mirror of
https://develop.openfoam.com/Development/openfoam.git
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ENH: fvOptions - added new acousticDampingSource to damp spurious pressure perturbations
This commit is contained in:
Andrew Heather
@ -12,6 +12,7 @@ $(generalSources)/codedSource/codedSource.C
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$(generalSources)/semiImplicitSource/semiImplicitSource.C
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derivedSources=sources/derived
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$(derivedSources)/acousticDampingSource/acousticDampingSource.C
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$(derivedSources)/actuationDiskSource/actuationDiskSource.C
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$(derivedSources)/buoyancyForce/buoyancyForce.C
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$(derivedSources)/buoyancyForce/buoyancyForceIO.C
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@ -0,0 +1,218 @@
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/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
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\\ / O peration |
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\\ / A nd | Copyright (C) 2016 OpenCFD Ltd.
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\\/ M anipulation |
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-------------------------------------------------------------------------------
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License
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This file is part of OpenFOAM.
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OpenFOAM is free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
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\*---------------------------------------------------------------------------*/
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#include "acousticDampingSource.H"
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#include "fvMesh.H"
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#include "fvMatrices.H"
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#include "fvmSup.H"
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#include "addToRunTimeSelectionTable.H"
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#include "mathematicalConstants.H"
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#include "zeroGradientFvPatchFields.H"
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// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
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namespace Foam
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{
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namespace fv
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{
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defineTypeNameAndDebug(acousticDampingSource, 0);
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addToRunTimeSelectionTable
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(
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option,
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acousticDampingSource,
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dictionary
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);
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}
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}
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// * * * * * * * * * * * * Protected Member Functions * * * * * * * * * * * //
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void Foam::fv::acousticDampingSource::setBlendingFactor()
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{
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blendFactor_.internalField() = 1;
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const vectorField& Cf = mesh_.C();
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const scalar pi = constant::mathematical::pi;
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forAll(cells_, i)
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{
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label celli = cells_[i];
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scalar d = mag(Cf[celli] - x0_);
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if (d < r1_)
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{
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blendFactor_[celli] = 0.0;
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}
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else if ((d >= r1_) && (d <= (r1_ + r2_)))
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{
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blendFactor_[celli] = (1.0 - cos(pi*mag(d - r1_)/r2_))/2.0;
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}
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}
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blendFactor_.correctBoundaryConditions();
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}
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// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
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Foam::fv::acousticDampingSource::acousticDampingSource
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(
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const word& name,
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const word& modelType,
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const dictionary& dict,
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const fvMesh& mesh
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)
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:
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cellSetOption(name, modelType, dict, mesh),
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frequency_("frequency", dimless/dimTime, 0),
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blendFactor_
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(
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volScalarField
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(
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IOobject
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(
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name_ + ":blend",
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mesh_.time().timeName(),
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mesh_,
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IOobject::NO_READ,
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IOobject::NO_WRITE
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),
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mesh_,
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dimensionedScalar("blend0", dimless, 1.0),
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zeroGradientFvPatchField<vector>::typeName
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)
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),
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URefName_("unknown-URefName"),
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x0_(Zero),
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r1_(0),
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r2_(0),
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w_(20)
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{
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read(dict);
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}
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// * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
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void Foam::fv::acousticDampingSource::addSup
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(
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fvMatrix<vector>& eqn,
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const label fieldI
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)
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{
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const volVectorField& U = eqn.psi();
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const volScalarField coeff(name_ + ":coeff", w_*frequency_*blendFactor_);
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const volVectorField& URef(mesh().lookupObject<volVectorField>(URefName_));
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fvMatrix<vector> dampingEqn
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(
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fvm::Sp(coeff, U) - coeff*URef
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);
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eqn -= dampingEqn;
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}
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void Foam::fv::acousticDampingSource::addSup
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(
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const volScalarField& rho,
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fvMatrix<vector>& eqn,
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const label fieldI
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)
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{
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const volVectorField& U = eqn.psi();
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const volScalarField coeff(name_ + ":coeff", w_*frequency_*blendFactor_);
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const volVectorField& URef(mesh().lookupObject<volVectorField>(URefName_));
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fvMatrix<vector> dampingEqn
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(
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fvm::Sp(rho*coeff, U) - rho*coeff*URef
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);
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eqn -= dampingEqn;
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}
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void Foam::fv::acousticDampingSource::addSup
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(
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const volScalarField& alpha,
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const volScalarField& rho,
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fvMatrix<vector>& eqn,
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const label fieldI
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)
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{
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const volVectorField& U = eqn.psi();
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const volScalarField coeff(name_ + ":coeff", w_*frequency_*blendFactor_);
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const volVectorField& URef(mesh().lookupObject<volVectorField>(URefName_));
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fvMatrix<vector> dampingEqn
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(
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fvm::Sp(alpha*rho*coeff, U) - alpha*rho*coeff*URef
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);
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eqn -= dampingEqn;
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}
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bool Foam::fv::acousticDampingSource::read(const dictionary& dict)
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{
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if (cellSetOption::read(dict))
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{
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if (coeffs_.found("UNames"))
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{
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coeffs_.lookup("UNames") >> fieldNames_;
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}
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else if (coeffs_.found("UName"))
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{
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word UName(coeffs_.lookup("UName"));
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fieldNames_ = wordList(1, UName);
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}
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else
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{
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fieldNames_ = wordList(1, "U");
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}
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applied_.setSize(fieldNames_.size(), false);
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coeffs_.lookup("frequency") >> frequency_.value();
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coeffs_.lookup("URef") >> URefName_;
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coeffs_.lookup("centre") >> x0_;
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coeffs_.lookup("radius1") >> r1_;
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coeffs_.lookup("radius2") >> r2_;
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if (coeffs_.readIfPresent("w", w_))
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{
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Info<< name_ << ": Setting stencil width to " << w_ << endl;
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}
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return true;
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}
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else
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{
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return false;
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}
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}
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// ************************************************************************* //
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@ -0,0 +1,184 @@
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/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
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\\ / O peration |
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||||
\\ / A nd | Copyright (C) 2016 OpenCFD Ltd.
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\\/ M anipulation |
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||||
-------------------------------------------------------------------------------
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License
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This file is part of OpenFOAM.
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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
|
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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
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||||
along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
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Class
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Foam::fv::acousticDampingSource
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Group
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grpFvOptionsSources
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Description
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Acoustic damping source
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\heading Source usage
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Example usage:
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\verbatim
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acousticDampingSourceCoeffs
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{
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}
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\endverbatim
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SourceFiles
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acousticDampingSource.C
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\*---------------------------------------------------------------------------*/
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#ifndef acousticDampingSource_H
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#define acousticDampingSource_H
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#include "cellSetOption.H"
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#include "volFields.H"
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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namespace Foam
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{
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class porosityModel;
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namespace fv
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{
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/*---------------------------------------------------------------------------*\
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Class acousticDampingSource Declaration
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\*---------------------------------------------------------------------------*/
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class acousticDampingSource
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:
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public cellSetOption
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{
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protected:
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// Protected data
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//- Frequency [Hz]
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dimensionedScalar frequency_;
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//- Blending factor []
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volScalarField blendFactor_;
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//- Name of reference velocity field
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word URefName_;
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// Sphere centre location or damping
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point x0_;
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// Inner radius at which to start damping
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scalar r1_;
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// Outer radius beyond which damping is applied
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scalar r2_;
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//- Stencil width, default = 20
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label w_;
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// Protected Member Functions
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//- Helper function to set the blending factor
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void setBlendingFactor();
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private:
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// Private Member Functions
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//- Disallow default bitwise copy construct
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acousticDampingSource(const acousticDampingSource&);
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//- Disallow default bitwise assignment
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void operator=(const acousticDampingSource&) = delete;
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public:
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//- Runtime type information
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TypeName("acousticDampingSource");
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// Constructors
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//- Construct from components
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acousticDampingSource
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(
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const word& name,
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const word& modelType,
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const dictionary& dict,
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const fvMesh& mesh
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);
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//- Destructor
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virtual ~acousticDampingSource()
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{}
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// Member Functions
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// Add explicit and implicit contributions
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//- Add implicit contribution to momentum equation
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virtual void addSup
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(
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fvMatrix<vector>& eqn,
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const label fieldI
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);
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//- Add implicit contribution to compressible momentum equation
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virtual void addSup
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(
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const volScalarField& rho,
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fvMatrix<vector>& eqn,
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const label fieldI
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);
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//- Add implicit contribution to phase momentum equation
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virtual void addSup
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(
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const volScalarField& alpha,
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const volScalarField& rho,
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fvMatrix<vector>& eqn,
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const label fieldI
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);
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// IO
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//- Read dictionary
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virtual bool read(const dictionary& dict);
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};
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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} // End namespace fv
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} // End namespace Foam
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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#endif
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// ************************************************************************* //
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