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Fast Simulation of Viscous Fluids Using PositionBased Dynamics
>> YOUR LINK HERE: ___ http://youtube.com/watch?v=uRoH3HcftX8
Viscous fluids are ubiquitous, and reproducing their damped motions has been in demand for many applications. The most prevalent • approach to simulating viscous fluids is based on the Navier-Stokes equations and necessitates viscosity integration. However, to • simulate viscous fluids in a numerically stable manner, using explicit viscosity integration severely restricts time steps and requires • an excessively long period for computation. In this paper, we propose a novel particle-based Lagrangian method for efficiently • simulating viscous fluids by adopting position-based constraints. Our method uses the geometric configuration of particles for the • positional constraints to approximate the dynamics of viscous fluids using position-based dynamics; thus the method can plausibly • generate their motions while allowing for the use of much larger time steps than those previously adopted in the viscous fluid • simulations. We also propose an associated boundary-handling scheme for position-based fluids to precisely specify boundary • conditions for the constraints. Additionally, we reproduce elastic deformations of materials by controlling the constraints and • incorporate thermal conduction into our framework to simulate resultant changes in particle properties and phase transition in the • materials. By adjusting parameters, our method can encompass complex motions of fluids with different properties in a unified • framework. Several examples demonstrate the effectiveness as well as versatility of our method. • http://nishitalab.org/user/takahashi/...
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