ENH: Added new utility to create a box of isotropic turbulence
This commit is contained in:
Andrew Heather
parent
546de48ffe
commit
a1558b88f5
@ -0,0 +1,3 @@
|
||||
createBoxTurb.C
|
||||
|
||||
EXE = $(FOAM_APPBIN)/createBoxTurb
|
||||
@ -0,0 +1,12 @@
|
||||
EXE_INC = \
|
||||
-I$(LIB_SRC)/finiteVolume/lnInclude \
|
||||
-I$(LIB_SRC)/meshTools/lnInclude \
|
||||
-I$(LIB_SRC)/mesh/blockMesh/lnInclude \
|
||||
-I$(LIB_SRC)/fileFormats/lnInclude
|
||||
|
||||
|
||||
EXE_LIBS = \
|
||||
-lfiniteVolume \
|
||||
-lmeshTools \
|
||||
-lblockMesh \
|
||||
-lfileFormats
|
||||
@ -0,0 +1,104 @@
|
||||
const cellModel& hex = cellModel::ref(cellModel::HEX);
|
||||
|
||||
cellShapeList cellShapes;
|
||||
faceListList boundary;
|
||||
pointField points;
|
||||
{
|
||||
Info<< "Creating block" << endl;
|
||||
|
||||
block b
|
||||
(
|
||||
cellShape(hex, identity(8), false),
|
||||
pointField
|
||||
(
|
||||
{
|
||||
point(0, 0, 0),
|
||||
point(L.x(), 0, 0),
|
||||
point(L.x(), L.y(), 0),
|
||||
point(0, L.y(), 0),
|
||||
point(0, 0, L.z()),
|
||||
point(L.x(), 0, L.z()),
|
||||
point(L.x(), L.y(), L.z()),
|
||||
point(0, L.y(), L.z())
|
||||
}
|
||||
),
|
||||
blockEdgeList(),
|
||||
blockFaceList(),
|
||||
N,
|
||||
List<gradingDescriptors>(12)
|
||||
);
|
||||
|
||||
Info<< "Creating cells" << endl;
|
||||
|
||||
List<FixedList<label, 8>> bCells(b.cells());
|
||||
cellShapes.setSize(bCells.size());
|
||||
forAll(cellShapes, celli)
|
||||
{
|
||||
cellShapes[celli] =
|
||||
cellShape(hex, labelList(bCells[celli]), false);
|
||||
}
|
||||
|
||||
Info<< "Creating boundary faces" << endl;
|
||||
|
||||
boundary.setSize(b.boundaryPatches().size());
|
||||
forAll(boundary, patchi)
|
||||
{
|
||||
faceList faces(b.boundaryPatches()[patchi].size());
|
||||
forAll(faces, facei)
|
||||
{
|
||||
faces[facei] = face(b.boundaryPatches()[patchi][facei]);
|
||||
}
|
||||
boundary[patchi].transfer(faces);
|
||||
}
|
||||
|
||||
points.transfer(const_cast<pointField&>(b.points()));
|
||||
}
|
||||
|
||||
Info<< "Creating patch dictionaries" << endl;
|
||||
wordList patchNames(boundary.size());
|
||||
forAll(patchNames, patchi)
|
||||
{
|
||||
patchNames[patchi] = "patch" + Foam::name(patchi);
|
||||
}
|
||||
|
||||
PtrList<dictionary> boundaryDicts(boundary.size());
|
||||
forAll(boundaryDicts, patchi)
|
||||
{
|
||||
boundaryDicts.set(patchi, new dictionary());
|
||||
dictionary& patchDict = boundaryDicts[patchi];
|
||||
word nbrPatchName;
|
||||
if (patchi % 2 == 0)
|
||||
{
|
||||
nbrPatchName = "patch" + Foam::name(patchi + 1);
|
||||
}
|
||||
else
|
||||
{
|
||||
nbrPatchName = "patch" + Foam::name(patchi - 1);
|
||||
}
|
||||
|
||||
patchDict.add("type", cyclicPolyPatch::typeName);
|
||||
patchDict.add("neighbourPatch", nbrPatchName);
|
||||
}
|
||||
|
||||
Info<< "Creating polyMesh" << endl;
|
||||
polyMesh mesh
|
||||
(
|
||||
IOobject
|
||||
(
|
||||
polyMesh::defaultRegion,
|
||||
runTime.constant(),
|
||||
runTime,
|
||||
IOobject::NO_READ
|
||||
),
|
||||
std::move(points),
|
||||
cellShapes,
|
||||
boundary,
|
||||
patchNames,
|
||||
boundaryDicts,
|
||||
"defaultFaces",
|
||||
cyclicPolyPatch::typeName,
|
||||
false
|
||||
);
|
||||
|
||||
Info<< "Writing polyMesh" << endl;
|
||||
mesh.write();
|
||||
@ -0,0 +1,184 @@
|
||||
/*---------------------------------------------------------------------------*\
|
||||
========= |
|
||||
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
|
||||
\\ / O peration |
|
||||
\\ / A nd | Copyright (C) 2018 OpenCFD Ltd.
|
||||
\\/ M anipulation |
|
||||
-------------------------------------------------------------------------------
|
||||
License
|
||||
This file is part of OpenFOAM.
|
||||
|
||||
OpenFOAM is free software: you can redistribute it and/or modify it
|
||||
under the terms of the GNU General Public License as published by
|
||||
the Free Software Foundation, either version 3 of the License, or
|
||||
(at your option) any later version.
|
||||
|
||||
OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
|
||||
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
||||
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
||||
for more details.
|
||||
|
||||
You should have received a copy of the GNU General Public License
|
||||
along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
Application
|
||||
createBoxTurb
|
||||
|
||||
Description
|
||||
Creates a box of isotropic turbulence based on a user-specified
|
||||
energy spectrum.
|
||||
|
||||
Based on the reference
|
||||
\verbatim
|
||||
Saad, T., Cline, D., Stoll, R., Sutherland, J.C.
|
||||
"Scalable Tools for Generating Synthetic Isotropic Turbulence with
|
||||
Arbitrary Spectra"
|
||||
AIAA Journal, Vol. 55, No. 1 (2017), pp. 327-331.
|
||||
\endverbatim
|
||||
|
||||
The \c -createBlockMesh option creates a block mesh and exits, which
|
||||
can then be decomposed and the utility run in parallel.
|
||||
|
||||
\*---------------------------------------------------------------------------*/
|
||||
|
||||
#include "fvCFD.H"
|
||||
#include "block.H"
|
||||
#include "mathematicalConstants.H"
|
||||
|
||||
using namespace Foam::constant;
|
||||
|
||||
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
|
||||
|
||||
Foam::vector randomUnitVector(Random& rndGen)
|
||||
{
|
||||
// Sample point on a sphere
|
||||
scalar t = rndGen.globalPosition<scalar>(-1, 1);
|
||||
scalar phim = rndGen.globalSample01<scalar>()*mathematical::twoPi;
|
||||
scalar thetam = Foam::acos(t);
|
||||
|
||||
return vector
|
||||
(
|
||||
Foam::sin(thetam*Foam::cos(phim)),
|
||||
Foam::sin(thetam*Foam::sin(phim)),
|
||||
Foam::cos(thetam)
|
||||
);
|
||||
}
|
||||
|
||||
|
||||
int main(int argc, char *argv[])
|
||||
{
|
||||
argList::addBoolOption
|
||||
(
|
||||
"createBlockMesh",
|
||||
"create the block mesh and exit"
|
||||
);
|
||||
|
||||
#include "setRootCase.H"
|
||||
|
||||
#include "createTime.H"
|
||||
#include "createFields.H"
|
||||
|
||||
if (args.found("createBlockMesh"))
|
||||
{
|
||||
// Create a box block mesh with cyclic patches
|
||||
#include "createBlockMesh.H"
|
||||
return 0;
|
||||
}
|
||||
|
||||
#include "createMesh.H"
|
||||
|
||||
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
|
||||
|
||||
// Minimum wave number
|
||||
scalar kappa0 = mathematical::twoPi/cmptMin(L);
|
||||
|
||||
// Maximum wave number
|
||||
scalar kappaMax = mathematical::pi/cmptMin(delta);
|
||||
|
||||
Info<< "Wave number min/max = " << kappa0 << ", " << kappaMax << endl;
|
||||
|
||||
Info<< "Generating velocity field" << endl;
|
||||
|
||||
volVectorField U
|
||||
(
|
||||
IOobject
|
||||
(
|
||||
"U",
|
||||
runTime.timeName(),
|
||||
mesh,
|
||||
IOobject::NO_READ,
|
||||
IOobject::NO_WRITE
|
||||
),
|
||||
mesh,
|
||||
dimensionedVector(dimVelocity, Zero)
|
||||
);
|
||||
|
||||
vectorField& Uc = U.primitiveFieldRef();
|
||||
const scalar deltaKappa = (kappaMax - kappa0)/scalar(nModes - 1);
|
||||
const vectorField& C(mesh.C());
|
||||
for (label modei = 1; modei <= nModes; ++modei)
|
||||
{
|
||||
// Equidistant wave mode
|
||||
scalar kappaM = kappa0 + deltaKappa*(modei-1);
|
||||
|
||||
Info<< "Processing mode:" << modei << " kappaM:" << kappaM << endl;
|
||||
|
||||
// Energy
|
||||
scalar E = Ek->value(kappaM);
|
||||
|
||||
// Wave amplitude
|
||||
scalar qm = Foam::sqrt(E*deltaKappa);
|
||||
|
||||
// Wave number unit vector
|
||||
const vector kappaHatm(randomUnitVector(rndGen));
|
||||
|
||||
vector kappaTildem(0.5*kappaM*cmptMultiply(kappaHatm, delta));
|
||||
for (direction i = 0; i < 3; ++i)
|
||||
{
|
||||
kappaTildem[i] = 2/delta[i]*Foam::sin(kappaTildem[i]);
|
||||
}
|
||||
|
||||
// Intermediate unit vector zeta
|
||||
const vector zetaHatm(randomUnitVector(rndGen));
|
||||
|
||||
// Unit vector sigma
|
||||
vector sigmaHatm(zetaHatm^kappaTildem);
|
||||
sigmaHatm /= mag(kappaTildem);
|
||||
|
||||
// Phase angle
|
||||
scalar psim = 0.5*rndGen.position(-mathematical::pi, mathematical::pi);
|
||||
|
||||
// Add the velocity contribution per mode
|
||||
Uc += 2*qm*cos(kappaM*(kappaHatm & C) + psim)*sigmaHatm;
|
||||
}
|
||||
|
||||
U.write();
|
||||
|
||||
{
|
||||
Info<< "Generating kinetic energy field" << endl;
|
||||
volScalarField k("k", 0.5*magSqr(U));
|
||||
k.write();
|
||||
Info<< "min/max/average k = "
|
||||
<< gMin(k) << ", " << gMax(k) << ", " << gAverage(k)
|
||||
<< endl;
|
||||
}
|
||||
|
||||
{
|
||||
Info<< "Generating div(U) field" << endl;
|
||||
volScalarField divU(fvc::div(U));
|
||||
divU.write();
|
||||
Info<< "min/max/average div(U) = "
|
||||
<< gMin(divU) << ", " << gMax(divU) << ", " << gAverage(divU)
|
||||
<< endl;
|
||||
}
|
||||
|
||||
Info<< nl;
|
||||
runTime.printExecutionTime(Info);
|
||||
|
||||
Info<< "End\n" << endl;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
// ************************************************************************* //
|
||||
@ -0,0 +1,33 @@
|
||||
IOdictionary dict
|
||||
(
|
||||
IOobject
|
||||
(
|
||||
"createBoxTurbDict",
|
||||
runTime.constant(),
|
||||
runTime,
|
||||
IOobject::MUST_READ
|
||||
)
|
||||
);
|
||||
|
||||
// Extents in x, y, z directions
|
||||
const vector L(dict.get<vector>("L"));
|
||||
|
||||
// Number of cells in x, y, z directions
|
||||
const Vector<label> N(dict.get<Vector<label>>("N"));
|
||||
|
||||
// Wave number vs energy profile
|
||||
autoPtr<Function1<scalar>> Ek(Function1<scalar>::New("E", dict));
|
||||
|
||||
// Number of modes
|
||||
const label nModes = dict.get<label>("nModes");
|
||||
|
||||
// Mesh spacing in x, y and z directions
|
||||
const vector delta
|
||||
(
|
||||
L.x()/scalar(N.x()),
|
||||
L.y()/scalar(N.y()),
|
||||
L.z()/scalar(N.z())
|
||||
);
|
||||
|
||||
Random rndGen(1234);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user