随机扰动下三维流体界面不稳定性的并行计算

PARALLEL COMPUTATION OF FLUID INTERFACE INSTABILITY IN THREE DIMENTION WITH RANDOM PERTURBATION

对三维流体界面不稳定性的数值模拟引进了新的数值计算方法 ,并在MPI并行计算环境下进行了数值模拟 .利用LevelSet方法确定界面位置 ,零水平集对应界面位置 .对应离散LevelSet方程和界面两侧的两套Euler方程 ,借助于Ghost网格方法来完成离散 .对最后网格点上的两套状态量的辨认依赖于该点的LevelSet值的符号 .

Computation of three dimensional fluid interface instability with random perturbation is performed on a 8 CPU personal parallel computer system.The parallel computation platform is a message passage interface(MPI).A second order TVD scheme with Ghost method is applied with a fully parallel algorithm to the 3D Euler equations.Level Set function is used to track the motion of a fluid interface in an Eulerian framework.Buffer zone and data communication are discussed.The number of computation meshes is about 1 million.Bubble evolution with random perturbation in Rayleigh Taylor instability is obtained by numerical simulation.