COSMOL

Free software, it can be useful.


Modelling

Flow Modelling Simulation

Computer simulation of flow and heat transfer improves customers’ profitability through improved designs, better quality products, higher production rates and shorter lead times. It provides cost effective solutions, reducing the need for prototypes and experiments enabling ‘right first time’ designs based on increased understanding of products and processes

http://www.acel.co.uk/CFD_consulting.html

surf  COSMOL web and you will find good software applications and services.
:-)