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March 1, 2012, 09:18
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Error in channelFoam Run in parallel
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#1 | |
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Member
supercommandodhruv
Join Date: Sep 2011
Posts: 57
Rep Power: 15  |
Hi,
I am running channelFoam while trying to simulate a flow through a channel having obstructions. The turbulence model is LES and I try to run it on a 4 core machine. However, I am having the following error message, while running it in parallel. Quote:
Can someone help me out here. Thanks, Dhruv. |
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March 2, 2012, 04:13
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#2 |
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Member
Dejan Morar
Join Date: Nov 2010
Posts: 78
Rep Power: 17 |
Hi Dhruv,
Some time ago I also got that error as you because I mapped results from better mesh to coarser one and then did decomposition... LES model could also be a problem. Which one do you use? Just try to play around with different models and meshes. Turbulent channel should be a straightforward case (unless you don't want to repeat DNS results). |
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March 2, 2012, 06:27
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#3 |
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Senior Member
mauricio
Join Date: Jun 2011
Posts: 172
Rep Power: 18 |
Hello dhr!
try decomposing with scotch, it should avoid these segmentation errors i guess Code:
/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: 2.0.1 |
| \\ / A nd | Web: www.OpenFOAM.com |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class dictionary;
note "mesh decomposition control dictionary";
location "system";
object decomposeParDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
numberOfSubdomains 4;
//- Keep owner and neighbour on same processor for faces in zones:
// preserveFaceZones (heater solid1 solid3);
method scotch;
// method ptscotch; // need to active this one to decompose then change back to scotch to run
// method hierarchical;
// method simple;
// method manual;
simpleCoeffs
{
n (2 2 1);
delta 0.001;
}
hierarchicalCoeffs
{
n (2 2 1);
delta 0.001;
order xyz;
}
scotchCoeffs
{
//processorWeights
//(
// 1
// 1
// 1
// 1
//);
//writeGraph true;
//strategy "b";
}
manualCoeffs
{
dataFile "decompositionData";
}
//// Is the case distributed
//distributed yes;
//// Per slave (so nProcs-1 entries) the directory above the case.
//roots
//(
// "/tmp"
// "/tmp"
//);
// ************************************************************************* //
hope it helps! /calim |
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March 2, 2012, 06:36
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#4 |
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Senior Member
A_R
Join Date: Jun 2009
Posts: 122
Rep Power: 17 |
Dear dhrv
you have problem with segmentation. firstly, check your decomposition file that has 4 parts not other numbers. then use decompose -force to decompose it again. |
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rintStack(Foam::Ostream&)Foam::error :
Linear Mode
