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Old   June 21, 2011, 09:30
Default need help
  #1
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gaofeng
Join Date: Jun 2011
Posts: 19
Rep Power: 6
windwin is on a distinguished road
hi guys
i just begin to use openfoam for some simulition, and some problems that i cannot understand made me so crazy ,unfortunately the tutoriel didnt help too much so i rly need your help , thank you

the following is my blockmeshdict:



/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: 1.6 |
| \\ / A nd | Web: http://www.OpenFOAM.org |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class dictionary;
object blockMeshDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

convertToMeters 0.01;



vertices // definition des points
(
(0 0 0) //0
(235 0 0) //1
(265 0 0) //2
(500 0 0) //3
(0 20 0) //4
(235 20 0) //5
(0 180 0 ) //6
(235 180 0) //7
(265 180 0) //8
(500 180 0)//9
(0 200 0) //10
(500 200 0) //11
(0 0 200) //12
(235 0 200) //13
(265 0 200) //14
(500 0 200) //15
(0 20 200) //16
(235 20 200) //17
(0 180 200) //18
(235 180 200) //19
(265 180 200) //20
(500 180 200) //21
(0 200 200) //22
(500 200 200) //23
);
blocks
(
hex (0 1 5 4 12 13 17 16) (235 20 1) simpleGrading (1 1 1)
hex (4 5 7 6 16 17 19 18) (235 160 1) simpleGrading (1 1 1)
hex (1 2 8 7 13 14 20 19) (30 180 1) simpleGrading (1 1 1)
hex (2 3 9 8 14 15 21 20) (235 180 1) simpleGrading (1 1 1)
hex (6 9 11 10 18 21 23 22) (500 20 1) simpleGrading (1 1 1)
);
patches
(

patch fixedWalls
(
(10 22 23 11)
(22 10 6 18)
(18 6 4 16)
(21 15 3 9)
(0 1 13 12)
(2 3 15 14)
)

patch entree
(
(1 2 14 13)
)

patch sortie
(
(16 4 0 12)
(11 23 21 9)
)

empty front
(
(16 12 13 17)
(18 16 17 19)
(13 14 20 19)
(20 14 15 21)
(22 18 21 23)
)

empty back
(
(0 4 5 1)
(4 6 7 5)
(1 7 8 2)
(2 8 9 3)
(10 11 9 6)
)

);




i run blockMesh and every thing is ok, but when i run icoFoam ,i get the following error message:

--> FOAM FATAL ERROR:
This mesh contains patches of type empty but is not 1D or 2D
by virtue of the fact that the number of faces of this
empty patch is not divisible by the number of cells.

From function emptyFvPatchField<Type>::updateCoeffs()
in file fields/fvPatchFields/constraint/empty/emptyFvPatchField.C at line 150.



so can somebody tell me what problem it is and how i can fix it

thank you very much
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Old   June 21, 2011, 09:44
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  #2
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David GISEN
Join Date: Jul 2009
Location: Germany
Posts: 37
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Look at your Mesh in Paraview, maybe you see an obvious mistake. i guess some points are mixed up.
PS: your post looks like you were in a hurry, is that true?
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Old   June 21, 2011, 09:47
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  #3
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gaofeng
Join Date: Jun 2011
Posts: 19
Rep Power: 6
windwin is on a distinguished road
hi david

hehe, you are right , i must figure it out quickly for my intership :s
ok i will check it in paraview like you said
thank you for your advice
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