blockMeshDict

/*--------------------------------*- C++ -*----------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     | Website:  https://openfoam.org
    \\  /    A nd           | Version:  8
     \\/     M anipulation  |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       dictionary;
    object      blockMeshDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

convertToMeters 0.01;  // centimetres.  According to https://cfd.direct/openfoam/user-guide/v8-blockmesh/

#include "../scale";  // gives global N
rx 3.5355339059327373;
arcNx #calc "3 * $N";
arcNy #calc " 2 * $N";

// = // rx #calc "5.0 / Foam::sqrt(2.0)";  // length of short side of rectangular triangle with long side =5

vertices
(
    // F = front (z = 0), B = back   (z = 1)
    // bottom = b, t = top, n = middle (left/right of center of cylinder)
    // l = left, r = right, m = middle (under center of cylinder), s = other square around cylinder corner
    // c = cylinder
    // (0, 0, 0) = center of cylinder in front
    name Fbl (-20 -20 0)
    name Bbl (-20 -20 1)
    name Fbs (20 -20 0)
    name Bbs (20 -20 1)
    name Fbr (200 -20 0)
    name Bbr (200 -20 1)
    name Ftl (-20 21 0)
    name Btl (-20 21 1)
    name Fts (20 21 0)
    name Bts (20 21 1)
    name Ftr (200 21 0)
    name Btr (200 21 1)
    name Fcl (-5 0 0)
    name Bcl (-5 0 1)
    name Fcb (0 -5 0)
    name Bcb (0 -5 1)
    name Fcr (5 0 0)
    name Bcr (5 0 1)
    name Fct (0 5 0)
    name Bct (0 5 1)
    name Fcbl (#calc "-$rx" #calc "-$rx" 0) 
    name Bcbl (#calc "-$rx" #calc "-$rx" 1) 
    name Fcbr ($rx #calc "-$rx" 0)
    name Bcbr ($rx #calc "-$rx" 1)
    name Fctl (#calc "-$rx" $rx 0) 
    name Bctl (#calc "-$rx" $rx 1) 
    name Fctr ($rx $rx 0)
    name Bctr ($rx $rx 1)
    name Fnl (-20 0 0)
    name Bnl (-20 0 1)
    name Fnr (200 0 0)
    name Bnr (200 0 1)
    name Fbm (0 -20 0)
    name Bbm (0 -20 1)
    name Ftm (0 21 0)
    name Btm (0 21 1)
    name Fns (20 0 0)
    name Bns (20 0 1)
    name Fnm (0 0 0)  
    name Bnm (0 0 1)
);

blocks
(
      name arcl hex (Ftl Fbl Fcbl Fctl Btl Bbl Bcbl Bctl) ($arcNx $arcNy 1) simpleGrading (1 1 1)
      name arct hex (Fts Ftl Fctl Fctr Bts Btl Bctl Bctr) ($arcNx $arcNy 1) simpleGrading (1 1 1)
      name arct hex (Fbs Fts Fctr Fcbr Bbs Bts Bctr Bcbr) ($arcNx $arcNy 1) simpleGrading (1 1 1)
      name arct hex (Fbl Fbs Fcbr Fcbl Bbl Bbs Bcbr Bcbl) ($arcNx $arcNy 1) simpleGrading (1 1 1)
      name pipe hex (Fbs Fbr Ftr Fts Bbs Bbr Btr Bts) (#calc "12 * $arcNy" $arcNx 1) simpleGrading (1 1 1)
);

edges
(
    arc Fcbl Fctl (-5 0 0)   // = Fcl
    arc Fctl Fctr (0 5 0)    // = Fct
    arc Fctr Fcbr (5 0 0)    // = Fcr
    arc Fcbr Fcbl (0 -5 0)   // = Fcb
    arc Bcbl Bctl (-5 0 0)   // = Bcl
    arc Bctl Bctr (0 5 0)    // = Bct
    arc Bctr Bcbr (5 0 0)    // = Bcr
    arc Bcbr Bcbl (0 -5 0)   // = Bcb
);

boundary
(
/*
    movingWall
    {
        type wall;
        faces
        (
            (3 7 6 2)
        );
    }
    fixedWalls
    {
        type wall;
        faces
        (
            (0 4 7 3)
            (2 6 5 1)
            (1 5 4 0)
        );
    }
    frontAndBack
    {
        type empty;
        faces
        (
            (0 3 2 1)
            (4 5 6 7)
        );
    }
*/
);

mergePatchPairs
(
);

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