A method for animating viscoelastic fluids

  • Authors:
  • Tolga G. Goktekin;Adam W. Bargteil;James F. O'Brien

  • Affiliations:
  • University of California, Berkeley;University of California, Berkeley;University of California, Berkeley

  • Venue:
  • ACM SIGGRAPH 2004 Papers
  • Year:
  • 2004

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Abstract

This paper describes a technique for animating the behavior of viscoelastic fluids, such as mucus, liquid soap, pudding, toothpaste, or clay, that exhibit a combination of both fluid and solid characteristics. The technique builds upon prior Eulerian methods for animating incompressible fluids with free surfaces by including additional elastic terms in the basic Navier-Stokes equations. The elastic terms are computed by integrating and advecting strain-rate throughout the fluid. Transition from elastic resistance to viscous flow is controlled by von Mises's yield condition, and subsequent behavior is then governed by a quasi-linear plasticity model.