HVAC diffusers have air flow patterns much like light fixtures have photometric patterns.

Air Diffuser manufacturers supply the pattern shapes and provide the distances in feet for airflow velocities at 150FPM, 100FPM and 50FPM for heating and cooling.

Is there a way you can give the DM user the ability to insert their own airflow pattern (through a formatted file input) with contour lines similar to DM photo metrics?

This would be DM's start into Computational Fluid Dynamics.