[ajithnair]

I am trying to povide a ignitionCellSet using toposet and control the duration of ignition source by using fvConstraints in a reactingFoam solver case as below.

--------------------------------------------------------------------------------------

FoamFile
{
format ascii;
class dictionary;
location "system";
object fvConstraints;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

source1
{
type fixedTemperatureConstraint;

timeStart 0.1;
duration 2;

selectionMode cellSet;
cellSet ignitionCells;

mode uniform;

temperature 2000;
}
--------------------------------------------------------------------------------------

But the ignition cellSet remains at 2000 temperature even after the timstep of 2.1. I tried changing the timeStart to 1,2 etc.. but that also doesnot have any change. The cellSet remains at 2000 from start to end of simulation irrespective of timeStart and duration in fvConstraints file. I copied the topoSet and fvConstraints from other tutorial case to the laminar_counterFlowFlame2D case which i have used to build my case.


Do i have to edit any solver code to fix the fvConstraints issue. im using dev version of openFoam.

[alpercftc]

Hi there,
Did you solve that problem? I have same problem too. The heating does not end.

[ajithnair]

The fvConstraint had that problem where time duration did not work. One thing I did is delete the patch and ran after ignition.
But later I moved to fvOptions file and gave ignition through a heat source. You can find the file in chtMultiregionFoam tutorials reverseburner under constant folder

[alpercftc]

Originally Posted by ajithnair

The fvConstraint had that problem where time duration did not work. One thing I did is delete the patch and ran after ignition.
But later I moved to fvOptions file and gave ignition through a heat source. You can find the file in chtMultiregionFoam tutorials reverseburner under constant folder

Thanks for answer.