How to run lengthy simulations?

sergimart7 · August 14, 2015, 02:20

Dear Foamers,

I have one rapid question.
I am currently simulating with chtMultiRegionFoam and the case I'm currently running I know that needs about 2 hours of real time to converge because that is what it takes in the actually experiment.

Upon simulationg in OpenFOAM, the largest time step I could put in oirder to ron smoothly is 0.1s and the simulation runs about 1 minute of simulation for an hour in real time.

There is a way to get faster in order to reach the 1 - 2 hours of simulated time in less than one day in real life?
Do you need more info like codes?

Thank you very much.

sergimart7 · August 14, 2015, 14:41

Can somebody help me please? =)

pruthvi1991 · August 15, 2015, 16:43

Hello sergi,

Can you show the mesh? It very hard to help with the little information you provided. Go through this thread -----> How to give enough info to get help

The most obvious solution is to use a very simple model which doesn't capture all the physics involved.

Another way is to run the simulation on multiple cores. This might speed up the computation a bit. However, it depends on the inter-dependency of the domain.

Thanks,
Pru.

August 14, 2015, 02:20	How to run lengthy simulations?	#1
sergimart7 New Member S. Martinez Join Date: May 2014 Posts: 8 Rep Power: 12	Dear Foamers, I have one rapid question. I am currently simulating with chtMultiRegionFoam and the case I'm currently running I know that needs about 2 hours of real time to converge because that is what it takes in the actually experiment. Upon simulationg in OpenFOAM, the largest time step I could put in oirder to ron smoothly is 0.1s and the simulation runs about 1 minute of simulation for an hour in real time. There is a way to get faster in order to reach the 1 - 2 hours of simulated time in less than one day in real life? Do you need more info like codes? Thank you very much.

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August 14, 2015, 14:41		#2
sergimart7 New Member S. Martinez Join Date: May 2014 Posts: 8 Rep Power: 12	Can somebody help me please? =)

August 15, 2015, 16:43		#3
pruthvi1991 Member Pruthvi Join Date: Feb 2014 Posts: 41 Rep Power: 12	Hello sergi, Can you show the mesh? It very hard to help with the little information you provided. Go through this thread -----> How to give enough info to get help The most obvious solution is to use a very simple model which doesn't capture all the physics involved. Another way is to run the simulation on multiple cores. This might speed up the computation a bit. However, it depends on the inter-dependency of the domain. Thanks, Pru.