Numerical calculation of laser-produced bubble near a solid boundary until the second collapse

R. Doihara, Koji Takahashi

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The violent motion of cavitation bubble near a solid boundary is treated by a newly developed numerical code based on the CIP (Cubic Interpolated Propagation) method. This is the first study to successfully simulate the repetitive collapses and rebounds of bubbles with the penetration of microjets until the second collapse while maintaining toroidal shape. The obtained gas-liquid interfaces show similar tendency to bubble shapes observed in past experimental studies, although phase change, surface tension and viscosity are neglected. The key factor of this flow field is the density difference between gas and liquid. The velocity of microjet and resulting water hammer pressure are calculated successfully. However no shock wave appears from the collapsed bubbles in the present study, which suggests that an appropriate model for highly-compressed gas is important for tempestuous two-phase flow. This study indicates a high possibility of using the Euler-type numerical code to calculate such complicated two-phase problems and also suggests which factor is dominant in the cavitation bubble dynamics.

Original languageEnglish
Pages (from-to)238-246
Number of pages9
JournalJSME International Journal, Series B: Fluids and Thermal Engineering
Volume44
Issue number2
DOIs
Publication statusPublished - May 1 2001

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Bubbles (in fluids)
bubbles
Gases
Cavitation
Lasers
lasers
Water hammer
cavitation flow
Liquids
Two phase flow
Shock waves
water hammer
Surface tension
Flow fields
compressed gas
Viscosity
two phase flow
liquids
gases
shock waves

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Physical and Theoretical Chemistry
  • Fluid Flow and Transfer Processes

Cite this

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