In SW2013 with Flowsim 2013 it is done like this:
Top toolbar > Flow Simulation > Component control
Un-tick the boxes in each row of your lid parts. (These should be called LID1-1 LID2-1.... etc... )
They should then be omitted from the study.
Thank you for the response. I tried to do that but when I un-tick the lids, it seems that the geometry created by the lids unresolves and that the bondary condition that was on the surface of the lid is deactivated.
Is there a way to prevent that?
Without looking at your project, I am only guessing. It is probably best not to use lids to define the fluid domain.
Could you instead create a new configuration of the part containing the holes, and suppress your hole features?
Unless you specifically need a fluid to flow through the holes that would work. However, If you need the fluid to flow through those holes why create a fluid boundary there?
I have those lids to define the domain of the fluid and the fluid is flowing through those holes. I actually found a way to suppress the lids from the heat analysis by defining its material as an insulator. I used to use another program before for CFD simulation and you could apply the boundary condition directly to the fluid once the fluid domain was created but I don't think there is a way to do that with Solidworks. Or is there?
Thank you very much for all your help, it is much appreciated!