Hi Everybody, first post

For a project I am doing I need a electronic simulation were I can build/import a shape and test it's aerodynamics. I also need the figures for it's air resistance and the coefficient of it's fluid drag.Preferable I would like to be able to use nanotechnology on the surface of the object, but that would be a bonus. I would really appreciate suggestion as to what software is best for this sort of electronic testing, it doesn't have to be free as I will need to use it in future and would rather have a general solution for a long time than a cheep program that doesn't have a lot of features, but does have exactly what I need now.
Thank you all,
David