that bubble collapses faster as the increase of temperature, but the strength of jet flow caused by collapsing becomes weaker the same time. It finds that the collapse time of bubble is almost shortened by 60%, and the strength of jet flow could be reduced by 35% with temperature varies from 0.62 to 0.80.

DOI: http://dx.doi.org/10.5755/j01.mech.24.1.15127

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Published

2018-02-21

Issue

Vol. 24 No. 1 (2018)

Section

MECHANICS OF FLUIDS AND GASES

License

The copyright for the articles in this journal is retained by the author(s) with the first publication right granted to the journal. The journal is licensed under the Creative Commons Attribution License 4.0 (CC BY 4.0).