粒子交換法を用いたMPS法によるレイリー・テイラー不安定性の数値解析

抄録

In computational fluid dynamics using particle method, many approaches have been attempted to enhance the accuracy or stability of calculations. These approaches included the improvement of the free surface boundary conditions. However, smooth distribution of the particles on the interfaces has not been researched enough. Thus, in order to improve the particle distribution on the interfaces, a particle exchange technique is developed and adapted to the simulation of Rayleigh-Taylor instability in the present study. Four methods of particle exchange, which are combinations of different approaches of the region of exchange particles and the evaluation of exchange, are tested. In all simulation, the interface of fluid is smoothed, and as well as the development of interface agrees well with the result of the conventional MPS method.