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The paper Haoran XIE, the school of Knowledge science, submitted has been selected as "Highlight" in the SIGGRAPH ASIA 2013

The paper Haoran XIE, the second-year doctoral student of the school of Knowledge Science, submitted as technical Briefs has been selected as "Highlight" in the SIGGRAPH ASIA 2013.


[Selected title] Stochastic Modeling of Immersed Rigid-body Dynamics
[Abstract] The simulation of immersed rigid-body dynamics involves the coupling between objects and turbulent flows, which is a complicated task in computer animation. In this paper, we propose a stochastic model of the dynamics of rigid bodies immersed in viscous flows to solve this problem. We first modulate the dynamic equations of rigid bodies using generalized Kirchhoff equations (GKE). Then, a stochastic differential equation called the Langevin equation is proposed to represent the velocity increments due to the turbulences. After the precomputation of the Kirchhoff tensor and the kinetic energy of a synthetic turbulence induced by the object moving, we utilize a fractional-step method to solve the GKE with vortical loads of drag and lift dynamics in runtime. The resulting animations include both inertial and viscous effects from the surrounding flows for arbitrary geometric objects. Our model is coherent and effective to simulate immersed rigid-body dynamics in real-time.
[Comment] This work is a first step toward our research scope "Immersed Body Dynamics", which is a promising new research field in computer graphics. The outcome of this research can be used to significantly enhance the reality of the related physical simulations in graphical productions.


December 4, 2013