Hybrid Smoothed Particle Hydrodynamics

Karthik Raveendran, Chris Wojtan, Greg Turk We present a new algorithm for enforcing incompressibility for Smoothed Particle Hydrodynamics (SPH) by preserving uniform density across the domain. We propose a hybrid method that uses a Poisson solve on a coarse grid to enforce a divergence free velocity field, followed by a local density correction of the […]

A Fluid Pressure Solver Handling Separating Solid Boundary Conditions

Nuttapong Chentanez, Matthias Mueller We present a multigrid method for solving the linear complementarity problem (LCP) resulting from discretizing the Poisson equation subject to separating solid boundary conditions in an Eulerian liquid simulation’s pressure projection step. The method requires only a few small changes to a multigrid solver for linear systems. Our generalized solver is […]

Asynchronous Integration with Phantom Meshes

David Harmon, Qingnan Zhou, Denis Zorin Asynchronous variational integration of layered contact models provides a framework for robust collision handling, correct physical behavior, and guaranteed eventual resolution of even the most difficult contact problems. Yet, even for low-contact scenarios, this approach is significantly slower compared to its less robust alternatives — often due to handling […]

SIGGRAPH Asia 2011

The subset of physics-based animation papers includes: Pattern-Guided Smoke Animation with Lagrangian Coherent Structure A Hybrid Iterative Solver for Robustly Capturing Coulomb Friction in Hair Dynamics Sketch-Based Dynamic Illustration of Fluid Systems

Preview-Based Sampling for Controlling Gaseous Simulations

Ruogang Huang, Zeki Melek, John Keyser In this work, we describe an automated method for directing the control of a high resolution gaseous fluid simulation based on the results of a lower resolution preview simulation. Small variations in accuracy between low and high resolution grids can lead to divergent simulations, which is problematic for those […]

Large-Scale Dynamic Simulation of Highly Constrained Strands

Shinjiro Sueda, Garrett L. Jones, David I. W. Levin, Dinesh K. Pai A significant challenge in applications of computer animation is the simulation of ropes, cables, and other highly constrained strand-like physical curves. Such scenarios occur frequently, for instance, when a strand wraps around rigid bodies or passes through narrow sheaths. Purely Lagrangian methods designed for less constrained […]