change/increase maxCo

openfoam_user · February 27, 2012, 06:13

Hi all,

how can I change the maxCo (controlDict) during a calculation.

I want to start my computation with a low maxCo value. And after some iterations change it and increase it a little bit and so on.

Is there an easy way to do this?

Regards,
Stephane.

alberto · February 28, 2012, 04:09

You can change it directly by editing the controlDict. A default installation of OpenFOAM should detect the change at the next time-step.

openfoam_user · February 28, 2012, 12:54

Hi Alberto,

I know that I can modify the controlDict file during the computation.

But I would prefer to have something like a script in order to leave my case running in batch mode ?

Don't know if there is a nice way to do it.

Regards,
Stéphane.

alberto · February 28, 2012, 12:59

Quote:

Originally Posted by openfoam_user

Hi Alberto,

I know that I can modify the controlDict file during the computation.

But I would prefer to have something like a script in order to leave my case running in batch mode ?

Don't know if there is a nice way to do it.

Regards,
Stéphane.

You could write a script to replace the line containing maxCo with the line containing the new maxCo, as long as a complete controlDict is always present on the disk during the operation (if not, the trun would fail).

February 27, 2012, 06:13	change/increase maxCo	#1
openfoam_user Senior Member stephane sanchi Join Date: Mar 2009 Posts: 314 Rep Power: 18	Hi all, how can I change the maxCo (controlDict) during a calculation. I want to start my computation with a low maxCo value. And after some iterations change it and increase it a little bit and so on. Is there an easy way to do this? Regards, Stephane.

February 28, 2012, 04:09		#2
alberto Senior Member Alberto Passalacqua Join Date: Mar 2009 Location: Ames, Iowa, United States Posts: 1,912 Rep Power: 36	You can change it directly by editing the controlDict. A default installation of OpenFOAM should detect the change at the next time-step. __________________ Alberto Passalacqua GeekoCFD - A free distribution based on openSUSE 64 bit with CFD tools, including OpenFOAM. Available as in both physical and virtual formats (current status: http://albertopassalacqua.com/?p=1541) OpenQBMM - An open-source implementation of quadrature-based moment methods. To obtain more accurate answers, please specify the version of OpenFOAM you are using.

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February 28, 2012, 12:54		#3
openfoam_user Senior Member stephane sanchi Join Date: Mar 2009 Posts: 314 Rep Power: 18	Hi Alberto, I know that I can modify the controlDict file during the computation. But I would prefer to have something like a script in order to leave my case running in batch mode ? Don't know if there is a nice way to do it. Regards, Stéphane.