We have been using cosmosfloworks2004 for 2~3 month.
So my suggestion maybe useful or maybe not.
Cosmosfloworks is a design based CFD software , so you can't get exact solution from it . It just solve problems with some considerations and this will result a good rough estimation.
We are using the cosmosfloworks to analyse the manifold systems in a diesel engine to solve the air and smoke path and some othe parameters such as temp,pressure , ...
But it seems cosmosfloworks hasn't enough B.C. to define the real conditions.
We are going to compare cosmofloworks and fluent in our field to choose one for next analysis. And our teamwork will solving similar problems in both and comparing the results .
Best regard