What is the function of “Search grid partition (optional)” in solids pane, DEM sub-pane? IMAX, JMAX and KMAX need to be defined. In what cases shall we define them?
If you hover your mouse on a control, you should see a tooltip:
The number of cells (des grid) does not need to be defined. If left blank, it will be set so the grid spacing is three times the max particle diameter. You can define it to change the des grid spacing. Larger spacing means less des grid cells but more particles per cells. It is recommended to leave it blank. If you want to change it, you may need to experiment to see if it helps or hurt the speed of the simulation.
Thanks for your careful response, I get it.