you need to compute your own characteristic for the PM and then put it in. I have done this in studies and it work fine and mimics reality quite well. I have a small little wind tunnel that I used to compute pressure drop vs. flow rate for whatever perf pattern I have over the velocity range of interest. The new parameter study is very handy for running the sets and giving me a plot of the characteristic.
Why they don't allow a generalized perf model for inclusion anywhere you want is inobvious to me. Should be easy at least under some set of reasonable assumptions.
I'm gonna do the same thing to check if my Used Defined PM's are operating well.
Agree your last remark.
Should be nice and more obvious to allow a perf.plate anywhere in a flow model.
The way to define a perf. plate has more similarity with the real stuff.
But now I know how to deal with it.
Enjoy your day.
If the pressure drops are strong across a PM you will need to have a dense enough mesh across the PM. The depth of the PM model geometry does not need to be the same as the depth of the actual PM if it is quite thin in the flow direction. It is obvious how to do this - you just change the reference depth to whatever you want to use in the model.