Dear Steve,

Thanks for posting here.

It actually is a combination of all three.

If you recall we did real-world tests for a client in Sweden. 

This resulted in two subsequent contacts for modeling with two other clients. (And a third opportunity that wants to by-pass modeling altogether).

In the modelling we do we use Computation Fluid Dynamics (CFD) modeling. We have also developed our own models running on top of commercial software.  As you can probably appreciate, this is a relatively unique expertise as we have the plasma simulation expertise in house which is hard to find anywhere else.

Hope that helps

Peter