A Parallel SPH Scheme for 3D Fluid Dynamics

Abstract

Recently, when analyzing physical problems, numerical simulations become very important approach. Although grid-based are dominant in the simulation, they are challenged because of the use of mesh. So the meshfree methods such as smoothed particle hydrodynamics (SPH) are attractive when dealing with fluid flow and large deformation problems. This method represents the whole problem domain with a set of arbitrarily distributed particles whose properties are determined by neighboring particles and smoothed kernel function. Parallel algorithm is applied to the SPH method to improve the efficiency. In this method, the whole domain is distributed into several subdomains and the boundary conditions of subdomains are imposed to the interface particles. They placed right on the segment plane and play an important role in the detection of neighbor particles near the boundary. During searching neighboring particles, many useless particles are filtered with the help of interface particles so that time cost of simulation can be decreased. Some fluid cases were tested to validate the accuracy and the efficiency of the proposed method.