Fujisawa, MakotoMimura, GoAmano, ToshiyukiMiyazaki, JunKato, HirokazuBing-Yu Chen and Jan Kautz and Tong-Yee Lee and Ming C. Lin2013-10-312013-10-312011978-3-905673-84-5https://doi.org/10.2312/PE/PG/PG2011short/067-072This paper presents a fast simulation method for turbulent flow which uses a particle method and wavelet analysis. To simulate fluid flow, the method uses smoothed particle hydrodynamics (SPH), which discretizes the fluid into a collection of particles, and detects regions where turbulent flow will occur by using wavelet analysis without a spatial grid. By taking the curl of wavelet noise, the turbulent flow is then appended as a divergence-free turbulence velocity field. Additionally, by using vortex subparticles, which characterize the vortex features of turbulence, a subparticle-scale representation of turbulent flow is proposed. Implementing almost all processes on a graphics processing unit (GPU), simulations are performed in near real time.Categories and Subject Descriptors (according to ACM CCS): I.3.7 [Computer Graphics]: Three-Dimensional Graphics and Realism-Animation