Aeolus Consulting offers smaller and larger companies state-of-the-art Computational Fluid Dynamics simulations and general advices about CFD.
This website gives you some general informations, but it can never replace a person to person conversation...

Computational Fluid Dynamics (CFD) is used to investigate a wide range of flows, from low speed flows such as natural convection in large industrial buildings, underground car parking ventilation, wind turbine studies, to the highly compressible aerodynamic phenomena associated with high speed aircraft (and much more...)