[michel1988]

Dear all,
I want to calculate the mean velocity profile for channel flow. For the moment, I can do it with postChannel utility which performs a spatial average for a given moment. How to do it with time average over a range of time in OpenFOAM? I am new to OpenFOAM and I am not familiar with the utilities.
Thanks for your help!

[alireza94]

Originally Posted by michel1988

Dear all,
I want to calculate the mean velocity profile for channel flow. For the moment, I can do it with postChannel utility which performs a spatial average for a given moment. How to do it with time average over a range of time in OpenFOAM? I am new to OpenFOAM and I am not familiar with the utilities.
Thanks for your help!

Hi michel


i know this topic is very old but i'm eager to know, did you find a solution for you problem?

[calf.Z]

fieldAverage maybe work.

[Bazinga]

fieldAverage does the trick. Add the following code (works with OpenFOAM 6) to your controlDict and adjust writeControl, writeInterval, timeStart and the fields.

functions
{
fieldAverage
        {
        type fieldAverage;
        functionObjectLibs ("libfieldFunctionObjects.so");
        enabled true;
        writeControl     writeTime;
        writeInterval    1;
        timeStart 5;
        fields
        (
                U
                {
                mean on;
                prime2Mean on;
                base time;
                }
               
        );
}
}