EG 2013 - Short Papers

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https://diglib.eg.org/handle/10.2312/300

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Browsing EG 2013 - Short Papers by Subject "Animation"

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    Enhanced Lattice Boltzmann Shallow Waters for Real-time Fluid Simulations
    (The Eurographics Association, 2013) Ojeda, Jesus; Susín, Anton; M.- A. Otaduy and O. Sorkine
    We present a novel approach at simulating fluids in real-time by coupling the Lattice Boltzmann Method for Shallow Waters (LBMSW) with particle systems. The LBM can handle arbitrary underlying terrain and arbitrary fluid depth, which, in turn, allows us to extend it to track dry regions. The LBM is also two-way coupled with rigid bodies. The particle system adds more detail to the LBM; breaking waves are detected from the surface simulation and particles are generated to provide the effect, taking effectively certain amounts of fluid and reintegrating it back once they fall over again. Both the LBM and the particle simulation are implemented in CUDA, although rigid bodies are simulated in CPU. Finally, we show the effectiveness of the method on commodity hardware.
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    Volume Controllable SPH
    (The Eurographics Association, 2013) Shinkawa, Masanori; Kawaguchi, Yoichiro; M.- A. Otaduy and O. Sorkine
    We extend a Predictive Corrective Incompressible SPH (PCISPH) algorithm to a volume controllable SPH algorithm. In order to handle volume changes, we develop a method to control fluid volume. Our method precomputes a pressure correction factor of PCISPH at various particle volume and interpolates these factors to get a factor for arbitrary particle volume. Thanks to a PCISPH's high correctiveness, our method enables both stiff volume contraction and expansion. Additionally we derive computations for density and a force by pressure to prevent instabilities and unnatural flocks near interfaces between two fluids with different particle volume. Furthermore, granular simulators based on fluid simulators are also extensible to simulate volume change of granular materials.