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[blockMesh] blockMesh seems to create internal barriers

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Old   July 17, 2018, 09:58
Default blockMesh seems to create internal barriers
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Jeremy Dudley
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I am trying to create a simple structure using three blocks, to represent an inlet, main body, and outlet. When I do this the concentration of the inlet seems always to stay within the 1st block, and never to flow through to the other two blocks. I got a message that there were two internal faces, but when I view the grid (paraview or enGrid) I cannot see any internal face. Can anyone spot what I am doin gwrong?



vertices (
( 0.0 0.0 0.0) // 0
(26.5 0.0 0.0) // 1 -- 0 - 1 defines X
(26.5 17.0 0.0) // 2 -- 1 - 2 defines Y
( 0.0 17.0 0.0) // 3 -- 0 - 1 - 2 - 3 defines Z

( 0.0 0.0 0.026) // 4
(26.5 0.0 0.026) // 5
(26.5 17.0 0.026) // 6
( 0.0 17.0 0.026) // 7

( 0.0 0.0 4.974) // 8
(26.5 0.0 4.974) // 9
(26.5 17.0 4.974) // 10
( 0.0 17.0 4.974) // 11

( 0.0 0.0 5.0) // 12
(26.5 0.0 5.0) // 13
(26.5 17.0 5.0) // 14
( 0.0 17.0 5.0) // 15
);

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

boundary (
inlet {type patch;
faces ( (0 4 7 3));
}
outlet { type patch;
faces ((9 13 14 10));
}
surface { type patch;
faces ((12 13 14 15));
}
);

mergePatchPairs ();
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