[Turhan]

Dear all,

I'm running a code that shows a flow through a pipeline
In order to see what the mass flow is through the pipe I've written the following code:

MassFlow
{
type surfaceFieldValue;
libs (fieldFunctionObjects);
enabled true;
writeControl writeTime;
log true;
writeFields false;
regionType patch;
name inlet;
operation average;

fields
(
phi U p
);
}

Here I've written average at the operation. But what is it exactly taking the average of? Is it summing the phi, U and p on each point of the patch I've chosen? Or is it averaging the variables at each timestep?

To compare results, I had rerunned the simulation with "operation none;" instead, but that gave me a blank page.