Technical Papers Fast-Forward :
The Reduced Immersed Method for Real-Time Fluid-Elastic Solid Interaction and Contact Simulation
Technical Papers Fast-Forward
TimeSunday, 17 November 201918:50 - 18:51
LocationGreat Hall 1&2
DescriptionWe introduce the Reduced Immersed Method (RIM) for the real-time simulation of two-way coupled incompressible fluids and elastic solids and the interaction of multiple deformables with (self-)collisions. Our framework is based on a novel discretization of the immersed boundary equations of motion, in which fluid and deformables are modeled as a single incompressible medium, and their interaction is modeled through a unified system on a fixed domain, where Eulerian and Lagrangian terms are combined. One advantage for real-time simulations resulting from this modeling is that two-way coupling phenomena can be faithfully simulated while avoiding costly calculations such as tracking the deforming fluid-solid interfaces and the associated fluid boundary conditions. Our discretization enables the combination of a PIC/FLIP variant with a reduced-order Lagrangian elasticity formulation. Crucial for the performance of RIM is the efficient transfer of information between the elasticity and the fluid solver and the synchronization of the Lagrangian and Eulerian settings. We introduce the concept of twin subspaces that enables an efficient reduced-order modeling of the transfer. Our experiments demonstrate that RIM handles complex meshes and highly resolved fluids for large time steps in high framerates on off-the-shelf hardware, even in the presence of high velocities and rapid user interaction. Furthermore, it extends reduced-order finite elements elasticity solvers such as Hyper-Reduced Projective Dynamics with natural collision handling.