Simulating Vents

Vent patterns are commonly used in electronic (sheet metal orplastic) enclosures. These patterns can be made up of dozens, ifnot hundreds of holes/slots. Does anyone have experience withcreating a vent pattern in CosmosFlo that yields an equivalentpattern? Creating a lid for each hole would be extremely timeconsuming and tedious. There must be a simpler way to do this.

Thanks in advance.SolidworksFlow Simulation