Does the Acoustic Solver allow subgridding?
I'm trying to do acoustic ultrasound simulations in tissue/water, with air outside, for realistic reflections/interactions at the skin boundary.
The acoustic solver requires very high grid cell counts even for small objects. So far, setting the Background Material to Air, or including a surrounding object of air around the region of interest both increase the grid cell count by ~100x.
The outer air region is only to provide an impedence difference at the phantom/body boundary, to see reflections, so the resolution of the air volume is really not important, just the interaction at the air/body interface.
Is there any way to keep a reasonable grid size, either by subgridding, or voxel priority, or some other method?