Abstract
Turbulence modeling has recently drawn many attentions in fluid animation to generate small-scale rolling features. Being one of the widely adopted approaches, vorticity confinement method re-injects lost energy dissipation back to the flow. However, previous works suffer from deficiency when large vorticity coefficient ε is used, due to the fact that constant ε is applied all over the simulated domain. In this paper, we propose a novel approach to enhance the visual effect by employing an adaptive vorticity confinement which varies the strength with respect to the helicity instead of a user-defined constant. To further improve fine details in turbulent flows, we are not only applying our proposed vorticity confinement to low-resolution grid, but also on a finer grid to generate sub-grid level turbulence. Since the incompressible Navier-Stokes equations are solved only in low-resolution grid, this saves a significant amount of computation. Several experiments demonstrate that our method can produce realistic smoke animation with enhanced turbulence effects in real-time.
Original language | English |
---|---|
Pages (from-to) | 107-114 |
Number of pages | 8 |
Journal | Computer Animation and Virtual Worlds |
Volume | 22 |
Issue number | 2-3 |
DOIs | |
Publication status | Published - 2011 |
Externally published | Yes |
Keywords
- fluid simulation
- smoke animation
- turbulence
- vorticity confinement