Ghost Fluid法を用いた圧縮性二相流の数値解法の検討 : 第2報,気液二相流のための改良(流体工学,流体機械)

概要

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The present work is concerned with the improvement of the Ghost Fluid Method (GFM) for gasliquid two-phase compressible flows. We have improved the GFM by correcting velocities, pressure and density at boundary nodes using the Riemann solutions to avoid numerical oscillations near the gas-liquid interface. Also, the definition of the values for ghost cells has been improved. The improved GFM is applied to one-dimensional shock tube problems, the interaction between a water shock wave and a cylindrical gas bubble, and the interaction between an air shock wave and a water column. It is shown that the correction with the Riemann solutions is effective in diminishing the numerical oscillations near the interface. We have succeeded in capturing the sharp interface for the shock-air bubble interaction with good mass conservation. The present numerical result for the interaction between an air shock wave and a water column is in good agreement with the experiment by Igra and Takayama.
一般社団法人日本機械学会の論文
2006-11-25