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-   -   SnappyHexmesh error (http://www.cfd-online.com/Forums/openfoam-meshing-snappyhexmesh/119217-snappyhexmesh-error.html)

yiwang25 June 12, 2013 07:53

SnappyHexmesh error
 
1 Attachment(s)
Hi, foamers:

Firstly, I used SnappyHexmeshDict to refine mesh and remove a small cylinder. And then I used toposet to define some faces. Allrun is:
#!/bin/sh
# Source tutorial run functions
. $WM_PROJECT_DIR/bin/tools/RunFunctions
# Set application name
application=`getApplication`
rm -rf constant/polyMesh/*.gz
rm -rf constant/polyMesh/sets
rm -rf 0/polyMesh
rm -rf 0/*.gz
rm -f log.blockMesh
runApplication blockMesh
rm -f log.snappyHexMesh
runApplication snappyHexMesh -overwrite
rm -f log.topoSet
runApplication topoSet
rm -f log.createPatch
runApplication createPatch -overwrite


when I decompose, the errors occured as follows


........
Processor 31
Number of cells = 46723
Number of faces shared with processor 27 = 657
Number of faces shared with processor 29 = 1870
Number of faces shared with processor 30 = 1855
Number of processor patches = 3
Number of processor faces = 4382
Number of boundary faces = 4368
Number of processor faces = 86026
Max number of cells = 46723 (0.0131109% above average 46716.9)
Max number of processor patches = 6 (11.6279% above average 5.375)
Max number of faces between processors = 5875 (9.26929% above average 5376.62)
Time = 0

--> FOAM FATAL IO ERROR:
size 75000 is not equal to the given value of 67500
file: /home/ku47897/OpenFOAM/chjwang/fire/two_fuel/fireswirl/temp2/0/ccz::boundaryField::sides from line 1497479 to line 1497480.
From function Field<Type>::Field(const word& keyword, const dictionary&, const label)
in file /home/ku47897/OpenFOAM/OpenFOAM-2.1.y/src/OpenFOAM/lnInclude/Field.C at line 236.


would you like to tell me what is the problem? How to recitfy it?
Attached are the files including blockmeshdict, toposetdict, createPatchdict, snappyhexdict, Allrun.

Thanks

yiwang25

cutter June 12, 2013 09:09

I might be wrong but I believe is this due to the presence of an old mesh with a different number of cells. Try to delete the old mesh (not the input files as blockMeshDict etc.; make a backup first!!!) and start your meshing script again.

Cutter

yiwang25 June 12, 2013 10:28

Hi, Cutter, Thank you.
But I have done this many time. Cleaned all files every time and started again.
This problem is still there.

yiwang25

wyldckat June 16, 2013 16:07

Greetings to all!

@ yiwang25: Run this command:
Code:

rm 0/cc*
It will remove the files "ccx", "ccy" and "ccz", which are created by snappyHexMesh, if I'm not mistaken, and are useless unless you want to do some debugging.

Best regards,
Bruno


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