Modeling and rendering viscous liquids

✍ Scribed by Kevin Steele; David Cline; Parris K. Egbert; Jonathan Dinerstein

• Publisher: John Wiley and Sons
• Year: 2004
• Tongue: English
• Weight: 310 KB
• Volume: 15
• Category: Article
• ISSN: 1546-4261
• DOI: 10.1002/cav.20

✦ Synopsis

Abstract

We present a particle‐based algorithm for modeling highly viscous liquids. Using a numerical time‐integration of particle acceleration and velocity, we apply external forces to particles and use a convenient organization, the adhesion matrix, to represent forces between different types of liquids and objects. Viscosity is handled by performing a momentum exchange between particle pairs such that momentum is conserved. Volume is maintained by iteratively adjusting particle positions after each time step. We use a two‐tiered approach to time stepping that allows particle positions to be updated many times per frame while expensive operations, such as calculating viscosity and adhesion, are done only a few times per frame. The liquid is rendered using an implicit surface polygonization algorithm, and we present an implicit function that convolves the liquid surface with a Gaussian function, yielding a smooth liquid skin. Copyright © 2004 John Wiley & Sons, Ltd.