Creating containers for TurbulenceFD usually means sticking with the default box that's generated when you hit Add Container. It doesn't have to be that way, you can use any other shape you want, but you need to stick to certain rules.

  1. You need to make a proper container - a single-sided sphere isn't enough, but one with a wall? That's good
  2. In general for emitters and collision objects in TFD: the thickness of the objects must be larger than the voxel size (they must be “fillable” with voxels. a 1 x 1 meter voxel will not fit into a 10 x 10 centimeter container object).
  3. You still need to add a standard container that encloses your collision object.

Using a sphere for a TFD container