A Hybrid Method of Modelling Solid-Induced Turbulence for Incompressible Fluids

Xu-Qiang Shao ； Rong-Hua Zhang ； Ying Yang

《電腦學刊》 27卷2期 (2016/07) Pp. 86-99

並列摘要

The simulation of turbulent details generated around solid boundaries is crucial for visually realistic fluid animations. We present a new hybrid approach aimed at incorporating solid-induced turbulence into the particle-based SPH fluid solver. Based on a novel adaptive sampling method, we split particles in regions around solid boundaries to more finely capture solid-induced turbulence, and merge small particles in regions away from solid boundaries to promote efficiency. Furthermore, a turbulence production model is proposed to identify the small particles which separate from solid boundaries and obtain the vorticity information. We employ a hybrid scheme which combines coarse Euler grid and Lagrangian particle to enforce fluid incompressibility and solve turbulence evolution. Our method provides a physically plausible way to model turbulence details generated around solid boundaries in particle-based fluid solvers, from which the results demonstrate a significant improvement in the quality of visual details as compared to existing methods.

並列關鍵字

turbulence ； fluid simulation ； smoothed particle hydrodynamics ； particle-based method