Noted on the above.nI read in theory guide that the solid shear viscosity is the sum of collisional, kinetic and frictional viscosity. For my case frictional viscosity is negligible. So the granular viscosity specifies the sum of kinetic and collisional viscosity. nFor my case, the particle viscosity is a function of particle volume fraction and fluid viscosity. So I have prepared a udf to calculate particle viscosity for the solid particle in 'material panel'. So should be okay to use the same udf in the phase panel in granular viscosity input right?nIn user guide, it says that the udf for granular viscosity must include the kinetic portion and the collisional portion of the viscosity in the value it returns.nThanksnn