Issue link: https://resources.randsim.com/i/1543873
©2026 ANSYS, Inc. 15 IISPH promotion to main feature After months of extensive testing, the Implicit Incompressible SPH solver had its Beta flag removed. It has also become the default solver for SPH cases (however, users are still able to use the Weakly Compressible SPH solver). IISPH is more efficient than the WCSPH solver, since its timestep is usually up to one order of magnitude higher than the WCSPH's timestep, without losing accuracy.