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========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Version: dev
\\/ M anipulation |
\*---------------------------------------------------------------------------*/
FoamFile
{
format ascii;
class dictionary;
object blockMeshDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
// In the case system/blockMeshDict, set the following variables:
/*
nBlades 4; // Number of rotor blades
rHub 0.005; // Radius of the hub
rTip 0.02; // Radius of the blade tips
rFreestream 0.1; // Radius of the freestream boundary
halfDepth 0.005; // Half-depth of the 2-D slab
nCellsHubTip 6; // Number of cells radially from hub to blade tip
nCellsTipFreestream 24; // Number of cells radially from blade tip to the
// freestream boundary
nCellsBladeBlade 24; // Number of cells tangentially between blades
*/
// Then #include this file:
/*
#include "$FOAM_TUTORIALS/resources/blockMesh/rotor2D"
*/
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
vertices #codeStream
{
codeInclude
#{
#include "pointField.H"
#include "SubField.H"
#include "transformField.H"
#};
code
#{
// Get the radii. Note using $<scalar>rHub instead of $rHub means that
// rHub can change without needing to recompile this code. The same is
// true for access of other settings throughout this file.
const scalarField rs
({
$<scalar>rHub,
$<scalar>rHub,
$<scalar>rTip,
$<scalar>rFreestream
});
// Create points for the blade aligned with the X-axis
pointField points(4, point(0, 0, -$<scalar>halfDepth));
points.replace(0, -rs);
// Create equivalent points for other blades by rotating
for (label i = 1; i < $<label>nBlades; i ++)
{
points.append
(
transform
(
Rz(degToRad(i*360/scalar($<label>nBlades))),
SubField<point>(points, 4)
)
);
}
// Add the points on the other side of the slab
points.append(points + vector(0, 0, 2*$<scalar>halfDepth));
// Write out
os << points;
#};
};
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
blocks
(
#codeStream
{
codeInclude
#{
#include "labelField.H"
#};
code
#{
const label viN = 4*$<label>nBlades;
auto makeBlock = [&]
(
const label v0,
const label v1,
const label v2,
const label v3,
const label nCellsRadial
)
{
labelField vs({v0%viN, v1%viN, v2%viN, v3%viN});
vs.append(vs + viN);
os << "hex " << vs << " all "
<< Vector<label>(nCellsRadial, $<label>nCellsBladeBlade, 1)
<< " simpleGrading " << Vector<label>(1, 1, 1) << nl;
};
for (label i = 0; i < $<label>nBlades; i ++)
{
const label vi0 = i*4;
makeBlock(vi0+1, vi0+2, vi0+6, vi0+4, $<label>nCellsHubTip);
makeBlock(vi0+2, vi0+3, vi0+7, vi0+6, $<label>nCellsTipFreestream);
}
#};
}
);
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
edges
(
#codeStream
{
code
#{
const label viN = 4*$<label>nBlades;
auto makeArc = [&](const label v0, const label v1)
{
for (label i = 0; i < 2; ++ i)
{
os << "arc " << v0%viN + i*viN << ' ' << v1%viN + i*viN << ' '
<< 360/scalar($<label>nBlades) << ' ' << vector(0, 0, 1) << nl;
}
};
for (label i = 0; i < $<label>nBlades; i ++)
{
const label vi0 = i*4;
makeArc(vi0+1, vi0+4);
makeArc(vi0+2, vi0+6);
makeArc(vi0+3, vi0+7);
}
#};
}
);
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
defaultPatch
{
name frontAndBack;
type empty;
}
boundary
(
rotor
{
type wall;
faces
(
#codeStream
{
code
#{
const label viN = 4*$<label>nBlades;
auto makeFace = [&](const label v0, const label v1)
{
os << labelList({v0%viN, v1%viN, v1%viN+viN, v0%viN+viN});
};
for (label i = 0; i < $<label>nBlades; i ++)
{
const label vi0 = i*4;
makeFace(vi0+2, vi0+1);
makeFace(vi0+1, vi0+4);
makeFace(vi0+4, vi0+6);
}
#};
}
);
}
freestream
{
type wall;
faces
(
#codeStream
{
code
#{
const label viN = 4*$<label>nBlades;
auto makeFace = [&](const label v0, const label v1)
{
os << labelList({v0%viN, v1%viN, v1%viN+viN, v0%viN+viN});
};
for (label i = 0; i < $<label>nBlades; i ++)
{
const label vi0 = i*4;
makeFace(vi0+3, vi0+7);
}
#};
}
);
}
);
// ************************************************************************* //
|