[nsreddysrsit]

hi,
I am creating a blockMesh for pipe, here i am attaching geometry as well , I am getting error.
here is the Mesh file.
/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: 2.3.1 |
| \\ / A nd | Web: www.OpenFOAM.org |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
{
version 2.0;
format ascii;
class dictionary;
object blockMeshDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

convertToMeters 0.01;

vertices
(
(0 0 0) //0
(0.15 0.15 0)
(-0.15 0.15 0)
(-0.15 -0.15 0)
(0.15 -0.15 0)
(0.3 0.3 0)//5
(-0.3 0.3 0)
(-0.3 -0.3 0)
(0.3 -0.3 0)
(0.3535 0.3535 0)//9
(-0.3535 0.3535 0)
(-0.3535 -0.3535 0)
(0.3535 -0.3535 0)
(0.15 0.15 30)//13
(-0.15 0.15 30)
(-0.15 -0.15 30)
(0.15 -0.15 30)
(0.3 0.3 30) //17
(-0.3 0.3 30)
(-0.3 -0.3 30)
(0.3 -0.3 30)
(0.3535 0.3535 0) //21
(-0.3535 0.3535 0)
(-0.3535 -0.3535 0)
(0.3535 -0.3535 0)
(0 0 30) //25

);

blocks
(
hex (1 2 3 4 13 14 15 16) (10 10 150) simpleGrading (1 1 1)
hex (1 5 6 2 13 17 18 14) (10 10 150) simpleGrading (1 1 1)
hex (2 6 7 3 14 18 19 15) (10 10 150) simpleGrading (1 1 1)
hex (3 7 8 4 15 19 20 16) (10 10 150) simpleGrading (1 1 1)
hex (4 8 5 1 16 20 17 13) (10 10 150) simpleGrading (1 1 1)
hex (5 9 10 6 17 21 22 18) (10 10 150) simpleGrading (1 1 1)
hex (6 10 11 7 18 22 23 19) (10 10 150) simpleGrading (1 1 1)
hex (7 11 12 8 19 23 24 20) (10 10 150) simpleGrading (1 1 1)
hex (12 9 5 8 24 21 17 20) (10 10 150) simpleGrading (1 1 1)


);

edges
(
arc 5 6 (0 0.42426 0)
arc 6 7 (-0.42426 0 0)
arc 7 8 (0 -0.42426 0)
arc 8 5 (0.42426 0 0)
arc 9 10 (0 0.5 0)
arc 10 11 (-0.5 0 0)
arc 11 12 ( 0 -0.5 0)
arc 12 9 (0.5 0 0)
arc 17 18 (0 0.42426 30)
arc 18 19 (-0.42426 0 30)
arc 19 20 (0 -0.42426 30)
arc 20 17 (0.42426 0 30)
arc 21 22 (0 0.5 30)
arc 22 23 (-0.5 0 30)
arc 23 24 (0 -0.5 30)
arc 24 21 (0.5 0 30)

);
boundary
(
inlet
{
type inlet;
faces
(
(13 16 15 14)
(13 14 18 17)
(14 15 19 18)
(15 16 20 19)
(16 13 17 20)
(17 18 22 21)
(18 19 23 22)
(19 20 24 23)
(20 17 21 24)

);
}
outlet
{
type outlet;
faces
(
(1 5 6 2)
(2 6 7 3)
(3 7 8 4)
(4 8 5 1)
(1 2 3 4)
(5 9 10 6)
(6 10 11 7)
(7 11 12 8)
(8 12 9 5)


);
}
fixwdWalls
{
type fixedWalls;
faces
(
(21 22 10 9)
(22 23 11 10)
(23 24 12 11)
(24 21 9 12)
);
}
);

mergePatchPairs
(
);

// ************************************************** *********************** //
Regards

[hxaxtma]

You had some mistakes in your blockMeshDict

- Forgotten curles )
and there are no patch types like inlet and outlet or fxdwalls.mist commonly used are patch, wall, emtpy, symmetryPlane, e.g.....

Here is the corrected Dictionary.

/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  2.3.0                                 |
|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       dictionary;
    object      blockMeshDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

convertToMeters 0.1;

vertices
(
    (0 0 0) //0
    (0.15 0.15 0)
    (-0.15 0.15 0)
    (-0.15 -0.15 0)
    (0.15 -0.15 0)
    (0.3 0.3 0)//5
    (-0.3 0.3 0)
    (-0.3 -0.3 0)
    (0.3 -0.3 0)
    (0.3535 0.3535 0)//9
    (-0.3535 0.3535 0)
    (-0.3535 -0.3535 0)
    (0.3535 -0.3535 0)
    (0.15 0.15 30)//13
    (-0.15 0.15 30)
    (-0.15 -0.15 30)
    (0.15 -0.15 30)
    (0.3 0.3 30) //17
    (-0.3 0.3 30)
    (-0.3 -0.3 30)
    (0.3 -0.3 30)
    (0.3535 0.3535 0) //21
    (-0.3535 0.3535 0)
    (-0.3535 -0.3535 0)
    (0.3535 -0.3535 0)
    (0 0 30) //25
);

blocks
(
    hex (1 2 3 4 13 14 15 16) (10 10 150) simpleGrading (1 1 1)
    hex (1 5 6 2 13 17 18 14) (10 10 150) simpleGrading (1 1 1)
    hex (2 6 7 3 14 18 19 15) (10 10 150) simpleGrading (1 1 1)
    hex (3 7 8 4 15 19 20 16) (10 10 150) simpleGrading (1 1 1)
    hex (4 8 5 1 16 20 17 13) (10 10 150) simpleGrading (1 1 1)
    hex (5 9 10 6 17 21 22 18) (10 10 150) simpleGrading (1 1 1)
    hex (6 10 11 7 18 22 23 19) (10 10 150) simpleGrading (1 1 1)
    hex (7 11 12 8 19 23 24 20) (10 10 150) simpleGrading (1 1 1)
    hex (12 9 5 8 24 21 17 20) (10 10 150) simpleGrading (1 1 1)
);

edges
(
    arc 5 6 (0 0.42426 0)
    arc 6 7 (-0.42426 0 0)
    arc 7 8 (0 -0.42426 0)
    arc 8 5 (0.42426 0 0)
    arc 9 10 (0 0.5 0)
    arc 10 11 (-0.5 0 0)
    arc 11 12 ( 0 -0.5 0)
    arc 12 9 (0.5 0 0)
    arc 17 18 (0 0.42426 30)
    arc 18 19 (-0.42426 0 30)
    arc 19 20 (0 -0.42426 30)
    arc 20 17 (0.42426 0 30)
    arc 21 22 (0 0.5 30)
    arc 22 23 (-0.5 0 30)
    arc 23 24 (0 -0.5 30)
    arc 24 21 (0.5 0 30)
);

boundary
(
    inlet
    {
        type patch;
        faces
        (
        (13 16 15 14)
        (13 14 18 17)
        (14 15 19 18)
        (15 16 20 19)
        (16 13 17 20)
        (17 18 22 21)
        (18 19 23 22)
        (19 20 24 23)
        (20 17 21 24)    
        );
    }

    fixedWalls
    {
        type wall;
        faces
        (
        (21 22 10 9)
        (22 23 11 10)
        (23 24 12 11)
        (24 21 9 12)
        );
    }

    outlet
    {
        type patch;
        faces
        (
        (1 5 6 2)
        (2 6 7 3)
        (3 7 8 4)
        (4 8 5 1)
        (1 2 3 4)
        (5 9 10 6)
        (6 10 11 7)
        (7 11 12 8)
        (8 12 9 5)
        );
    
    }
);

mergePatchPairs
(
);
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

[hxaxtma]

And just a hint: I use following tools while creating blockMeshDicts
-pyFoamDisplayBlockMesh.py
-paraFoam -blocks

[nsreddysrsit]

thanks for the reply,
After checkMesh I am getting following error.

Checking geometry...
Overall domain bounding box (-1.43321 -1.43321 0) (1.43321 1.43321 3)
Mesh (non-empty, non-wedge) directions (1 1 1)
Mesh (non-empty) directions (1 1 1)
Boundary openness (-8.33742e-18 -1.47677e-16 -3.01599e-18) OK.
***High aspect ratio cells found, Max aspect ratio: 4896.76, number of cells 2704
<<Writing 2704 cells with high aspect ratio to set highAspectRatioCells
Minimum face area = 7.56604e-07. Maximum face area = 0.247873. Face area magnitudes OK.
Min volume = 2.46125e-08. Max volume = 1.77893e-05. Total volume = 0.2571. Cell volumes OK.
Mesh non-orthogonality Max: 180 average: 52.447
*Number of severely non-orthogonal (> 70 degrees) faces: 147240.
***Number of non-orthogonality errors: 5716.
<<Writing 152956 non-orthogonal faces to set nonOrthoFaces
***Error in face pyramids: 11432 faces are incorrectly oriented.
<<Writing 5716 faces with incorrect orientation to set wrongOrientedFaces
***Max skewness = 9.38368, 36 highly skew faces detected which may impair the quality of the results
<<Writing 36 skew faces to set skewFaces
Coupled point location match (average 0) OK.

Failed 4 mesh checks.

Best Regards

[hxaxtma]

Well you defined your geometry wrong...

this is what I got, looks like a space fighter from star wars.

I am missing time at the moment. Maybe during the week I can fix it.

[hxaxtma]

Quick Google search,

example Code for "good" pipe mesh. Just adapt it to your data:

/*--------------------------------*- 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        
(
//internal square
    (0 -1 -1) //0
    (1 -1 -1) //1
    (1 -1  1) //2
    (0 -1  1) //3
    (0  1 -1) //4
    (1  1 -1) //5
    (1  1  1) //6
    (0  1  1) //7
//Going clockwise with sections
//North section
    (0  2  2) //8
    (0 -2  2) //9
    (1  2  2) //10
    (1 -2  2) //11
//East section
    (0  2 -2) //12
    (1  2 -2) //13
//South section
    (0 -2 -2) //14
    (1 -2 -2) //15
);

edges           
(
//North section
   arc  8  9 (0  0     2.82)
   arc 10 11 (1  0     2.82)
//East section
   arc  8 12 (0  2.82  0)
   arc 10 13 (1  2.82  0)
//South section
   arc 12 14 (0  0 -2.82 )
   arc 13 15 (1  0 -2.82 )
//West section
   arc 14  9 (0  -2.82 0)
   arc 15 11 (1  -2.82 0)
);

blocks
(
//Centre
    hex (4 5 6 7 0 1 2 3) (32 48 48) simpleGrading (1 1 1)
//East section
    hex (8 10 11 9 7 6 2 3) (32 48 92) simpleGrading (1 1 0.25)
//East section
    hex (12 13 10 8 4 5 6 7) (32 48 92) simpleGrading (1 1 0.25)
//South section
    hex (14 15 13 12 0 1 5 4) (32 48 92) simpleGrading (1 1 0.25)
//West section
    hex (9 11 15 14 3 2 1 0) (32 48 92) simpleGrading (1 1 0.25)
);

patches         
(
    wall pipeWall
    (
        (9 11 10 8)
        (8 10 13 12)
        (12 14 15 13)
        (14 9 11 15)
    )
    cyclic cNorth
    (
        (9  3 7  8)
        (11 2 6 10)
    )
    cyclic cEast
    (
        (7  4 12  8)
        (6  5 13 10)
    )
    cyclic cSouth
    (
        (0 14 12 4)
        (1 5 13 15)
    )
    cyclic cWest
    (
        (0 14 9 3)
        (1 15 11 2)
    )
    cyclic cCentre
    (
        (0 4 7 3)
        (1 2 6 5)
    )
);

mergePatchPairs
(
);

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

[nsreddysrsit]

thank you,
i will try