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Accessing alpha.oldTime() in multiphaseMixture

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Old   August 20, 2012, 15:39
Question Accessing alpha.oldTime() in multiphaseMixture
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Tyler V
Join Date: Jul 2012
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I am trying to access old time values of alpha in multiphaseMixture in multiphaseInterFoam but it does not seem to be accessible by the standard "oldTime()" convention. As a test, I have added the following in multiphaseMixture::solveAlphas in the base multiphaseInterFoam solver (no other modifications):

    forAllIter(PtrDictionary<phase>, phases_, iter)
        phase& alpha = iter();

        //Added these two lines to see what's going on
        Info<< "Max delta(alpha"<<<<") = "
             << Foam::max(mag(alpha.field() - alpha.oldTime().field())) << endl;

        //the rest of the function is un-modified
This prints 0 every time, even when alpha is changing with time (running on the damBreak4phase example). Why is this not picking up the old time values, and how is MULES::explicitSolve then able to access those values? How should I be calling this to get the old time values??
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multiphaseinterfoam, oldtime

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