HOw to change the input velocity in the middle of a run in parallel processing?

sinhavivekananda318 · April 17, 2018, 06:43

Hello all,
I am running a parallel processing having 4 processors in openFoam.I am using interFoam solver. Now I want to change the input velocity value in the middle of this run.Is there any way? Had it been a simple run, I would have changed the value in the 0 folder and it would automatically adjust. But as this is a parallel precessing this is not happening..any idea would be helpful...

Thanks

pete20r2 · April 18, 2018, 10:58

Hi Vivekananda,
The most straight forward way is to reconstruct the job, use the changeDictionary utility to operate on the lastestTime, then decompose again.
so you could execute
reconstructPar -time latestTime
changeDictonary -time latestTime
decomposePar -force -time latestTime
and carry on calculation

See the tutorial in tutorials/heatTransfer/chtMultiRegionFoam/multiRegionHeater
for how to use the changeDictionaryDict that needs to be supplied.

You can turn this into a little bash script and leave it in the root of you case.

April 17, 2018, 06:43	HOw to change the input velocity in the middle of a run in parallel processing?	#1
sinhavivekananda318 New Member Vivekananda Join Date: May 2017 Location: Cardiff, UK Posts: 26 Rep Power: 8	Hello all, I am running a parallel processing having 4 processors in openFoam.I am using interFoam solver. Now I want to change the input velocity value in the middle of this run.Is there any way? Had it been a simple run, I would have changed the value in the 0 folder and it would automatically adjust. But as this is a parallel precessing this is not happening..any idea would be helpful... Thanks

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April 18, 2018, 10:58		#2
pete20r2 Senior Member Peter Baskovich Join Date: Jul 2014 Posts: 127 Rep Power: 11	Hi Vivekananda, The most straight forward way is to reconstruct the job, use the changeDictionary utility to operate on the lastestTime, then decompose again. so you could execute reconstructPar -time latestTime changeDictonary -time latestTime decomposePar -force -time latestTime and carry on calculation See the tutorial in tutorials/heatTransfer/chtMultiRegionFoam/multiRegionHeater for how to use the changeDictionaryDict that needs to be supplied. You can turn this into a little bash script and leave it in the root of you case.