[olher3]

Hello,

after a 6 year break, I currently have an OpenFOAM project again. For this I use the latest version v2012.
Unfortunately, the keywords have changed over time. I have a model with 4 outlets (out1, out2, out3, out4) I would like to monitor the volume flow [m³/s] or mass flow [kg/s] on these during the simulation.


Solver: simpleFoam


Can someone give me an example of the function in the controlDict?
My old spelling no longer works.



Best wishes

O.Herz

[Tobermory]

The fieldFunction that you are after is surfaceFieldValue, I think (https://www.openfoam.com/documentati...ieldValue.html). Here's an example of its use for a case where I wanted the massflow-weighted average values of two scalars on a patch called outlet:

functions
{
    surfaceFieldValue1
    {
        type            surfaceFieldValue;
        libs            ("libfieldFunctionObjects.so");
        enabled         yes;
        writeControl    writeTime;
        log             yes;
        writeFields     no;
        regionType      patch;
        name            outlet;
        operation       weightedAverage;
        weightField     phi;
        fields
        (
            H2O
            T
        );
    }
}

For your application, change out weightedAverage for sum, change the field to phi, and adjust the patch name. You get the idea, hopefully. Good luck.

[olher3]

Hello,


thanky you very much.
It works!


Best Regards


O.Herz

[popopo]

How do I write this to a file, say flowrate.txt?


Thanks!