Dear Expert,
I am solving a 2D TFM case, using wall BC (specularity coefficient) and viscous stress model, and using a custom drag model, but when I run this, the following error comes DT < DT_MIN. Recovery is not possible! I think the simulation is not converging.
I checked my geometry meshing, BC, and Numerical value, material properties but the error is the same. could you tell me how I can solve it?
I want to use the specularity coefficient for calculating the effect of wall and particle contact. How can I modify this in the simulation?
emms44_2024-03-16T152129.066277.zip (58.1 MB)