Ansys FreeFlow™ software uses the Smoothed Particle Hydrodynamics (SPH) method to offer a comprehensive platform to simulate single-phase free-surface flows, with two different solver approaches, an implicit incompressible and a weakly compressible. This chapter will help you understand what applications the method is best used for, how to set up your FreeFlow project to make use of the method, and how to analyze the resulting data.