. A complex multiphysics simulation involving viscoelastic fluids, rigid bodies, and deformable bodies. We simulate whipped cream and strawberry syrup efficiently using our novel viscoelasticity model based on conformation constraints. The complete scene consists of 150,000 particles and runs at 1.13 seconds per frame. The simulation of high viscoelasticity poses important computational challenges. One is the difficulty to robustly measure strain and its derivatives in a medium without permanent structure. Another is the high stiffness of the governing differential equations. Solutions that tackle these challenges exist, but they are computationally slow. We propose a constraint-based model of viscoelasticity that enables efficient simulation of highly viscous and viscoelastic phenomena. Our model reformulates, in a constraint-based fashion, a constitutive model of viscoelasticity for polymeric fluids, which defines simple governing equations for a conformation tensor. The model can represent a diverse palette of materials, spanning elastoplastic, highly viscous, and inviscid liquid behaviors. In addition, we have designed a constrained dynamics solver that extends the position-based dynamics method to handle efficiently both position-based and velocity-based constraints. We show results that range from interactive simulation of viscoelastic effects to large-scale simulation of high viscosity with competitive performance.
REF developed a constrained dynamics solver by extending position based dynamics method to represent whipped cream and strawberry syrup.
Conformation constraints for efficient viscoelastic fluid simulation
TOGS
Mathematics Computer Science