I would be very excited if the Simulation workspace were able to include a gas within the the modal frequency analysis. For example, when building loudspeakers it would be useful to know the effect of the air enclosed within the box on the modal distribution within the speaker cabinet.
As it is right now, I can create a body based out of the internal void of the cabinet, and then change the physical material of that body to "Air", but simulation does not allow me to include that material in the study. (I get a warning saying the material is not allowed.)
Perhaps this is a bit of a niche request but I imagine it would be useful for people in other fields as well.
