I am trying to simulate the particle sedimentation in water using CFD-DEM approach. I have defined a user-defined function for density of water (varies with temperature as in Boussinesq approximation). If I use constant density of water (i.e. 1000 kg/m^3), then the simulation runs. However, if I use the user-defined density, I get an error of DT < DTmin (recovery not possible).
I have attached the files. Kindly help me resolve the issue.
Thank You
fluid_bed_dem_2d - water - ht - udf.zip (30.0 MB)