CFD Online Discussion Forums - [mesh manipulation] decomposePar results in a weired procBoundary

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decomposePar results in a weired procBoundary

as you see from the attachment, the procBoundary is not flat. How can i get a flat procBoundary? thank you.

ps. my decomposeParDic as follows.

Code:

numberOfSubdomains 5;



method          simple;



simpleCoeffs

{

    n               ( 5 1 1 );

    delta           0.001;

}

Hi,

I you have some specific requirements on the decomposition, e.g. flat processor boundaries, then I suggest that you use the manual decomposition method, where you specify, which processors the individual cells belong to.

It is a quite simple operation, which you could e.g. based on the cell centres, which you can obtain based on

Code:

writeCellCentres

Kind regards,

Niels

Quote:

Originally Posted by ngj (Post 414135)

Code:

writeCellCentres

Kind regards,

Niels

thank u Niels. :)I got it, with a modified writeCellCentre file. just add a few lines:

Code:

forAll(cci, cellID)

{

    pid = (int)(cci[cellID]/LX);    //cellID belongs to which process

    fprintf(fSrc, "%d\n", pid);    //output

    sum[pid]++;            //sum

}

the dataFile is：

Code:

FoamFile

{

version 2.0;

format ascii;

class labelList;

location "constant";

object decompDict;

}

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

124218    //number of cells

(

3    // first cell belongs to process 3

0    // second cell belongs to process 0

...

x    // the cell belongs to process x

2    // last cell belongs to process 2

)

Hi

This thread has a nice description of how to create the file for manual decomposition:

http://www.cfd-online.com/Forums/ope...computing.html

/ Niels