217 Ghost Fluid法を用いた圧縮性気液二相流の数値シミュレーション(S37-2 CFDの新展開(2),S37 CFDの新展開)  [in Japanese] 217 Numerical Simulations of Compressible Two-Phase Flows Using the Ghost Fluid Method  [in Japanese]

Using the Ghost Fluid Method for compressible two-phase flows in which one fluid is much stiffer than the other, the numerical oscillations occur near the interface. To prevent this problem, we suggested the modification of the value of the grid points near the interface using the one-dimensional Riemann solutions. We applied this method to the problem of water shock-cylindrical air bubble interaction. The results showed that the modification using the Riemann solutions improves the numerical stability of the Ghost Fluid Method. We succeeded in simulating the violent bubble collapse with good mass conservation.