Molecular Dynamics Simulation of Collapsing Phase for a Sonoluminescing Gas Bubble in Sulfuric Acid Solutions : A Comparative Study with Theoretical Results

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Author(s)

Abstract

Sonoluminescence is the light emission associated with the catastrophic collapse of a bubble oscillating under ultrasound. Molecular dynamics (MD) simulation of a collapsing bubble in sulfuric acid solution was performed and the results from the simulation were compared with the theoretical results which are in good agreement with observed ones. The molecules inside the collapsing noble gas bubble were modeled as hard sphere ones and the instantaneous bubble radius and the bubble wall velocity which were used in the simulation were obtained from the Keller-Miksis equation with pressure data taken from MD simulation. One million particles were used in the scaled-down MD simulation of the sonoluminescing bubble with equilibrium radius of 15μm having 10^<11> molecules. Remarkable agreement between the MD simulation results and theoretical calculation values was obtained for the adiabatic process. However, the heat bath boundary condition yields much shorter thermal spike than the theoretical value even though the peak temperature obtained is similar to the theoretical one.

Journal

  • Journal of the Physical Society of Japan

    Journal of the Physical Society of Japan 76(2), 24301-1-11, 2007-02-15

    The Physical Society of Japan (JPS)

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Codes

  • NII Article ID (NAID)
    110006203513
  • NII NACSIS-CAT ID (NCID)
    AA00704814
  • Text Lang
    ENG
  • Article Type
    ART
  • ISSN
    00319015
  • NDL Article ID
    8640383
  • NDL Source Classification
    ZM35(科学技術--物理学)
  • NDL Call No.
    Z53-A404
  • Data Source
    CJP  NDL  NII-ELS 
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