CFD Online Discussion Forums - [blockMesh] pipe bend mesh imperfect

Dear fellow Foamers,

I'm still sort of a newbie in OpenFOAM and I'm trying to mesh a pipe bend in blockMesh. I've got no errors when I run blockMesh (and checkMesh) but for some reason the diameter of the bend seems smaller than the diameter of the rest of the pipe. I've checked every node and block like 5 times and everything seems to be in order. Does anybody see what mistake(s) I made? Thanks in advance! This is my blockMeshDict (in the attachment a picture of my mesh in paraFoam)

Quote:

/*---------------------------------------------------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: 1.3 |
| \\ / A nd | Web: http://www.openfoam.org |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;

root "";
case "";
instance "";
local "";

class dictionary;
object blockMeshDict;
}

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

convertToMeters 1;

vertices
(
// pipe horizontal
(0 0 0) // 0
(1 0 0) // 1
(1 0.12 0) // 2
(0 0.12 0) // 3
(0 0 0.12) // 4
(1 0 0.12) // 5
(1 0.12 0.12) // 6
(0 0.12 0.12) // 7

// bend region
(1.34 0 -0.34) // 8
(1.46 0 -0.34) // 9
(1.46 0.12 -0.34) // 10
(1.34 0.12 -0.34) // 11

// pipe vertical
(1.34 0 -1.34) // 12
(1.46 0 -1.34) // 13
(1.46 0.12 -1.34) // 14
(1.34 0.12 -1.34) // 15

// cylinder nodes
(0 -0.01071 -0.01071) // 16
(0 0.13071 -0.01071) // 17
(0 0.13071 0.13071) // 18
(0 -0.01071 0.13071) // 19

(1 -0.0107 -0.01071) // 20
(1 0.13071 -0.01071) // 21
(1 0.13071 0.13071) // 22
(1 -0.01071 0.13071) // 23

(1.32929 -0.01071 -0.34) // 24
(1.47071 -0.01071 -0.34) // 25
(1.47071 0.13071 -0.34) // 26
(1.32929 0.13071 -0.34) // 27

(1.32929 -0.01071 -1.34) // 28
(1.47071 -0.01071 -1.34) // 29
(1.47071 0.13071 -1.34) // 30
(1.32929 0.13071 -1.34) // 31
);

blocks
(
// inlet block
hex (0 1 2 3 4 5 6 7) (10 10 10) simpleGrading (1 1 1)
hex (4 5 6 7 19 23 22 18) (10 10 10) simpleGrading (1 1 1)
hex (3 2 21 17 7 6 22 18) (10 10 10) simpleGrading (1 1 1)
hex (16 20 21 17 0 1 2 3) (10 10 10) simpleGrading (1 1 1)
hex (16 20 1 0 19 23 5 4) (10 10 10) simpleGrading (1 1 1)

// bend block
hex (1 8 11 2 5 9 10 6) (10 10 10) simpleGrading (1 1 1)
hex (5 9 10 6 23 25 26 22) (10 10 10) simpleGrading (1 1 1)
hex (2 11 27 21 6 10 26 22) (10 10 10) simpleGrading (1 1 1)
hex (20 24 27 21 1 8 11 2) (10 10 10) simpleGrading (1 1 1)
hex (20 24 8 1 23 25 9 5) (10 10 10) simpleGrading (1 1 1)

// outlet block
hex (12 13 14 15 8 9 10 11) (10 10 10) simpleGrading (1 1 1)
hex (13 29 30 14 9 25 26 10) (10 10 10) simpleGrading (1 1 1)
hex (15 14 30 31 11 10 26 27) (10 10 10) simpleGrading (1 1 1)
hex (28 12 15 31 24 8 11 27) (10 10 10) simpleGrading (1 1 1)
hex (28 29 13 12 24 25 9 8) (10 10 10) simpleGrading (1 1 1)

);

edges
(
// cylinder 1
arc 16 17 (0 0.06 -0.04)
arc 17 18 (0 0.16 0.04)
arc 18 19 (0 0.06 0.16)
arc 19 16 (0 -0.04 0.06)
// cylinder 2
arc 20 21 (1 0.06 -0.04)
arc 21 22 (1 0.16 0.04)
arc 22 23 (1 0.06 0.16)
arc 23 20 (1 -0.04 0.06)
// cylinder 3
arc 24 25 (1.4 -0.04 -0.34)
arc 25 26 (1.5 0.06 -0.34)
arc 26 27 (1.4 0.16 -0.34)
arc 27 24 (1.3 0.06 -0.34)
// cylinder 4
arc 28 29 (1.4 -0.04 -1.34)
arc 29 30 (1.5 0.06 -1.34)
arc 30 31 (1.4 0.16 -1.34)
arc 31 28 (1.3 0.06 -1.34)
// bend
arc 1 8 (1.24041 0 -0.09958)
arc 5 9 (1.32527 0 -0.01473)
arc 2 11 (1.24041 0.12 -0.09958)
arc 6 10 (1.32527 0.12 -0.01473)

arc 20 24 (1.23284 -0.01071 -0.10716)
arc 21 27 (1.23284 0.13071 -0.10716)
arc 23 25 (1.33284 -0.01071 -0.00715)
arc 22 26 (1.33284 0.13071 -0.00715)
);

patches
(

patch inlet
(
(4 7 3 0)
(19 18 7 4)
(7 18 17 3)
(0 3 17 16)
(19 4 0 16)
)
patch outlet
(
(12 15 14 13)
(28 31 15 12)
(15 31 30 14)
(13 14 30 29)
(28 12 13 29)
)
wall walls
(
(19 23 22 18)
(17 18 22 21)
(16 17 21 20)
(23 19 16 20)
(20 21 27 24)
(21 22 26 27)
(23 25 26 22)
(23 20 24 25)
(24 27 31 28)
(27 26 30 31)
(26 25 29 30)
(25 24 28 29)
)
);

mergePatchPairs
(
);

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