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 Bnr (200 0 0)
    name Fnr (200 0 1)
);

blocks
(
//    name total hex (Fbl Fbr Ftr Ftl Bbl Bbr Btr Btl) (50 5 1) simpleGrading (1 1 1)
      name blbarc hex (Fbl Fbm Fcb Fcbl Bbl Bbm Bcb Bcbl) ($arcNx $arcNy 1) simpleGrading (1 1 1)
      name bltarc hex (Fnl Fbl Fcbl Fcl Bnl Bbl Bcbl Bcl) ($arcNx $arcNy 1) simpleGrading (1 1 1)
      name tlbarc hex (Ftl Fnl Fcl Fctl Btl Bnl Bcl Bctl) ($arcNx $arcNy 1) simpleGrading (1 1 1)
      name tltarc hex (Ftm Ftl Fctl Fct Btm Btl Bctl Bct) ($arcNx $arcNy 1) simpleGrading (1 1 1)
      name trtarc hex (Fts Ftm Fct Fctr Bts Btm Bct Bctr) ($arcNx $arcNy 1) simpleGrading (1 1 1)
      name trbarc hex (Fns Fts Fctr Fcr Bns Bts Bctr Bcr) ($arcNx $arcNy 1) simpleGrading (1 1 1)
      name brtarc hex (Fbs Fns Fcr Fcbr Bbs Bns Bcr Bcbr) ($arcNx $arcNy 1) simpleGrading (1 1 1)
      name brbarc hex (Fbm Fbs Fcbr Fcb Bbm Bbs Bcbr Bcb) ($arcNx $arcNy 1) simpleGrading (1 1 1)
      name pipetr hex (Fns Fnr Ftr Fts Bns Bnr Btr Bts) (#calc "12 * $arcNy" #calc "$arcNx" 1) simpleGrading (1 1 1)
      name pipebr hex (Fbs Fbr Fnr Fns Bbs Bbr Bnr Bns) (#calc "12 * $arcNy" #calc "$arcNx" 1) simpleGrading (1 1 1)
);

edges
(
);

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
(
);

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