Issue link: https://resources.randsim.com/i/1543873
©2026 ANSYS, Inc. 14 SPH Implicit Viscous Forces (Beta) With the new SPH Implicit Viscous Forces calculation*, available for both Newtonian and Non-Newtonian fluids Rocky provides an efficient way of simulating high viscosity fluids, which were unfeasible with the explicit formulation due to the small timestep. Variable viscosity of the fluid due to its Non-Newtonian behavior. *Valid for DEM-SPH simulations as well.