报告题目：Hybrid Vortex Model for Efficient Diffusive, Turbulent Smoke Simulations
报告人： Hanqiu Sun（Associate Professor, The Chinese University of Hong Kong）
Vortex based simulation methods can produce attractive visual effects, so most favored to enhance the dynamic smoke simulation. However, using such physical models is still a challenging task to efficiently and stably reproduce high-quality smoke, as the motion is influenced by all other vortex elements in the simulation domain in which vortex stretching and the complex evolution are hard to tackle. In this work, we present the novel hybrid vortex model that seamlessly fuses the vortex filament and vortex particle in one system to efficiently simulate stable and scalable dynamic smokes. We first introduce the vortex filaments in grids scheme, in which the grids dynamically bridge the motion of vortex filaments and smoke particles for efficient smoke simulation with fine visual effects. We further work on converting the vortex filament when overly stretched into vortex particles while maintaining the total circulation, which effectively stabilizes the simulator. We also realize the parallel processing of hybrid vortex model on the modern GPU, so further improving the simulation efficiency. The experimental results demonstrated that our hybrid scheme enables producing the visual plausibility with diffusive and highly turbulent smoke effects, as well as the flexibility for scale of details and efficient simulation performance.
Prof. Sun received M.S. in electrical engineering from University of British Columbia, and Ph.D. in computer science from University of Alberta, Canada. Prof. Sun has published more than hundred technical papers refereed in VR/CG journals and international conferences, including MIT Journal of PRESENCE, Journal of Virtual Reality, IEEE Transactions on Visualization and Computer Graphics, Computers & Graphics, IEEE Journal of Computer Graphics and Applications, Journal of Computer Graphics Forum, IEEE Transactions on SMC, ACM Siggraph Asia, Computational Geometry, IEEE Transactions on Information Technology, Journal of Algorithms, Computer Animation and Virtual Worlds, Journal of Visual Languages and Computing, Journal of Applied Mathematics, The Visual Computer, refereed book chapters and international conferences. She has served as guest editors of MIT PRESENCE, Journal of CAVW and IJIG, program co-chair of ACM VRST, organization co-chair of Pacific Graphics, CGI, director of advanced workshop on VR. Her current research interests include virtual reality, interactive graphics/animation, real-time hypermedia, mobile image/video synopsis, computer-assisted surgery, Haptics and dynamics simulations.