"A Method for Animating Viscoelastic Fluids"

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 Misesís yield condition, and subsequent behavior is then governed by a quasi-linear plasticity model.

T. G. Goktekin, A. W. Bargteil, J. F. O'Brien,
"A Method for Animating Viscoelastic Fluids."
ACM Transactions on Graphics (ACM SIGGRAPH), vol. 23, pp. 463-467, August 2004.

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