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Old   June 8, 2011, 23:23
Unhappy Help face 0 in patch 0 does not have neighbour
  #1
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Gregoire Junqua
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Hi everybody
I had search the rule for create a blockMeshDict. but i am facing this problem

face 0 in patch 0 does not have neighbour cell face: 4(0 1 2 3)

I want to know exactly the meaning of it because right now i am programming a script for creating automatically the blockMeshDict.
I had see that there is a same prob in this forum but I didn't understood clearly ...

Is there any documentation about it?

by the way i am trying to put a topography in fluent... but i didn t find a software able to do it.... if somebody know one i would be happy to know it and try

best regards

Greg
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Old   June 9, 2011, 02:57
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it means that the points 0 1 2 3 does not lie on the same patch.

go to tutorials/incompressible/icoFoam/cavity

and look at blockMeshDict

change the patch definition from

Code:
    wall movingWall 
    (
        (3 7 6 2)
    )
to ...lets say
Code:
    wall movingWall 
    (
        (4 7 6 2)
    )
run blockMesh and you will get the same message, meaning here that point 4 does not belong to the
movingWall patch
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Old   June 12, 2011, 01:02
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Tanay Deshpande
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Yeah, I got the same problem with my meshing.
Still, Niklas, if 0 1 2 3 are key-points connecting two surfaces of the geometry, they'll have to lie on two different patches, right? Like take an edge of a cube for exapmle. Suppose the 2 faces it connects (for which it's the common side) are different patches (maybe inlet and wall), the end-points of that edge will have to lie on two different patches. So, what do we do now?
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Old   June 12, 2011, 01:10
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In fact check this out if anyone's interested,

It's a blockMeshDict file to create a U-shaped reactor with diverging and converging sections in between. I'm getting an error message saying

FOAM FATAL ERROR:
face 0 in patch 0 does not have neighbour cell face: 4(0 2 3 1)

with some more negative cell volumes.
What may be happening? I appreciate all the help :-)


/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: 1.7.1 |
| \\ / A nd | Web: www.OpenFOAM.com |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class dictionary;
object blockMeshDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

convertToMeters 1;

vertices
(
(0 0 0) //0
(0 1 0) //1
(0 0 1) //2
(0 1 1) //3

(1 0 0) //4
(1 1 0) //5
(1 0 1) //6
(1 1 1) //7

(2 0 0) //8
(2 3 0) //9
(2 0 1) //10
(2 3 1) //11

(4 0 2) //12
(4 3 2) //13
(3 0 2) //14
(3 3 2) //15

(2 0 4) //16
(2 3 4) //17
(2 0 3) //18
(2 3 3) //19

(1 0 4) //20
(1 1 4) //21
(1 0 3) //22
(1 1 3) //23

(0 0 4) //24
(0 1 4) //25
(0 0 3) //26
(0 1 3) //27
);

blocks
(
hex (0 1 2 3 4 5 6 7) (10 10 10) simpleGrading (1 1 1)
hex (4 5 6 7 8 9 10 11) (10 10 10) simpleGrading (1 1 1)
hex (8 9 10 11 12 13 14 15) (10 10 10) simpleGrading (1 1 1)
hex (12 13 14 15 16 17 18 19) (10 10 10) simpleGrading (1 1 1)
hex (16 17 18 19 20 21 22 23) (10 10 10) simpleGrading (1 1 1)
hex (20 21 22 23 24 25 26 27) (10 10 10) simpleGrading (1 1 1)
);

edges
(
arc 10 18 (3 0 2)
arc 11 19 (3 3 2)
arc 8 16 (4 0 2)
arc 9 17 (4 3 2)
);

patches
(
patch flowInlet
(
(0 2 3 1)
)
patch flowOutlet
(
(24 26 27 25)
)
wall bottomSurf
(
(0 2 6 4)
(4 6 10 8)
(8 10 14 12)
(12 14 18 16)
(16 18 22 20)
(20 22 26 24)
)
wall innerSurf
(
(2 3 7 6)
(6 7 11 10)
(10 11 15 14)
(14 15 19 18)
(18 19 23 22)
(22 23 27 26)
)
wall topSurf
(
(1 3 7 5)
(5 7 11 9)
(9 11 15 13)
(13 15 19 17)
(17 19 23 21)
(21 23 27 25)
)
wall outerSurf
(
(0 1 5 4)
(4 5 9 8)
(8 9 13 12)
(12 13 17 16)
(16 17 21 20)
(20 21 25 24)
)
);

mergePatchPairs();
//End
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Old   June 12, 2011, 05:52
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Hi Tanay,

there are problems in your block's numbering. To hunt down the problem you can
- comment out the patches definition, afterwards you can have a look at the mesh in Paraview (screenshot 1)
- control the topology with pyFoamDisplayBlockMesh (screenshot 2)
- modify the block's numbering one by one, with patch definition still off, until no errors remain
- include the patch definition again

Corrected blockMeshDict is in attachment.

Martin
Attached Images
File Type: jpg bad_numbering.jpg (44.4 KB, 287 views)
File Type: jpg bad_numbering1.jpg (27.4 KB, 265 views)
Attached Files
File Type: gz blockMeshDict.tar.gz (892 Bytes, 56 views)
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Old   June 12, 2011, 07:12
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Quote:
Originally Posted by Tanay View Post

FOAM FATAL ERROR:
face 0 in patch 0 does not have neighbour cell face: 4(0 2 3 1)

with some more negative cell volumes.
What may be happening? I appreciate all the help :-)
This is another error, that yields the same message.
Your points are not in the correct order. If you 'follow' the trace the points make
with your fingers on your right hand, the thumb should point out from the volume,
if the order is correct
0 2 3 1 - there's no order at all here.
Should probably be: 0 1 2 3. (if not its 3 2 1 0)

EDIT: Just loooked at the screenshot from martinB and realized that your block is defined wrong (not the face)
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Old   June 12, 2011, 12:34
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Thanks a lot Martin, Niklas! So naive of me, I didn't realize that block numbering has a specific pattern, sorry :-) Everything works fine now.
That utility which drew the the wrong mesh was so awesome! How did you draw it? I tried pyFoamDisplayBlockMesh out of interest and nothing happened.
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Old   June 12, 2011, 12:44
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Quote:
How did you draw it?
For the first image remove the definition for patches, so only a single entry for patches is left:
Code:
 patches
 ();
Then call blockMesh and finally paraFoam.

For the second image: call
Code:
pyFoamDisplayBlockMesh constant/polyMesh/blockMeshDict
Of course the pyFoam utilities must be installed.

Martin
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Old   June 13, 2011, 01:40
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Thanks Martin!
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Old   June 13, 2011, 03:59
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I had solve the problem, I mean I still don't get it,

I feel you can't create point and block in the order your want.
So i change my program create the blockMeeshDict as the exemple.
Now it work well
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Old   June 13, 2011, 06:00
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Yes, Greg, that's because there 'is' a specific pattern to numbering points defining a block. Watch the solved example and learn. The 1st 4 points are of a 'cubic' face in order and the next 4 are the opposite face in exactly the same order.
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Old   June 13, 2011, 07:18
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Yes I saw that. now it work well Thank you
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Old   June 16, 2011, 14:05
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Gunawan Aneva
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Hi Nordin

Please help me.. I have same problem
My blockMesh:

convertToMeters 0.01; // todo en cm

vertices
(
(1.09 0 0) //0
(2.09 0 0) //1
(0 2.09 0) //2
(0 1.09 0) //3
(1e-10 0 0.7) //4
(0.2 0 0.7) //5
(2.79 0 0.7) //6
(0 2.79 0.7) //7
(0 0.2 0.7) //8
(0 1e-10 0.7) //9
(1e-10 0 1.469) //10
(0.2 0 1.469) //11
(2.79 0 1.469) //12
(4.65 0 1.469) //13
(0 4.65 1.469) //14
(0 2.79 1.469) //15
(0 0.2 1.469) //16
(0 1e-10 1.469) //17
(1e-10 0 10.669) //18
(0.2 0 10.669) //19
(2.79 0 10.669) //20
(4.65 0 10.669) //21
(0 4.65 10.669) //22
(0 2.79 10.669) //23
(0 0.2 10.669) //24
(0 1e-10 10.669) //25
(1.09 0 0.7) //26
(2.09 0 0.7) //27
(0 2.09 0.7) //28
(0 1.09 0.7) //29
(1.09 0 1.469) //30
(2.09 0 1.469) //31
(0 2.09 1.469) //32
(0 1.09 1.469) //33
(1.09 0 10.69) //34
(2.09 0 10.69) //35
(0 2.09 10.69) //36
(0 1.09 10.69) //37
) ;

blocks
(
hex (0 0 3 3 5 26 29 8) (20 20 20) simpleGrading (1 1 1)
hex (0 1 2 3 26 27 28 29) (20 20 20) simpleGrading (1 1 1)
hex (1 1 2 2 27 6 7 28) (20 20 20) simpleGrading (1 1 1)
hex (4 5 8 9 10 11 16 17) (5 5 20) simpleGrading (1 1 1)
hex (5 26 29 8 11 30 33 16) (20 20 20) simpleGrading (1 1 1)
hex (26 27 28 29 30 31 32 33) (20 20 20) simpleGrading (1 1 1)
hex (27 6 7 28 31 12 15 32) (20 20 20) simpleGrading (1 1 1)
hex (10 11 16 17 18 19 24 25) (5 5 20) simpleGrading (1 1 10)
hex (11 30 33 16 19 34 37 24) (20 20 20) simpleGrading (1 1 10)
hex (30 31 32 33 34 35 36 37) (20 20 20) simpleGrading (1 1 10)
hex (31 12 15 32 35 20 23 36) (20 20 20) simpleGrading (1 1 10)
hex (12 13 14 15 20 21 22 23) (20 20 20) simpleGrading (1 1 10)



);

edges
(
arc 0 3 (1.97282792 1.97282792 0)
arc 1 2 (0.77074639 0.77074639 0)
arc 5 8 (0.14142136 0.14142136 0.7)
arc 6 7 (1.97282792 1.97282792 0.7)
arc 12 15 (1.97282792 1.97282792 1.469)
arc 13 14 (3.288046533 3.288046533 1.469)
arc 21 22 (3.288046533 3.288046533 10.669)
);

patches
(
wall piston
(
(4 9 8 5)
(0 3 8 5)
(0 3 2 1)
(1 2 7 6)
(12 15 14 13)
)

wall cylinderHead
(
(18 25 24 19)
(19 24 37 34)
(34 37 36 35)
(35 36 23 20)
(20 23 22 21)


)

wall liner
(
(13 14 22 21)
(6 7 15 12)
(4 9 17 10)
(10 17 25 18)
)

cyclic cyclic
(
(0 0 26 5)
(0 1 27 26)
(1 1 6 27)
(4 5 11 10)
(5 26 30 11)
(26 27 31 30)
(27 6 12 31)

(10 11 19 18)
(11 30 34 19)
(30 31 35 34)
(31 12 20 35)
(12 13 21 20)

(2 2 28 7)
(2 3 29 28)

(3 3 8 29)
(8 9 17 16)
(29 8 16 33)
(28 29 33 32)
(7 28 32 15)
(16 17 25 24)
(33 16 24 37)
(32 33 37 36)
(15 32 36 23)
(14 15 23 22)

)
);

mergePatchPairs
(
);

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


and the problem is:
face 0 area does not match neighbour 12 by 23.8994% -- possible face ordering problem.
patch:cyclic my area:0.3115 neighbour area:0.245 matching tolerance:0.001
Mesh face:30 vertices:4((1.09 0 0) (1.09 0 0) (1.09 0 0.7) (0.2 0 0.7))
Neighbour face:42 vertices:4((0 2.09 0) (0 2.09 0) (0 2.09 0.7) (0 2.79 0.7))
Rerun with cyclic debug flag set for more information.

From function cyclicPolyPatch::calcTransforms()
in file meshes/polyMesh/polyPatches/constraint/cyclic/cyclicPolyPatch.C at line 150.

FOAM exiting


Please help me..
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Old   June 16, 2011, 15:29
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Hi Gunawan,

some fixes, changes are marked with " // <--- explanation":

Code:
/*--------------------------------*- C++ -*----------------------------------*\
 | ========= | |
 | \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
 | \\ / O peration | Version: 1.7.1 |
 | \\ / A nd | Web: www.OpenFOAM.com |
 | \\/ M anipulation | |
 \*---------------------------------------------------------------------------*/
 FoamFile
 {
 version 2.0;
 format ascii;
 class dictionary;
 object blockMeshDict;
 }
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
convertToMeters 0.01; // todo en cm

 vertices
 (
 (1.09 0 0) //0
 (2.09 0 0) //1
 (0 2.09 0) //2
 (0 1.09 0) //3
 (1e-10 0 0.7) //4
 (0.2 0 0.7) //5
 (2.79 0 0.7) //6
 (0 2.79 0.7) //7
 (0 0.2 0.7) //8
 (0 1e-10 0.7) //9
 (1e-10 0 1.469) //10
 (0.2 0 1.469) //11
 (2.79 0 1.469) //12
 (4.65 0 1.469) //13
 (0 4.65 1.469) //14
 (0 2.79 1.469) //15
 (0 0.2 1.469) //16
 (0 1e-10 1.469) //17
 (1e-10 0 10.669) //18
 (0.2 0 10.669) //19
 (2.79 0 10.669) //20
 (4.65 0 10.669) //21
 (0 4.65 10.669) //22
 (0 2.79 10.669) //23
 (0 0.2 10.669) //24
 (0 1e-10 10.669) //25
 (1.09 0 0.7) //26
 (2.09 0 0.7) //27
 (0 2.09 0.7) //28
 (0 1.09 0.7) //29
 (1.09 0 1.469) //30
 (2.09 0 1.469) //31
 (0 2.09 1.469) //32
 (0 1.09 1.469) //33
 (1.09 0 10.69) //34
 (2.09 0 10.69) //35
 (0 2.09 10.69) //36
 (0 1.09 10.69) //37
 ) ;

 blocks
 (
 hex (0 0 3 3 5 26 29 8) b0 (20 20 20) simpleGrading (1 1 1)
 hex (0 1 2 3 26 27 28 29) b1 (20 20 20) simpleGrading (1 1 1)
 hex (1 1 2 2 27 6 7 28) b2 (20 20 20) simpleGrading (1 1 1)
 hex (4 5 8 9 10 11 16 17) b3 (5 20 20) simpleGrading (1 1 1) // <--- changed n elems from (5 5 20) to (5 20 20)
 hex (5 26 29 8 11 30 33 16) b4 (20 20 20) simpleGrading (1 1 1)
 hex (26 27 28 29 30 31 32 33) b5 (20 20 20) simpleGrading (1 1 1)
 hex (27 6 7 28 31 12 15 32) b6 (20 20 20) simpleGrading (1 1 1)
 hex (10 11 16 17 18 19 24 25) b7 (5 20 20) simpleGrading (1 1 10) // <--- changed n elems from (5 5 20) to (5 20 20)
 hex (11 30 33 16 19 34 37 24) b8 (20 20 20) simpleGrading (1 1 10)
 hex (30 31 32 33 34 35 36 37) b9 (20 20 20) simpleGrading (1 1 10)
 hex (31 12 15 32 35 20 23 36) b10 (20 20 20) simpleGrading (1 1 10)
 hex (12 13 14 15 20 21 22 23) b11 (20 20 20) simpleGrading (1 1 10)



 );

 edges
 (
 arc 1 2 (1.97282792 1.97282792 0) // <--- error here: not 0 3, but 1 2
 arc 0 3 (0.77074639 0.77074639 0) // <--- and here: not 1 2, but 0 3
 arc 5 8 (0.14142136 0.14142136 0.7)
 arc 6 7 (1.97282792 1.97282792 0.7)
 arc 12 15 (1.97282792 1.97282792 1.469)
 arc 13 14 (3.288046533 3.288046533 1.469)
 arc 21 22 (3.288046533 3.288046533 10.669)
 );

 patches
 (
 wall piston
 (
 (4 9 8 5)
 (0 3 8 5)
 (0 3 2 1)
 (1 2 7 6)
 (12 15 14 13)
 )

 wall cylinderHead
 (
 (18 25 24 19)
 (19 24 37 34)
 (34 37 36 35)
 (35 36 23 20)
 (20 23 22 21)


 )

 wall liner
 (
 (13 14 22 21)
 (6 7 15 12)
 (4 9 17 10)
 (10 17 25 18)
 )

 patch cyclic
 (
 (0 0 26 5)
 (0 1 27 26)
 (1 1 6 27)
 (4 5 11 10)
 (5 26 30 11)
 (26 27 31 30)
 (27 6 12 31)

 (10 11 19 18)
 (11 30 34 19)
 (30 31 35 34)
 (31 12 20 35)
 (12 13 21 20)

 (2 2 28 7)
 (2 3 29 28)

 (3 3 8 29)
 (8 9 17 16)
 (29 8 16 33)
 (28 29 33 32)
 (7 28 32 15)
 (16 17 25 24)
 (33 16 24 37)
 (32 33 37 36)
 (15 32 36 23)
 (14 15 23 22)

 )
 );

 mergePatchPairs
 (
 );

 // ******************** //
checkMesh is still complaining, you may have to tune your topology a little bit...

Good luck

Martin
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Old   June 24, 2011, 14:06
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Gunawan Aneva
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Hi Martin.. Thank you very much.. Thanks for your help..
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Old   July 19, 2011, 09:42
Default How dieselEngineFoam work?
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Gunawan Aneva
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hai all
im still newbie in openfoam
I really need your helps

I was trying to make a simulation with dieselenginefoam for my final project
but I'm still not master it yet

I have some questions here:
1. Is injected fuel considered as liquid or gas?
2. does dieselenginefoam care about ignition delay or not?
3. Is there any spesific tutorial about dieselEngineFOAM?

thanks for your answer..

sorry for my bad english
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Old   November 29, 2013, 23:19
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Prateek
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Nevermind! I found my mistake...

Last edited by pratiek; November 30, 2013 at 20:26. Reason: found my mistake!
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Old   November 30, 2013, 20:24
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Well, found my mistake myself...I had missed out the block 4! yaay!
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Old   February 12, 2014, 19:46
Default I have the same problem with creating axis
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I am trying to create an axisymmetric domain with wedge condition and the angle is 2 degrees. I tried to correct the ordering of vertices but I end up in getting an error as "face 0 in patch 1 does not have neighbour cell face: 4(1 1 4 2)"
I want to create an axis of symmetry on x axis. Please help me.

/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: 2.2.2 |
| \\ / A nd | Web: www.OpenFOAM.org |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class dictionary;
object blockMeshDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

convertToMeters 1;

vertices
(
(0 0 0) //0
(0.018 0 0) //1
(0.018 0.034744 0.001256) //2
(0 0.034744 0.001256) //3
(0.018 0.034744 -0.001256) //4
(0 0.034744 -0.001256) //5
);

blocks
(
hex (0 1 1 0 2 3 4 5) (80 240 240) simpleGrading (20 1 1)
);

edges
(
);

boundary
(
axis
{
type empty;
faces
(
(0 1 1 0)
);
}

atmosphere
{
type wall;
faces
(
(1 1 4 2)
);
}
bottom
{
type wall;
faces
(
(0 3 5 0)
);
}
walls
{
type wall;
faces
(
(4 5 3 2)
);
}
front
{
type wedge;
faces
(
(1 2 3 0)
);
}
back
{
type wedge;
faces
(
(4 1 0 5)
);
}

);

mergePatchPairs
(
);

// ************************************************** *********************** //
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Old   February 13, 2014, 07:31
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shinji nakagawa
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hi,

The local coordinate system is defined by the order in which the vertices are presented in the block definition. Please refer to UserGuide 5.3.
Using the following blocks will create mesh without error.

blocks
(
hex (5 4 2 3 0 1 1 0) (80 1 240) simpleGrading (1 1 1)
);
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Trimmed cell and embedded refinement mesh conversion issues michele OpenFOAM Other Meshers: ICEM, Star, Ansys, Pointwise, GridPro, Ansa, ... 2 July 15, 2005 04:15


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