/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  v2012                                 |
|   \\  /    A nd           | Website:  www.openfoam.com                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       dictionary;
    object      blockMeshDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

scale   1;

// Geometric parameters
rxo 2;
ryo 3;
rzo 4;

// Divisions in x/y/z directions. Can be unequal.
nx   30;
ny   24;
nz   20;

geometry
{
    sphere
    {
        type    sphere;
        origin  (0 0 0);
        radius  ($rxo $ryo $rzo);
    }
}

// Box sizes
vxo #eval{sqrt(1.0/3.0) * $rxo};  mvxo #eval{-$vxo};
vyo #eval{sqrt(1.0/3.0) * $ryo};  mvyo #eval{-$vyo};
vzo #eval{sqrt(1.0/3.0) * $rzo};  mvzo #eval{-$vzo};

vertices
(
    // Outer block points
    project ($mvxo $mvyo $mvzo) (sphere)
    project ( $vxo $mvyo $mvzo) (sphere)
    project ( $vxo  $vyo $mvzo) (sphere)
    project ($mvxo  $vyo $mvzo) (sphere)
    project ($mvxo $mvyo  $vzo) (sphere)
    project ( $vxo $mvyo  $vzo) (sphere)
    project ( $vxo  $vyo  $vzo) (sphere)
    project ($mvxo  $vyo  $vzo) (sphere)
);

blocks
(
    hex (0 1 2 3 4 5 6 7) ($nx $ny $nz) grading (1 1 1)
);

edges
(
    // Outer edges
    project 0 1 (sphere)
    project 2 3 (sphere)
    project 6 7 (sphere)
    project 4 5 (sphere)

    project 0 3 (sphere)
    project 1 2 (sphere)
    project 5 6 (sphere)
    project 4 7 (sphere)

    project 0 4 (sphere)
    project 1 5 (sphere)
    project 2 6 (sphere)
    project 3 7 (sphere)
);

faces
(
    project (0 4 7 3) sphere  // x-min
    project (1 2 6 5) sphere  // x-max
    project (0 1 5 4) sphere  // y-min
    project (3 7 6 2) sphere  // y-max
    project (0 3 2 1) sphere  // z-min
    project (4 5 6 7) sphere  // z-max
);

boundary
(
    walls
    {
        type wall;
        faces
        (
            (0 4 7 3)  // x-min
            (1 2 6 5)  // x-max
            (0 1 5 4)  // y-min
            (3 7 6 2)  // y-max
            (0 3 2 1)  // z-min
            (4 5 6 7)  // z-max
        );
    }
);

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