Abstract:
To reduce the numerical dissipation of smoothed particle hydrodynamics (SPH) method with artificial viscosity, a method to restore vortex and turbulence details was studied. First, according to the kinetic energy change rate in the cause of viscous force, the vorticity at discrete points was corrected. Then, the vorticity was restored to velocity field based on stream function to avoid the time-consuming process for Biot-Savart integral solution. Based on the calculation of the vorticity, the proposed method can not only enhance the existing vortex, but also generate new turbulence at potential locations, and easy integrate into existing SPH methods. Experiment results show that this method can realistically simulate turbulent details and achieve enhancement effects at different intensity levels.