filename     : Kei05.pdf
entry        : appeared
conference   : Eurographics Symposium on Point-Based Graphics, Stoney Brook, New York, USA, June 21 - 22, 2005
pages        : 10
year         : 2005
month        : June
title        : A Unified Lagrangian Approach to Solid-Fluid Animation
subtitle     :
author       : Richard Keiser, Bart Adams, Dominique Gasser, Paolo Bazzi, Philip Dutré, Markus Gross
booktitle    : Proceedings of the Eurographics Symposium on Point-Based Graphics 2005
ISSN/ISBN    : 1811-7813/3-905673-20-7
editor       : Marc Alexa, Szymon Rusinkiewicz
publisher    : Eurographics Association
publ.place   :
volume       : 
issue        : 
pages        : 125-133
language     : English
keywords     : physics-based animation, meshless methods, solids, fluids, point-based animation
abstract     : 

We present a framework for physics-based animation of deforming solids and fluids. By merging the equations of solid mechanics with the Navier-Stokes equations using a particle-based Lagrangian approach, we are able to employ a unified method to animate both solids and fluids as well as phase transitions. Central to our framework is a hybrid implicit-explicit surface generation approach which is capable of representing fine surface detail as well as handling topological changes in interactive time for moderately complex objects. The generated surface is represented by oriented point samples which adapt to the new position of the particles by minimizing the potential energy of the surface subject to geometric constraints. We illustrate our algorithm on a variety of examples ranging from stiff elastic and plasto-elastic materials to fluids with variable viscosity.