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-   -   Metis decomposeParDict problem certain patches on one processor (http://www.cfd-online.com/Forums/openfoam-solving/58608-metis-decomposepardict-problem-certain-patches-one-processor.html)

diana August 27, 2008 05:14

Hi, I have a case, where in
 
Hi,

I have a case, where in parallel processing certain patches have to be on one processor. I can't use simple or hierarchical as decomposition methods because there I get error messages concerning cellfaces on different processors.

How can I define in metis that certain areas or certain patches have to be on one processor?

Or how do I define in metis cutting directions?

I would be glad for any help!!

Bye
Diana

gschaider August 27, 2008 05:41

Hi Diana! The "easiest" way
 
Hi Diana!

The "easiest" way is to use the manual decomposition method.

You'll have to write a utility that assigns every cell to one processor and writes out a list to a file. The manual decompositon method needs that list as a parameter and will only generate the processor-meshes based on that information. All the balancing etc has to be done by your utility.

Bernhard

diana August 27, 2008 06:15

Hi Bernhard, thanks for you
 
Hi Bernhard,

thanks for your tip!

I had the same idea, but I never found an information how the datafile has to look like.

Can you show me or say how to find information on this?

Bye
Diana

duongquaphim September 9, 2009 05:33

Hi Diana,

I am a new user of OpenFoam and I am also finding a way to construct a manual data file. Do you find a way to manage this problem?

Thanks

Duong


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