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Volume 28 Issue 6
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Chinese Journal of High Pressure Physics  > 2014  >  28(6): 699-704.
SHI Ru-Chao, ZHANG Ya-Jun, XU Sheng-Li. Simulation of Expansion of High Pressure Bubble under Water in Complex Calculation Region using NGFM in Cartesian Coordinate System[J]. Chinese Journal of High Pressure Physics, 2014, 28(6): 699-704. doi: 10.11858/gywlxb.2014.06.009
Citation: SHI Ru-Chao, ZHANG Ya-Jun, XU Sheng-Li. Simulation of Expansion of High Pressure Bubble under Water in Complex Calculation Region using NGFM in Cartesian Coordinate System[J]. Chinese Journal of High Pressure Physics, 2014, 28(6): 699-704. doi: 10.11858/gywlxb.2014.06.009
shu

Simulation of Expansion of High Pressure Bubble under Water in Complex Calculation Region using NGFM in Cartesian Coordinate System

doi: 10.11858/gywlxb.2014.06.009
  • 1.

    Department of Modern Mechanics, USTC, Hefei 230027, China

  • 2.

    Institute of Fluid Physics, CAEP, Mianyang 621999, China

  • Received Date: 28 Jan 2013
  • Rev Recd Date: 26 Apr 2013
    Abstract
  • We adopted a new version of ghost fluid method (NGFM) to treat the wall boundary in a complex calculation region in Cartesian coordinate system, and real ghost fluid method (RGFM) to predict the flow states at grid nodes just next to the gas-liquid interface.Flow field was solved by Euler equation with 5th-order WENO spatial discretization and 2nd-order Runge-Kutta (R-K) time discretization.We used the level set method to keep track of gas-liquid interface.Level set function was discretized by 5th-order Hamilton-Jacobi WENO and 3rd-order R-K method.We verified that NGFM was easy to extend and could be applied to treat complex wall boundary in Cartesian grid by comparing with results in arbitrary coordinate system.We carried out pressure contours, the change process of bubble shape and pressure history at some given points.The numerical results demonstrate that the expansion of high pressure bubble is restricted by the reflected shock wave from the wall.It is also shown that the reflection of strong shock wave from wall can lead to extensive cavitation flow.

     

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