Hello, I am searching for free cfd-codes that fullfill the following requirements : - 3D inkompressible, (isothermal) RANS Code - well-tested, ideally with an active "community" of users - Free Source code access (preferably fortran) - can use unstructured grids - has different well-tested 2-eq RANS turbulence models (at least k-epsilon, k-omega) - Possibility to easily use different roughness as wall boundary condition

Can anyone recommend free cfd codes with these characteristics?

with best regards, Karsten

It sounds a bit like I want a code where I get payed for using it

You might use OpenFoam for that purpose.

Try this one:

http://www.dolfyn.net/index_en.html

I think, it'll fit most of your requirements

Regards

Renato.