[aerospacious]

Dear Foamers!


I am very new to openFoam and run in some troubles with blockMesh. I've already done the cavity and hole in plate tutorial and I'm currently trying to generate my own mesh using the blockMeshDict file.
Unfortunately when I run it it gives the following error:


--> FOAM FATAL IO ERROR:
"ill defined primitiveEntry starting at keyword 'blocks' on line 42 and ending at line 114"


my blockmesh script is:

/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  5                                     |
|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       dictionary;
    object      blockMeshDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

convertToMeters 1;

vertices
(
    (-5, -5,  5) // 0
    ( 0, -5,  5) // 1
    ( 5, -5,  5) // 2
    ( 5,  0,  5) // 3
    ( 0,  0,  5) // 4
    (-5,  0,  5) // 5
    (-5, -5,  0) // 6
    ( 0, -5,  0) // 7
    ( 5, -5,  0) // 8
    ( 5,  0,  0) // 9
    ( 0,  0,  0) // 10
    (-5,  0,  0) // 11
    (-5, -5, -5) // 12
    ( 0, -5, -5) // 13
    ( 5, -5, -5) // 14
    ( 5,  0, -5) // 15
    ( 0,  0, -5) // 16
    (-5,  0, -5) // 17
);

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

edges
(
);

boundary
(
    inlet
    {
        type wall;
        faces
        (
            (0 6  11 5)
            (6 12 17 11)
        );
    }
    outlet
    {
        type wall;
        faces
        (
            (2 8  9  3)
            (8 14 15 9)
        );
    }
    top
    {
        type wall;
        faces
        (
            (5  4  10 11)
            (4  3  9  10)
            (11 10 16 17)
            (10 9  15 16)
        );
    }
    bottom
    {
        type wall;
        faces
        (
            (0 1 7  6)
            (1 2 8  7)
            (6 7 13 12)
            (7 8 14 13)
        );
    }
    frontAndBack
    {
        type empty;
        faces
        (
            (0  1  4  5)
            (1  2  3  4)
            (12 13 16 17)
            (13 14 15 16)
        );
    }
);

mergePatchPairs
(
);

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

The geometry I try to create is shown in the attached image.

Thanks in advance for everyone's help


Timo

[tomf]

Hi,

My guess would be the comma's in the vertices section, try this instead:

vertices
(
    (-5 -5  5) // 0
    ( 0 -5  5) // 1
    ( 5 -5  5) // 2
    ( 5  0  5) // 3
    ( 0  0  5) // 4
    (-5  0  5) // 5
    (-5 -5  0) // 6
    ( 0 -5  0) // 7
    ( 5 -5  0) // 8
    ( 5  0  0) // 9
    ( 0  0  0) // 10
    (-5  0  0) // 11
    (-5 -5 -5) // 12
    ( 0 -5 -5) // 13
    ( 5 -5 -5) // 14
    ( 5  0 -5) // 15
    ( 0  0 -5) // 16
    (-5  0 -5) // 17
);

[aerospacious]

Thanks for the reply Tom, but unfortunately that does not work.
It gives the error at 'blocks' so I would assume I did something wrong there, but just can't see what (probably overlooking some rule I should have applied).

[tomf]

Ok, I just ran a test.

You are right that my suggestion did not solve the original issue, but it is necessary. The actual thing that goes wrong is there is a space missing after hex. This works, but generates an inside-out error. I guess you should check your order for the blocks to correspond with the order OpenFOAM expects:

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

[aerospacious]

You're awesome Tom!
That helped a lot. I already figured out the inside out error yesterday so I just ran it without problems.
Thanks again!