There are 16 thin swirl blades in my model, which are quite different from the overall size, so it is difficult to divide the cut mesh. Now I export the swirl blade separately file(.stl), hoping to achieve the impenetrable effect of air flow and particles hitting the blade.
I tried the internal surfaces function, but it doesn’t seem to select the file(.stl) that the user imported. Please kindly learned little friends, is there any way to solve my difficulties?