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[blockMesh] BlockMesh: simpleGrading problem

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Old   April 24, 2020, 10:28
Default BlockMesh: simpleGrading problem
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Daniel
Join Date: Nov 2019
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Hello Everyone,

i am trying to mesh a simple geometry with blockMesh. Now i want to refine some regions with simpleGrading, but it only works with 1 in z-Direction. I put everywhere the same number of cells but (15 1 x>1) etc. is not working.

--> FOAM FATAL ERROR:
Inconsistent point locations between block pair 1 and 2
probably due to inconsistent grading.

(2 in z-Direction for hex I - V)

When i am putting in first the z-Lines there is no Problem, but then blockMesh will not grade the mesh.

CheckMesh only failed the check about the aspectRatios which should be irrelevant.

Here is my blockMesh dict

vertices
(
(0 0 0) //0 Block
(1.2 0 0) //1
(1.9 0 0) //2
(2.1 0 0) //3
(2.8 0 0) //4
(4 0 0) //5

(4 0.5 0) //6
(2.8 0.5 0) //7
(2.1 0.5 0) //8
(1.9 0.5 0) //9
(1.2 0.5 0) //10
(0 0.5 0) //11

(0 0 1) //12
(1.2 0 1) //13
(1.9 0 1) //14
(2.1 0 1) //15
(2.8 0 1) //16
(4 0 1) //17

(4 0.5 1) //18
(2.8 0.5 1) //19
(2.1 0.5 1) //20
(1.9 0.5 1) //21
(1.2 0.5 1) //22
(0 0.5 1) //23

(0 0 3) //24
(1.2 0 3) //25
(1.9 0 3) //26
(2.1 0 3) //27
(2.8 0 3) //28
(4 0 3) //29

(4 0.5 3) //30
(2.8 0.5 3) //31
(2.1 0.5 3) //32
(1.9 0.5 3) //33
(1.2 0.5 3) //34
(0 0.5 3) //35

(1.7 0 -5) //36 Düse
(2.3 0 -5) //37
(2.3 0.5 -5) //38
(1.7 0.5 -5) //39

);

blocks
(
hex (0 1 10 11 12 13 22 23) (15 1 1) simpleGrading (1 1 1) //I Block
hex (1 2 9 10 13 14 21 22) (25 1 1) simpleGrading (1 1 1) //II
hex (2 3 8 9 14 15 20 21) (75 1 1) //III
simpleGrading
(
(
(0.5 0.5 4) // 50% y-dir, 50% cells, expansion = 4
(0.5 0.5 0.25) // 50% y-dir, 50% cells, expansion = 0.25
)
2 //Y-Richtung
3 //Z-Richtung
)

hex (3 4 7 8 15 16 19 20) (25 1 1) simpleGrading (1 1 1) //IV
hex (4 5 6 7 16 17 18 19) (15 1 1) simpleGrading (1 1 1) //V
hex (12 13 22 23 24 25 34 35) (15 1 1) simpleGrading (1 1 1) //VI
hex (13 14 21 22 25 26 33 34) (25 1 1) simpleGrading (1 1 1) //VII
hex (14 15 20 21 26 27 32 33) (75 1 1) //VIII
simpleGrading
(
(
(0.5 0.5 4) // 50% y-dir, 50% cells, expansion = 4
(0.5 0.5 0.25) // 50% y-dir, 50% cells, expansion = 0.25
)
2 //Y-Richtung
3 //Z-Richtung
)

hex (15 16 19 20 27 28 31 32) (25 1 1) simpleGrading (1 1 1) //IX
hex (16 17 18 19 28 29 30 31) (15 1 1) simpleGrading (1 1 1) //X
hex (36 37 38 39 2 3 8 9) (75 1 200) //XI Düse
simpleGrading
(
(
(0.5 0.5 4) // 50% y-dir, 50% cells, expansion = 4
(0.5 0.5 0.25) // 50% y-dir, 50% cells, expansion = 0.25
)
2 //Y-Richtung
3 //Z-Richtung
)

);

edges
(
);

boundary
(
fixedWalls
{
type wall;
faces
(
(0 11 23 12) //Seite links
(12 23 35 24)

(5 6 18 17) //Seite rechts
(17 18 30 29)

(0 1 10 11) //Boden
(1 2 9 10)
(3 4 7 8)
(4 5 6 7)

(24 25 34 35) //Decke
(25 26 33 34)
(26 27 32 33)
(27 28 31 32)
(28 29 30 31)

(36 39 9 2) //Düse links
(37 38 8 3) //Düse rechts
(36 37 38 39) //Düse Unten

);
}
frontAndBack
{
type empty;
faces
(
(0 1 13 12) //Vorne unten
(1 2 14 13)
(2 3 15 14)
(3 4 16 15)
(4 5 17 16)

(12 13 25 24) //Vorne oben
(13 14 26 25)
(14 15 27 26)
(15 16 28 27)
(16 17 29 28)

(11 10 22 23) //Hinten unten
(10 9 21 22)
(9 8 20 21)
(8 7 19 20)
(7 6 18 19)

(23 22 34 35) //Hinten oben
(22 21 33 34)
(21 20 32 33)
(20 19 31 32)
(19 18 30 31)

(36 37 3 2) // Düse vorne
(39 38 8 9) // Düse hinten
);
}
);
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blockmeshdict, meshing 2d, openfoam 1806, refinement

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