this is the model. I need to calculate the average pressure in "interior-valve", but the problem is that the code calculates a lot of pressure data for each iteration (as you can see in the secong image), so, I will obtain hundreds of pressure data for each time step (due to each time step contains a certain number of iterations), I was already able to make that the code calculate only in the first iteration of each time step, but I still can't get the code to calculate just one pressure data (average pressure on a face) in one iteration.