openfoam/tutorials/mesh/createPatch/TJunctionSwitching_createPatch/top/system/blockMeshDict

/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  v2506                                 |
|   \\  /    A nd           | Website:  www.openfoam.com                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       dictionary;
    object      blockMeshDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

//           outlet1
//             +-+
//             | |
//             | |
//             | |
//             | |
// +-----------+-+
// |inlet      | |
// +-----------+-+
//             | |
//             | |
//             | |
//             | |
//             +-+
//           outlet2

scale   1;

vertices
(
    (0.2   0.02 0)  //12=0
    (0.22  0.02 0)  //13=1
    (0.22  0.21 0)  //14=2
    (0.2   0.21 0)  //15=3

    // Z
    (0.2   0.02 0.01)   //28=4
    (0.22  0.02 0.01)   //29=5
    (0.22  0.21 0.01)   //30=6
    (0.2   0.21 0.01)   //31=7
);

blocks
(
    // top block
    hex (0 1 2 3 4 5 6 7) top (5 50 1) simpleGrading (1 1 1)
);

edges
(
);

boundary
(
    top_outlet
    {
        type patch;
        faces
        (
            //(14 15 31 30)
            (2 3 7 6) 
        );
    }

    top_walls
    {
        type wall;
        faces
        (
            // Top block
            (1 2 6 5)
            (0 4 7 3)
        );
    }

    // Central - Top block
    // ~~~~~~~~~~~~~~~~~~~

    top_couple
    {
        type            wall;
        faces
        (
            (0 1 5 4)
        );
    }
);


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