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

convertToMeters 1.0;

hub            0.005;
rotorBlades     0.02;
freestream       0.1;
halfDepth      0.005;
angle             90;

nRadialRotorCells  6;
nRadialOuterCells 24;
nCircCells        24;

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

vertices #codeStream
{
    codeInclude
    #{
        #include "pointField.H"
        #include "transformField.H"
    #};

    code
    #{
        const pointField initPoints
        ({
            point(-$freestream,  0, -$halfDepth),
            point(-$rotorBlades, 0, -$halfDepth),
            point(-$hub,         0, -$halfDepth),
            point(-$hub,         0, -$halfDepth),
        });

        pointField points;

        // Rotate points around z-axis and append
        for (label i = 0; i < 4; i++)
        {
            points.append(transform(Rz(degToRad(i*$angle)), initPoints));
        }

        // Duplicate z points
        points.append(points + vector(0, 0, 2*$halfDepth));

        os  << points;
    #};
};

rotorBlock ($nCircCells $nRadialRotorCells 1) simpleGrading (1 1 1);
outerBlock ($nCircCells $nRadialOuterCells 1) simpleGrading (1 1 1);

blocks
(
    hex (6 2 1 5 22 18 17 21)    $rotorBlock
    hex (10 7 5 9 26 23 21 25)   $rotorBlock
    hex (14 11 9 13 30 27 25 29) $rotorBlock
    hex (3 15 13 1 19 31 29 17)  $rotorBlock

    hex (5 1 0 4 21 17 16 20)    $outerBlock
    hex (9 5 4 8 25 21 20 24)    $outerBlock
    hex (13 9 8 12 29 25 24 28)  $outerBlock
    hex (1 13 12 0 17 29 28 16)  $outerBlock
);

circle $angle (0 0 1);

edges
(
    arc 2 6   $circle
    arc 7 10  $circle
    arc 11 14 $circle
    arc 15 3  $circle
    arc 18 22 $circle
    arc 23 26 $circle
    arc 27 30 $circle
    arc 31 19 $circle

    arc 1 5   $circle
    arc 5 9   $circle
    arc 9 13  $circle
    arc 13 1  $circle
    arc 17 21 $circle
    arc 21 25 $circle
    arc 25 29 $circle
    arc 29 17 $circle

    arc 0 4   $circle
    arc 4 8   $circle
    arc 8 12  $circle
    arc 12 0  $circle
    arc 16 20 $circle
    arc 20 24 $circle
    arc 24 28 $circle
    arc 28 16 $circle

);

defaultPatch
{
    name walls;
    type wall;
}

boundary
(
    rotor
    {
        type wall;
        faces
        (
            (2 18 22 6)
            (7 23 26 10)
            (11 27 30 14)
            (15 31 19 3)
            (1 17 18 2)
            (17 1 3 19)
            (5 21 22 6)
            (21 5 7 23)
            (26 10 9 25)
            (11 27 25 9)
            (30 14 13 29)
            (29 13 15 31)
        );
    }

    freestream
    {
        type wall;
        faces
        (
            (16 0 4 20)
            (20 4 8 24)
            (24 8 12 28)
            (28 12 0 16)
        );
    }

    front
    {
        type empty;
        faces
        (
            (17 21 22 18)
            (21 25 26 23)
            (25 29 30 27)
            (29 17 19 31)
            (16 20 21 17)
            (20 24 25 21)
            (25 24 28 29)
            (29 28 16 17)
        );
    }

    back
    {
        type empty;
        faces
        (
            (5 1 2 6)
            (5 7 10 9)
            (9 11 14 13)
            (15 3 1 13)
            (0 1 5 4)
            (4 5 9 8)
            (8 9 13 12)
            (12 13 1 0)
        );
    }
);

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