Hello juantxu,
With BlueKenue you should be able to define the
types of boundary conditions in your model (The tutorial is not available on the
NRC website, but can be found
here).
Values to be imposed are prescribed in the CAS file (for constant values), in a file (temporal evolution) or in a subroutine.
But you should be careful with boundary types and boundaries numbering.
I fear there is not a complete test case, but you can have a look at some of them: V, stratification, ... (see the folder "examples" in the svn repository)
Hope it helps,
Best Regards