Sample From Decomposed Case Wo Reconstructing

cagkn · October 31, 2019, 04:55

Hi everyone,

I have a case of a 2D wave flume simulation, that was run with interFoam as decomposed (8 processors) case. (OpenFOAM v1812)

I needed 8 free surface elevation measurements from 8 different lines so I added them as Raw measurements of alpha.water to the functions sections in controlDict. Everything worked great I get my measurements at each time step simultaneously with the simulation but, I need to look a few centimetres before and after of these lines also.

Now I need to re-take those samples but I don't want to reconstruct cases (also I don't have time to reconstruct them neither)

is there any way to get samples from the existing, decomposed model without reconstructing or re-run the whole thing.

Thank you for the answers in advance.

KTG · November 1, 2019, 13:03

Yep, post processing works with mpi and the -parallel flag. So do something like:

mpirun -np 8 interFoam -postProcess -parallel

and it will just run your function objects on all the times.

October 31, 2019, 04:55	Sample From Decomposed Case Wo Reconstructing	#1
cagkn New Member Cagkan Join Date: Aug 2015 Posts: 8 Rep Power: 10	Hi everyone, I have a case of a 2D wave flume simulation, that was run with interFoam as decomposed (8 processors) case. (OpenFOAM v1812) I needed 8 free surface elevation measurements from 8 different lines so I added them as Raw measurements of alpha.water to the functions sections in controlDict. Everything worked great I get my measurements at each time step simultaneously with the simulation but, I need to look a few centimetres before and after of these lines also. Now I need to re-take those samples but I don't want to reconstruct cases (also I don't have time to reconstruct them neither) is there any way to get samples from the existing, decomposed model without reconstructing or re-run the whole thing. Thank you for the answers in advance.

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November 1, 2019, 13:03		#2
KTG Senior Member Abe Join Date: May 2016 Posts: 119 Rep Power: 9	Yep, post processing works with mpi and the -parallel flag. So do something like: mpirun -np 8 interFoam -postProcess -parallel and it will just run your function objects on all the times.