I am looking for the most realistic way to model Air Coolers in CAESAR II, especially the restraint of the header box.

In this case, I have a double pass air cooler with split header boxes for inlet and outlet, and two nozzles per box.

One way to model the header box and connection to nozzles, is as a rigid without weight and a restraint in the center of the header box.

In terms on the header box's restraint, which is my concern, it may be indicated with X, Y & Z restraints, and no rotation restraint. Is this the best approach?

Please advice.

Pablo Guerra
Pablo Guerra