Efficient GPU-based implementation of a Pressure Solver for Incompressible SPH Fluid Simulations

To simulate incompressible flows using SPH, one has to use a discretitized variant of the NavierStokes-Equations for particles. To reach a stable and convergant simulation, the timestep has to be severly limited, especially through the pressure term. To dampen this limitation, various approaches where developed in computergraphics. One of these approaches is the Implicit Incompressible SPH (IISPH), which solves the pressure term by solving a set of linear equations in an efficient manner. The topic of this work is to implement the IISPH-solver into an existing SPH-framework and to evaluate the performance of the solver inside the framework. This proposed implementation lead to a speedup that was within the region of expected increase, reaching 3 times an bigger speedups in some scenarios. The existing framework is written in C++ and CUDA.