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-   -   [blockMesh] meshing a cylinder (https://www.cfd-online.com/Forums/openfoam-meshing/86968-meshing-cylinder.html)

Nico A. April 7, 2011 11:17
meshing a cylinder
 
Hello at all,

my problem is the following: i want to simulate the flow around a cylinder. therefore i used the blockMeshDict of an openfoam tutorial ( /basic/potentialFoam/cylinder). i tried to create a full cylinder out of the existing mesh. this is what i tried for my blockMeshDict:

Code:
vertices       
(
    (0.5 0 -0.5)                //0
    (1 0 -0.5)                        //1
    (2 0 -0.5)                        //2
    (2 0.707107 -0.5)                //3
    (0.707107 0.707107 -0.5)        //4
    (0.353553 0.353553 -0.5)        //5
    (2 2 -0.5)                        //6
    (0.707107 2 -0.5)                //7
    (0 2 -0.5)                        //8
    (0 1 -0.5)                        //9
    (0 0.5 -0.5)                //10
    (-0.5 0 -0.5)                //11
    (-1 0 -0.5)                        //12
    (-2 0 -0.5)                        //13
    (-2 0.707107 -0.5)                //14
    (-0.707107 0.707107 -0.5)        //15
    (-0.353553 0.353553 -0.5)        //16
    (-2 2 -0.5)                        //17
    (-0.707107 2 -0.5)                //18
    (0.5 0 0.5)                        //19
    (1 0 0.5)                        //20
    (2 0 0.5)                        //21
    (2 0.707107 0.5)                //22
    (0.707107 0.707107 0.5)        //23
    (0.353553 0.353553 0.5)        //24
    (2 2 0.5)                        //25
    (0.707107 2 0.5)                //26
    (0 2 0.5)                        //27
    (0 1 0.5)                        //28
    (0 0.5 0.5)                        //29
    (-0.5 0 0.5)                //30
    (-1 0 0.5)                        //31
    (-2 0 0.5)                        //32
    (-2 0.707107 0.5)                //33
    (-0.707107 0.707107 0.5)        //34
    (-0.353553 0.353553 0.5)        //35
    (-2 2 0.5)                        //36
    (-0.707107 2 0.5)                //37
    (2 -0.707107 -0.5)                //38
    (0.707107 -0.707107 -0.5)        //39
    (0.353553 -0.353553 -0.5)        //40
    (2 -2 -0.5)                        //41
    (0.707107 -2 -0.5)                //42
    (0 -2 -0.5)                        //43
    (0 -1 -0.5)                        //44
    (0 -0.5 -0.5)                //45       
    (-2 -0.707107 -0.5)                //46
    (-0.707107 -0.707107 -0.5)        //47
    (-0.353553 -0.353553 -0.5)        //48
    (-2 -2 -0.5)                //49
    (-0.707107 -2 -0.5)                //50       
    (2 -0.707107 0.5)                //51
    (0.707107 -0.707107 0.5)        //52
    (0.353553 -0.353553 0.5)        //53       
    (2 -2 0.5)                        //54
    (0.707107 -2 0.5)                //55
    (0 -2 0.5)                        //56
    (0 -1 0.5)                        //57
    (0 -0.5 0.5)                //58
    (-2 -0.707107 0.5)                //59
    (-0.707107 -0.707107 0.5)        //60
    (-0.353553 -0.353553 0.5)        //61
    (-2 -2 0.5)                        //62
    (-0.707107 -2 0.5)          //63
);

blocks         
(
    hex (5 4 9 10 24 23 28 29) (10 10 1) simpleGrading (1 1 1)
    hex (0 1 4 5 19 20 23 24) (10 10 1) simpleGrading (1 1 1)
    hex (1 2 3 4 20 21 22 23) (20 10 1) simpleGrading (1 1 1)
    hex (4 3 6 7 23 22 25 26) (20 20 1) simpleGrading (1 1 1)
    hex (9 4 7 8 28 23 26 27) (10 20 1) simpleGrading (1 1 1)
    hex (15 16 10 9 34 35 29 28) (10 10 1) simpleGrading (1 1 1)
    hex (12 11 16 15 31 30 35 34) (10 10 1) simpleGrading (1 1 1)
    hex (13 12 15 14 32 31 34 33) (20 10 1) simpleGrading (1 1 1)
    hex (14 15 18 17 33 34 37 36) (20 20 1) simpleGrading (1 1 1)
    hex (15 9 8 18 34 28 27 37) (10 20 1) simpleGrading (1 1 1)
    hex (40 39 44 45 53 52 57 58) (10 10 1) simpleGrading (1 1 1)
    hex (0 1 39 40 19 20 52 53) (10 10 1) simpleGrading (1 1 1)
    hex (1 2 38 39 20 21 51 52) (20 10 1) simpleGrading (1 1 1)
    hex (39 38 41 42 52 51 54 55) (20 20 1) simpleGrading (1 1 1)
    hex (44 39 42 43 57 52 55 56) (10 20 1) simpleGrading (1 1 1)
    hex (47 48 45 44 60 61 58 57) (10 10 1) simpleGrading (1 1 1)
    hex (12 11 48 47 31 30 61 60) (10 10 1) simpleGrading (1 1 1)
    hex (13 12 47 46 32 31 60 59) (20 10 1) simpleGrading (1 1 1)
    hex (46 47 50 49 59 60 63 62) (20 20 1) simpleGrading (1 1 1)
    hex (47 44 43 50 60 57 56 63) (10 20 1) simpleGrading (1 1 1)
);

edges         
(
    arc 0 5 (0.469846 0.17101 -0.5)
    arc 5 10 (0.17101 0.469846 -0.5)
    arc 1 4 (0.939693 0.34202 -0.5)
    arc 4 9 (0.34202 0.939693 -0.5)
    arc 19 24 (0.469846 0.17101 0.5)
    arc 24 29 (0.17101 0.469846 0.5)
    arc 20 23 (0.939693 0.34202 0.5)
    arc 23 28 (0.34202 0.939693 0.5)
    arc 11 16 (-0.469846 0.17101 -0.5)
    arc 16 10 (-0.17101 0.469846 -0.5)
    arc 12 15 (-0.939693 0.34202 -0.5)
    arc 15 9 (-0.34202 0.939693 -0.5)
    arc 30 35 (-0.469846 0.17101 0.5)
    arc 35 29 (-0.17101 0.469846 0.5)
    arc 31 34 (-0.939693 0.34202 0.5)
    arc 34 28 (-0.34202 0.939693 0.5)
    arc 0 40 (0.469846 -0.17101 -0.5)
    arc 40 45 (0.17101 -0.469846 -0.5)
    arc 1 39 (0.939693 -0.34202 -0.5)
    arc 39 44 (0.34202 -0.939693 -0.5)
    arc 19 53 (0.469846 -0.17101 0.5)
    arc 53 58 (0.17101 -0.469846 0.5)
    arc 20 52 (0.939693 -0.34202 0.5)
    arc 52 57 (0.34202 -0.939693 0.5)
    arc 11 48 (-0.469846 -0.17101 -0.5)
    arc 48 45 (-0.17101 -0.469846 -0.5)
    arc 12 47 (-0.939693 -0.34202 -0.5)
    arc 47 44 (-0.34202 -0.939693 -0.5)
    arc 30 61 (-0.469846 -0.17101 0.5)
    arc 61 58 (-0.17101 -0.469846 0.5)
    arc 31 60 (-0.939693 -0.34202 0.5)
    arc 60 57 (-0.34202 -0.939693 0.5)
);

patches       
(
    symmetryPlane down
    (
        (42 43 56 55)
        (41 42 55 54)
        (43 50 63 56)
        (50 49 62 63)
    )
    patch right
    (
        (2 3 22 21)
        (3 6 25 22)
        (2 38 51 21)
        (38 41 54 51)
    )
    symmetryPlane up
    (
        (7 8 27 26)
        (6 7 26 25)
        (8 18 37 27)
        (18 17 36 37)
    )
    patch left
    (
        (14 13 32 33)
        (17 14 33 36)
        (46 13 32 59)
        (49 46 59 62)
    )
    symmetryPlane cylinder
    (
        (10 5 24 29)
        (5 0 19 24)
        (16 10 29 35)
        (11 16 35 30)
        (45 40 53 58)
        (40 0 19 53)
        (48 45 58 61)
        (11 48 61 30)
    )
);

mergePatchPairs
(
);

// ************************************************************************* //
when creating the block mesh topology, i get multiple warnings like:
Code:
zero or negative pyramid volume: -0.0441942 for face 3
and
Code:
From function blockMesh::createTopology(IOdictionary&)
    in file createTopology.C at line 397
    negative volume block : 10, probably defined inside-out
I dont know what it means and how to solve that problem.

with kind regards!

MartinB April 7, 2011 13:39
Hi Nico,

there are some problems with the numbers order in block 12 up to 19.

Here is the correction:
Code:
/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: 1.5 |
| \\ / A nd | Web: http://www.OpenFOAM.org |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class dictionary;
object blockMeshDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

convertToMeters 1;

vertices       
(
    (0.5 0 -0.5)                //0
    (1 0 -0.5)                        //1
    (2 0 -0.5)                        //2
    (2 0.707107 -0.5)                //3
    (0.707107 0.707107 -0.5)        //4
    (0.353553 0.353553 -0.5)        //5
    (2 2 -0.5)                        //6
    (0.707107 2 -0.5)                //7
    (0 2 -0.5)                        //8
    (0 1 -0.5)                        //9
    (0 0.5 -0.5)                //10
    (-0.5 0 -0.5)                //11
    (-1 0 -0.5)                        //12
    (-2 0 -0.5)                        //13
    (-2 0.707107 -0.5)                //14
    (-0.707107 0.707107 -0.5)        //15
    (-0.353553 0.353553 -0.5)        //16
    (-2 2 -0.5)                        //17
    (-0.707107 2 -0.5)                //18
    (0.5 0 0.5)                        //19
    (1 0 0.5)                        //20
    (2 0 0.5)                        //21
    (2 0.707107 0.5)                //22
    (0.707107 0.707107 0.5)        //23
    (0.353553 0.353553 0.5)        //24
    (2 2 0.5)                        //25
    (0.707107 2 0.5)                //26
    (0 2 0.5)                        //27
    (0 1 0.5)                        //28
    (0 0.5 0.5)                        //29
    (-0.5 0 0.5)                //30
    (-1 0 0.5)                        //31
    (-2 0 0.5)                        //32
    (-2 0.707107 0.5)                //33
    (-0.707107 0.707107 0.5)        //34
    (-0.353553 0.353553 0.5)        //35
    (-2 2 0.5)                        //36
    (-0.707107 2 0.5)                //37
    (2 -0.707107 -0.5)                //38
    (0.707107 -0.707107 -0.5)        //39
    (0.353553 -0.353553 -0.5)        //40
    (2 -2 -0.5)                        //41
    (0.707107 -2 -0.5)                //42
    (0 -2 -0.5)                        //43
    (0 -1 -0.5)                        //44
    (0 -0.5 -0.5)                //45       
    (-2 -0.707107 -0.5)                //46
    (-0.707107 -0.707107 -0.5)        //47
    (-0.353553 -0.353553 -0.5)        //48
    (-2 -2 -0.5)                //49
    (-0.707107 -2 -0.5)                //50       
    (2 -0.707107 0.5)                //51
    (0.707107 -0.707107 0.5)        //52
    (0.353553 -0.353553 0.5)        //53       
    (2 -2 0.5)                        //54
    (0.707107 -2 0.5)                //55
    (0 -2 0.5)                        //56
    (0 -1 0.5)                        //57
    (0 -0.5 0.5)                //58
    (-2 -0.707107 0.5)                //59
    (-0.707107 -0.707107 0.5)        //60
    (-0.353553 -0.353553 0.5)        //61
    (-2 -2 0.5)                        //62
    (-0.707107 -2 0.5)          //63
);

blocks         
(
    hex (5 4 9 10 24 23 28 29) (10 10 1) simpleGrading (1 1 1) // 0
    hex (0 1 4 5 19 20 23 24) (10 10 1) simpleGrading (1 1 1)
    hex (1 2 3 4 20 21 22 23) (20 10 1) simpleGrading (1 1 1) // 2
    hex (4 3 6 7 23 22 25 26) (20 20 1) simpleGrading (1 1 1)
    hex (9 4 7 8 28 23 26 27) (10 20 1) simpleGrading (1 1 1)
    hex (15 16 10 9 34 35 29 28) (10 10 1) simpleGrading (1 1 1)
    hex (12 11 16 15 31 30 35 34) (10 10 1) simpleGrading (1 1 1)
    hex (13 12 15 14 32 31 34 33) (20 10 1) simpleGrading (1 1 1)
    hex (14 15 18 17 33 34 37 36) (20 20 1) simpleGrading (1 1 1)
    hex (15 9 8 18 34 28 27 37) (10 20 1) simpleGrading (1 1 1)
    hex (44 39 40 45 57 52 53 58) (10 10 1) simpleGrading (1 1 1)
    hex (39 1 0 40 52 20 19 53) (10 10 1) simpleGrading (1 1 1)
    hex (38 2 1 39 51 21 20 52) (10 20 1) simpleGrading (1 1 1) // 12
    hex (42 41 38 39 55 54 51 52) (20 20 1) simpleGrading (1 1 1)
    hex (43 42 39 44 56 55 52 57) (10 20 1) simpleGrading (1 1 1)
    hex (47 44 45 48 60 57 58 61) (10 10 1) simpleGrading (1 1 1)
    hex (12 47 48 11 31 60 61 30) (10 10 1) simpleGrading (1 1 1)
    hex (13 46 47 12 32 59 60 31) (10 20 1) simpleGrading (1 1 1) // 17
    hex (49 50 47 46 62 63 60 59) (20 20 1) simpleGrading (1 1 1)
    hex (50 43 44 47 63 56 57 60) (10 20 1) simpleGrading (1 1 1)
);

edges         
(
    arc 0 5 (0.469846 0.17101 -0.5)
    arc 5 10 (0.17101 0.469846 -0.5)
    arc 1 4 (0.939693 0.34202 -0.5)
    arc 4 9 (0.34202 0.939693 -0.5)
    arc 19 24 (0.469846 0.17101 0.5)
    arc 24 29 (0.17101 0.469846 0.5)
    arc 20 23 (0.939693 0.34202 0.5)
    arc 23 28 (0.34202 0.939693 0.5)
    arc 11 16 (-0.469846 0.17101 -0.5)
    arc 16 10 (-0.17101 0.469846 -0.5)
    arc 12 15 (-0.939693 0.34202 -0.5)
    arc 15 9 (-0.34202 0.939693 -0.5)
    arc 30 35 (-0.469846 0.17101 0.5)
    arc 35 29 (-0.17101 0.469846 0.5)
    arc 31 34 (-0.939693 0.34202 0.5)
    arc 34 28 (-0.34202 0.939693 0.5)
    arc 0 40 (0.469846 -0.17101 -0.5)
    arc 40 45 (0.17101 -0.469846 -0.5)
    arc 1 39 (0.939693 -0.34202 -0.5)
    arc 39 44 (0.34202 -0.939693 -0.5)
    arc 19 53 (0.469846 -0.17101 0.5)
    arc 53 58 (0.17101 -0.469846 0.5)
    arc 20 52 (0.939693 -0.34202 0.5)
    arc 52 57 (0.34202 -0.939693 0.5)
    arc 11 48 (-0.469846 -0.17101 -0.5)
    arc 48 45 (-0.17101 -0.469846 -0.5)
    arc 12 47 (-0.939693 -0.34202 -0.5)
    arc 47 44 (-0.34202 -0.939693 -0.5)
    arc 30 61 (-0.469846 -0.17101 0.5)
    arc 61 58 (-0.17101 -0.469846 0.5)
    arc 31 60 (-0.939693 -0.34202 0.5)
    arc 60 57 (-0.34202 -0.939693 0.5)
);

patches       
(
    symmetryPlane down
    (
        (42 43 56 55)
        (41 42 55 54)
        (43 50 63 56)
        (50 49 62 63)
    )
    patch right
    (
        (2 3 22 21)
        (3 6 25 22)
        (2 38 51 21)
        (38 41 54 51)
    )
    symmetryPlane up
    (
        (7 8 27 26)
        (6 7 26 25)
        (8 18 37 27)
        (18 17 36 37)
    )
    patch left
    (
        (14 13 32 33)
        (17 14 33 36)
        (46 13 32 59)
        (49 46 59 62)
    )
    symmetryPlane cylinder
    (
        (10 5 24 29)
        (5 0 19 24)
        (16 10 29 35)
        (11 16 35 30)
        (45 40 53 58)
        (40 0 19 53)
        (48 45 58 61)
        (11 48 61 30)
    )
);

mergePatchPairs
(
);

// ************************************************************************* //
Have fun

Martin

Nico A. April 8, 2011 04:26
Hi Martin,

thanks for your quick reply. Everything works now ( of course :-) )
I am just getting used to OpenFoam.

Greets Nico

Cássio Marques June 17, 2017 22:19
Cilindro - barra redonda - blockMesh
 
Olá, estou tentando fazer uma barra redonda de 20 mm de diâmetro por 900 mm de comprimento no blockMesh. Até então gerou a geometria mas a malha está com problemas. Segue código abaixo.

/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: 3.0.x |
| \\ / A nd | Web: www.OpenFOAM.org |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class dictionary;
object blockMeshDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

convertToMeters 0.001;

vertices // Origem no centro
(
(0 0 0) //0
(0 0 2.5) //1
(0 0 5) //2
(0 5 0) //3
(0 2.5 0) //4
(900 0 0) //5
(900 0 2.5) //6
(900 0 5) //7
(900 5 0) //8
(900 2.5 0) //9
(0 0 -2.5) //10
(0 0 -5) //11
(900 0 -2.5) //12
(900 0 -5) //13
(0 -2.5 0) //14
(0 -5 0) //15
(900 -2.5 0) //16
(900 -5 0) //17
);

blocks
(

hex (0 1 4 0 5 6 9 5) (20 20 1) simpleGrading (1 1 1)
hex (1 2 3 4 6 7 8 9) (20 20 1) simpleGrading (1 1 1)
hex (0 4 10 0 5 9 12 5) (20 20 1) simpleGrading (1 1 1)
hex (10 4 3 11 12 9 8 13) (20 20 1) simpleGrading (1 1 1)
hex (0 10 14 0 5 12 16 5) (20 20 1) simpleGrading (1 1 1)
hex (10 11 15 14 12 13 17 16) (20 20 1) simpleGrading (1 1 1)
hex (0 14 1 0 5 16 6 5) (20 20 1) simpleGrading (1 1 1)
hex (14 15 2 1 16 17 7 6) (20 20 1) simpleGrading ( 1 1 1)
);

edges
(
arc 1 4 (0 1.7677 1.7677)
arc 2 3 (0 3.5355 3.5355)
arc 6 9 (900 1.7677 1.7677)
arc 7 8 (900 3.5355 3.5355)
arc 10 4 (0 1.7677 -1.7677)
arc 11 3 (0 3.5355 -3.5355)
arc 12 9 (900 1.7677 -1.7677)
arc 13 8 (900 3.5355 -3.5355)
arc 10 14 (0 -1.7677 -1.7677)
arc 11 15 (0 -3.5355 -3.5355)
arc 12 16 (900 -1.7677 -1.7677)
arc 13 17 (900 -3.5355 -3.5355)
arc 1 14 (0 -1.7677 1.7677)
arc 2 15 (0 -3.5355 3.5355)
arc 6 16 (900 -1.7677 1.7677)
arc 7 17 (900 -3.5355 3.5355)
);

boundary // Fronteira
(

left
{
type patch;
faces
(
(0 1 4 0) //bloco 0
(1 2 3 4) //bloco 1
(0 4 10 0) //bloco 2
(4 3 11 10) //bloco 3
(0 10 14 0) //bloco 4
(10 11 15 14) //bloco 5
(0 14 1 0) //bloco 6
(14 15 2 1) //bloco 7
);
}

right
{
type patch;
faces
(
(5 9 6 5) //bloco 0
(7 6 9 8) //bloco 1
(5 12 9 5) //bloco 2
(12 13 8 9) //bloco 3
(5 16 12 5) //bloco 4
(16 17 13 12) //bloco 5
(5 6 16 5) //bloco 6
(6 7 17 16) //bloco 7
);
}

frontandback
{
type empty;
faces
(
(2 7 8 3)
(11 3 8 13)
(15 11 13 17)
(2 15 17 7)
);
}

);

mergePatchPairs
(
);
mergePatchPairs
(
);

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








Quote:
Originally Posted by MartinB (Post 302697)
Hi Nico,

there are some problems with the numbers order in block 12 up to 19.

Here is the correction:
Code:
/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: 1.5 |
| \\ / A nd | Web: http://www.OpenFOAM.org |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class dictionary;
object blockMeshDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

convertToMeters 1;

vertices       
(
    (0.5 0 -0.5)                //0
    (1 0 -0.5)                        //1
    (2 0 -0.5)                        //2
    (2 0.707107 -0.5)                //3
    (0.707107 0.707107 -0.5)        //4
    (0.353553 0.353553 -0.5)        //5
    (2 2 -0.5)                        //6
    (0.707107 2 -0.5)                //7
    (0 2 -0.5)                        //8
    (0 1 -0.5)                        //9
    (0 0.5 -0.5)                //10
    (-0.5 0 -0.5)                //11
    (-1 0 -0.5)                        //12
    (-2 0 -0.5)                        //13
    (-2 0.707107 -0.5)                //14
    (-0.707107 0.707107 -0.5)        //15
    (-0.353553 0.353553 -0.5)        //16
    (-2 2 -0.5)                        //17
    (-0.707107 2 -0.5)                //18
    (0.5 0 0.5)                        //19
    (1 0 0.5)                        //20
    (2 0 0.5)                        //21
    (2 0.707107 0.5)                //22
    (0.707107 0.707107 0.5)        //23
    (0.353553 0.353553 0.5)        //24
    (2 2 0.5)                        //25
    (0.707107 2 0.5)                //26
    (0 2 0.5)                        //27
    (0 1 0.5)                        //28
    (0 0.5 0.5)                        //29
    (-0.5 0 0.5)                //30
    (-1 0 0.5)                        //31
    (-2 0 0.5)                        //32
    (-2 0.707107 0.5)                //33
    (-0.707107 0.707107 0.5)        //34
    (-0.353553 0.353553 0.5)        //35
    (-2 2 0.5)                        //36
    (-0.707107 2 0.5)                //37
    (2 -0.707107 -0.5)                //38
    (0.707107 -0.707107 -0.5)        //39
    (0.353553 -0.353553 -0.5)        //40
    (2 -2 -0.5)                        //41
    (0.707107 -2 -0.5)                //42
    (0 -2 -0.5)                        //43
    (0 -1 -0.5)                        //44
    (0 -0.5 -0.5)                //45       
    (-2 -0.707107 -0.5)                //46
    (-0.707107 -0.707107 -0.5)        //47
    (-0.353553 -0.353553 -0.5)        //48
    (-2 -2 -0.5)                //49
    (-0.707107 -2 -0.5)                //50       
    (2 -0.707107 0.5)                //51
    (0.707107 -0.707107 0.5)        //52
    (0.353553 -0.353553 0.5)        //53       
    (2 -2 0.5)                        //54
    (0.707107 -2 0.5)                //55
    (0 -2 0.5)                        //56
    (0 -1 0.5)                        //57
    (0 -0.5 0.5)                //58
    (-2 -0.707107 0.5)                //59
    (-0.707107 -0.707107 0.5)        //60
    (-0.353553 -0.353553 0.5)        //61
    (-2 -2 0.5)                        //62
    (-0.707107 -2 0.5)          //63
);

blocks         
(
    hex (5 4 9 10 24 23 28 29) (10 10 1) simpleGrading (1 1 1) // 0
    hex (0 1 4 5 19 20 23 24) (10 10 1) simpleGrading (1 1 1)
    hex (1 2 3 4 20 21 22 23) (20 10 1) simpleGrading (1 1 1) // 2
    hex (4 3 6 7 23 22 25 26) (20 20 1) simpleGrading (1 1 1)
    hex (9 4 7 8 28 23 26 27) (10 20 1) simpleGrading (1 1 1)
    hex (15 16 10 9 34 35 29 28) (10 10 1) simpleGrading (1 1 1)
    hex (12 11 16 15 31 30 35 34) (10 10 1) simpleGrading (1 1 1)
    hex (13 12 15 14 32 31 34 33) (20 10 1) simpleGrading (1 1 1)
    hex (14 15 18 17 33 34 37 36) (20 20 1) simpleGrading (1 1 1)
    hex (15 9 8 18 34 28 27 37) (10 20 1) simpleGrading (1 1 1)
    hex (44 39 40 45 57 52 53 58) (10 10 1) simpleGrading (1 1 1)
    hex (39 1 0 40 52 20 19 53) (10 10 1) simpleGrading (1 1 1)
    hex (38 2 1 39 51 21 20 52) (10 20 1) simpleGrading (1 1 1) // 12
    hex (42 41 38 39 55 54 51 52) (20 20 1) simpleGrading (1 1 1)
    hex (43 42 39 44 56 55 52 57) (10 20 1) simpleGrading (1 1 1)
    hex (47 44 45 48 60 57 58 61) (10 10 1) simpleGrading (1 1 1)
    hex (12 47 48 11 31 60 61 30) (10 10 1) simpleGrading (1 1 1)
    hex (13 46 47 12 32 59 60 31) (10 20 1) simpleGrading (1 1 1) // 17
    hex (49 50 47 46 62 63 60 59) (20 20 1) simpleGrading (1 1 1)
    hex (50 43 44 47 63 56 57 60) (10 20 1) simpleGrading (1 1 1)
);

edges         
(
    arc 0 5 (0.469846 0.17101 -0.5)
    arc 5 10 (0.17101 0.469846 -0.5)
    arc 1 4 (0.939693 0.34202 -0.5)
    arc 4 9 (0.34202 0.939693 -0.5)
    arc 19 24 (0.469846 0.17101 0.5)
    arc 24 29 (0.17101 0.469846 0.5)
    arc 20 23 (0.939693 0.34202 0.5)
    arc 23 28 (0.34202 0.939693 0.5)
    arc 11 16 (-0.469846 0.17101 -0.5)
    arc 16 10 (-0.17101 0.469846 -0.5)
    arc 12 15 (-0.939693 0.34202 -0.5)
    arc 15 9 (-0.34202 0.939693 -0.5)
    arc 30 35 (-0.469846 0.17101 0.5)
    arc 35 29 (-0.17101 0.469846 0.5)
    arc 31 34 (-0.939693 0.34202 0.5)
    arc 34 28 (-0.34202 0.939693 0.5)
    arc 0 40 (0.469846 -0.17101 -0.5)
    arc 40 45 (0.17101 -0.469846 -0.5)
    arc 1 39 (0.939693 -0.34202 -0.5)
    arc 39 44 (0.34202 -0.939693 -0.5)
    arc 19 53 (0.469846 -0.17101 0.5)
    arc 53 58 (0.17101 -0.469846 0.5)
    arc 20 52 (0.939693 -0.34202 0.5)
    arc 52 57 (0.34202 -0.939693 0.5)
    arc 11 48 (-0.469846 -0.17101 -0.5)
    arc 48 45 (-0.17101 -0.469846 -0.5)
    arc 12 47 (-0.939693 -0.34202 -0.5)
    arc 47 44 (-0.34202 -0.939693 -0.5)
    arc 30 61 (-0.469846 -0.17101 0.5)
    arc 61 58 (-0.17101 -0.469846 0.5)
    arc 31 60 (-0.939693 -0.34202 0.5)
    arc 60 57 (-0.34202 -0.939693 0.5)
);

patches       
(
    symmetryPlane down
    (
        (42 43 56 55)
        (41 42 55 54)
        (43 50 63 56)
        (50 49 62 63)
    )
    patch right
    (
        (2 3 22 21)
        (3 6 25 22)
        (2 38 51 21)
        (38 41 54 51)
    )
    symmetryPlane up
    (
        (7 8 27 26)
        (6 7 26 25)
        (8 18 37 27)
        (18 17 36 37)
    )
    patch left
    (
        (14 13 32 33)
        (17 14 33 36)
        (46 13 32 59)
        (49 46 59 62)
    )
    symmetryPlane cylinder
    (
        (10 5 24 29)
        (5 0 19 24)
        (16 10 29 35)
        (11 16 35 30)
        (45 40 53 58)
        (40 0 19 53)
        (48 45 58 61)
        (11 48 61 30)
    )
);

mergePatchPairs
(
);

// ************************************************************************* //
Have fun

Martin

guin June 19, 2017 06:10
Ola Cássio,
Podes atopar reposta á túa cuestión no seguinte enlace:
https://www.cfd-online.com/Forums/op...tml#post653898
Publiqueino nun thread aparte pra que todo o mundo o poida comprender.
Un saúdo

Cássio Marques June 19, 2017 08:51
Olá, muito Obrigado!

Descompactei o arquivo no diretório system e rodei o blockMesh e beleza, funcionou bem o 1/4 do cilindro.

Só quando estou fazendo a sequência para espelhar está dando erro.
Estou usando a sequência que está no arquivo blockMeshDict.



Quote:
Originally Posted by guin (Post 653904)
Ola Cássio,
Podes atopar reposta á túa cuestión no seguinte enlace:
https://www.cfd-online.com/Forums/op...tml#post653898
Publiqueino nun thread aparte pra que todo o mundo o poida comprender.
Un saúdo

guin June 19, 2017 14:12
Certamente. Cometín un erro ao copia-los comandos no post este mediodía, mais xa o editei.

Note for other visitors: Cássio mentioned some problems regarding the generation of a cylindical rod (length=900mm and diam.=20mm) with blockMesh. The suggested solution can be found in following link:
https://www.cfd-online.com/Forums/op...blockmesh.html


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