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deltaT does not change with pimpleDyMFoam

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Old   June 8, 2016, 03:19
Question deltaT does not change with pimpleDyMFoam
  #1
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Robert Castilla
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Hi,

I am running pimpleDyMFoam with an ACMI interface with this controDict file:

Quote:
application pimpleDyMFoam;

startFrom latestTime;

startTime 0;

//stopAt writeNow;
stopAt endTime;

endTime 0.012;

deltaT 1e-5;

writeControl adjustableRunTime;
//writeControl timeStep;

writeInterval 1e-5;
//writeInterval 1;

purgeWrite 0;

writeFormat ascii;

writePrecision 7;

writeCompression compressed;

timeFormat general;

timePrecision 8;

runTimeModifiable yes;

adjustTimeStep yes;

maxCo 4;

maxDeltaT 1e-5;
But the simulation is running with a constant deltaT of 2e-6 and the courant number keeps below 0.25. Probably it is an stupid stuff, but I cannot find why the solver limits the deltaT.

With best regards

Robert
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Old   June 8, 2016, 05:41
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Hesam
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Hi Robert,

I think you must add #include"readTimeControls.H" and #include"setDeltaT.H"

below time loop in pimpleDymFoam.C.
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Old   June 8, 2016, 06:10
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Robert Castilla
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I, Hesam,

Thanks for your reply. Yes, I though also so. But they are actually included in the solver:

Quote:
while (runTime.run())
{
#include "readControls.H"
#include "CourantNo.H"

#include "setDeltaT.H"

runTime++;

Info<< "Time = " << runTime.timeName() << nl << endl;

...
readControls.H includes the readTimeControls.H

Robert
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Old   June 8, 2016, 06:50
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Robert Castilla
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Hi,

some news: I have disabled the adjustTimeStep, with constant deltaT (although it ignored this deltaT and made the simulation with the same as before, 2e-6), and, then after some time steps, I enabled again the adjustTimeStep and, surprise! it worked! It is a mistery for me...

Robert
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