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Time-averaging of fields doubt

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Old   July 31, 2016, 12:07
Question Time-averaging of fields doubt
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Max Vorstadt
Join Date: May 2016
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Hi! I would like to ask a question regarding the time-averaging of the main fields of a simulation. Let's say I have a simulation running from time 0 to 1 seconds, but the results did not converge for enough time yet so I want to run it up to 1.5 seconds to prove the convergence.

My controlDict looks like this:

Code:
functions
{
meanValues
    {
        type            fieldAverage;
        functionObjectLibs ("libfieldFunctionObjects.so");
        enabled                 true;
        cleanRestart            false;
        outputControl           outputTime;
        resetOnOutput           false;
        resetOnRestart          false;
        fields
        (
            U
            {
                mean        on;
                prime2Mean  off;
                base        time;
            }
        )
    }
}
My two questions are:
  • How can I indicate that I want it to average from 0.7 (let's say here it begins to converge) and up to 1.5 seconds?
  • If I am already at time 1 seconds and I indicate that the average begins at 0.7, will it work or does it need to average from the moment the simulation is (re)started? I mean, in my case, does it need to start at t=1 if I'm at that point already or can I restart the simulation at t=1 but also starting the average taking into account previous values (from t=0.7)?

Thanks in advance!
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averaging, controldict, field average, mean flow field

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