Synthesizing solid-induced turbulence for particle-based fluids

Simulating the accompanying turbulent details of fluid-solid coupling is still challenging, as numerical dissipation always plagues current fluid solvers. In this paper, we propose a novel particle-based method to simulate turbulent details generated behind objects in SPH fluids. A turbulence production model, approximating the boundary layer theory on the fly in SPH fluids, is proposed to identify which fluid particles shed from object surfaces and are seeded as vortex particles. Then the fluctuating velocities stemming from the generated vorticity field are calculated using an SPH-like summation interpolant formulation of the Biot-Savart law. And the stable evolution of vorticity field is solved by introducing an artificial dissipation term into the vorticity N-S equation. The advantages of our turbulence synthesis method in computer animation are demonstrated via various virtual scenarios.