446 lines
13 KiB
C++
446 lines
13 KiB
C++
/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | foam-extend: Open Source CFD
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\\ / O peration | Version: 4.1
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\\ / A nd | Web: http://www.foam-extend.org
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\\/ M anipulation | For copyright notice see file Copyright
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-------------------------------------------------------------------------------
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License
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This file is part of foam-extend.
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foam-extend 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 the
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Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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foam-extend is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License 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 foam-extend. If not, see <http://www.gnu.org/licenses/>.
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Description
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\*---------------------------------------------------------------------------*/
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#include "contactPatchPair.H"
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#include "contactProblem.H"
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#include "surfaceFields.H"
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// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
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// Construct from components
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Foam::contactPatchPair::contactPatchPair
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(
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const word& name,
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const contactProblem& cp,
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const word& masterPatchName,
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const word& slavePatchName,
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const dimensionedScalar& frictionCoeff,
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const scalar contactTol,
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const intersection::algorithm alg,
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const intersection::direction dir
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)
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:
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name_(name),
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cp_(cp),
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masterPatch_(masterPatchName, cp.mesh().boundaryMesh()),
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slavePatch_(slavePatchName, cp.mesh().boundaryMesh()),
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frictionCoeff_(frictionCoeff),
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contactTol_(contactTol),
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masterInterpolate_
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(
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cp.mesh().boundaryMesh()[masterPatch_.index()]
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),
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slaveInterpolate_
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(
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cp.mesh().boundaryMesh()[slavePatch_.index()]
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),
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masterToSlaveInterpolate_
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(
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cp.mesh().boundaryMesh()[masterPatch_.index()], // from patch
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cp.mesh().boundaryMesh()[slavePatch_.index()], // to patch
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alg,
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dir
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),
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slaveToMasterInterpolate_
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(
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cp.mesh().boundaryMesh()[slavePatch_.index()], // from patch
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cp.mesh().boundaryMesh()[masterPatch_.index()], // to patch
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alg,
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dir
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)
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{}
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// Construct from dictionary
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Foam::contactPatchPair::contactPatchPair
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(
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const word& name,
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const contactProblem& cp,
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const dictionary& dict
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)
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:
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name_(name),
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cp_(cp),
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masterPatch_(dict.lookup("masterPatch"), cp.mesh().boundaryMesh()),
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slavePatch_(dict.lookup("slavePatch"), cp.mesh().boundaryMesh()),
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frictionCoeff_(dict.lookup("frictionCoeff")),
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contactTol_(readScalar(dict.lookup("contactTol"))),
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masterInterpolate_
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(
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cp.mesh().boundaryMesh()[masterPatch_.index()]
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),
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slaveInterpolate_
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(
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cp.mesh().boundaryMesh()[slavePatch_.index()]
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),
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masterToSlaveInterpolate_
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(
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cp.mesh().boundaryMesh()[masterPatch_.index()], // from patch
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cp.mesh().boundaryMesh()[slavePatch_.index()], // to patch
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intersection::algorithmNames_.read(dict.lookup("projectionAlgo")),
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intersection::directionNames_.read(dict.lookup("projectionDir"))
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),
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slaveToMasterInterpolate_
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(
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cp.mesh().boundaryMesh()[slavePatch_.index()], // from patch
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cp.mesh().boundaryMesh()[masterPatch_.index()], // to patch
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intersection::algorithmNames_.read(dict.lookup("projectionAlgo")),
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intersection::directionNames_.read(dict.lookup("projectionDir"))
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)
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{}
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// * * * * * * * * * * * * * * * * Destructor * * * * * * * * * * * * * * * //
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// * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
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Foam::tmp<Foam::scalarField>
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Foam::contactPatchPair::masterTouchFraction() const
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{
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// Get reference to displacement field and mesh
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const volVectorField& U = cp_.U();
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const fvMesh& mesh = cp_.mesh();
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// Interpolate slave displacement into master vertices
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vectorField masterVertexU =
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slaveToMasterInterpolate_.pointInterpolate<vector>
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(
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slaveInterpolate_.faceToPointInterpolate
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(
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U.boundaryField()[slavePatch_.index()]
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)
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);
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const vectorField& projectionDir =
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mesh.boundaryMesh()[masterPatch_.index()].pointNormals();
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// Calculate master gap function
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scalarField vertexMasterGap =
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(
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(
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masterVertexU
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- masterInterpolate_.faceToPointInterpolate
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(
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U.boundaryField()[masterPatch_.index()]
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)
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)
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& projectionDir
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) + slaveToMasterInterpolate_.pointDistanceToIntersection() - contactTol_;
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// Calculate area in contact
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const faceList& masterPatchLocalFaces =
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mesh.boundaryMesh()[masterPatch_.index()].localFaces();
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const pointField& masterPatchLocalPoints =
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mesh.boundaryMesh()[masterPatch_.index()].localPoints();
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tmp<scalarField> ttouchFrac
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(
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new scalarField(masterPatchLocalFaces.size(), 0)
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);
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scalarField& touchFrac = ttouchFrac();
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forAll (masterPatchLocalFaces, faceI)
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{
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touchFrac[faceI] =
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masterPatchLocalFaces[faceI].areaInContact
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(
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masterPatchLocalPoints,
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vertexMasterGap
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);
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}
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return ttouchFrac;
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}
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Foam::tmp<Foam::scalarField>
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Foam::contactPatchPair::slaveTouchFraction() const
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{
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// Get reference to displacement field and mesh
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const volVectorField& U = cp_.U();
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const fvMesh& mesh = cp_.mesh();
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// Interpolate master displacement into slave vertices
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vectorField slaveVertexU =
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masterToSlaveInterpolate_.pointInterpolate<vector>
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(
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masterInterpolate_.faceToPointInterpolate
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(
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U.boundaryField()[masterPatch_.index()]
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)
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);
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const vectorField& projectionDir =
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mesh.boundaryMesh()[slavePatch_.index()].pointNormals();
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// Calculate slave gap function
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scalarField vertexSlaveGap =
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(
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(
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slaveVertexU
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- slaveInterpolate_.faceToPointInterpolate
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(
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U.boundaryField()[slavePatch_.index()]
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)
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)
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& projectionDir
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) + masterToSlaveInterpolate_.pointDistanceToIntersection() - contactTol_;
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// Calculate area in contact
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const faceList& slavePatchLocalFaces =
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mesh.boundaryMesh()[slavePatch_.index()].localFaces();
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const pointField& slavePatchLocalPoints =
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mesh.boundaryMesh()[slavePatch_.index()].localPoints();
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tmp<scalarField> ttouchFrac
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(
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new scalarField(slavePatchLocalFaces.size(), 0)
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);
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scalarField& touchFrac = ttouchFrac();
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forAll (slavePatchLocalFaces, faceI)
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{
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touchFrac[faceI] =
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slavePatchLocalFaces[faceI].areaInContact
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(
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slavePatchLocalPoints,
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vertexSlaveGap
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);
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}
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return ttouchFrac;
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}
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void Foam::contactPatchPair::correct
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(
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const FieldField<Field, vector>& curTraction,
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FieldField<Field, vector>& newTraction,
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FieldField<Field, vector>& refValue,
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FieldField<Field, scalar>& valueFraction
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)
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{
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// Get reference to displacement field and mesh
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const volVectorField::GeometricBoundaryField& Upatches =
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cp_.U().boundaryField();
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const fvMesh& mesh = cp_.mesh();
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const surfaceVectorField::GeometricBoundaryField& Apatches =
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mesh.Sf().boundaryField();
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const surfaceScalarField::GeometricBoundaryField& magApatches =
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mesh.magSf().boundaryField();
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// Get patch indices
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const label masterIndex = masterPatch_.index();
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const label slaveIndex = slavePatch_.index();
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// Calculate patch normals
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vectorField nMasterPatch = Apatches[masterIndex]/magApatches[masterIndex];
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vectorField nSlavePatch = Apatches[slaveIndex]/magApatches[slaveIndex];
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// Calculate slave pressure and tangential force
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scalarField slavePressure = -( nSlavePatch & curTraction[slaveIndex]);
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// Enforce gradient condition on the master patch
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// Calculate relative tangential velocity for master patch
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vectorField relUmaster =
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slaveToMasterInterpolate_.faceInterpolate<vector>
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(
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Upatches[slaveIndex]
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)
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- Upatches[masterIndex];
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relUmaster -= nMasterPatch*(nMasterPatch & relUmaster);
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relUmaster /= mag(relUmaster) + VSMALL;
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// Calculate tangential master traction
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scalarField magMasterTangential =
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Foam::mag((I - nMasterPatch*nMasterPatch) & curTraction[masterIndex]);
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// Calculate master pressure
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scalarField masterPressure =
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max
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(
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slaveToMasterInterpolate_.faceInterpolate<scalar>
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(
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slavePressure
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),
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scalar(0)
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);
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// Calculate master traction, using the positive part of
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// slave pressure and tangential fricton
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// Mind the signs: pressure = negative gradient (minus master normal)
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// friction = positive pressure
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newTraction[masterIndex] +=
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masterTouchFraction()*
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(
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-nMasterPatch*masterPressure
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+ relUmaster*
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min
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(
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frictionCoeff_.value()*masterPressure,
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magMasterTangential
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)
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);
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// Enforce direction mixed condition on the slave patch
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// Calculate slave fraction. Correct for negative pressure
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// (if the pressure is negative, the contact is released)
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//HJ, fiddle pos pressure!!!
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scalarField slaveFrac = slaveTouchFraction();
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// Calculate slave displacement
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vectorField slaveVertexU =
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masterToSlaveInterpolate_.pointInterpolate<vector>
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(
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masterInterpolate_.faceToPointInterpolate
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(
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Upatches[masterIndex]
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)
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);
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const vectorField& projectionDir =
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mesh.boundaryMesh()[slaveIndex].pointNormals();
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// Calculate slave displacement
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vectorField slaveDisp =
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slaveInterpolate_.pointToFaceInterpolate
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(
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slaveVertexU
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+ masterToSlaveInterpolate_.pointDistanceToIntersection()
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*projectionDir
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);
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// Accumulate normal of slave displacement
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refValue[slaveIndex] +=
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nSlavePatch*
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min
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(
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pos(slaveFrac)*
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(
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(nSlavePatch & Upatches[slaveIndex])
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+ slaveFrac*contactTol_
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),
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(nSlavePatch & slaveDisp)
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);
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// Accumulate slave friction
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// Calculate relative tangential velocity for slave patch
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vectorField relUslave =
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masterToSlaveInterpolate_.faceInterpolate<vector>
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(
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Upatches[masterIndex]
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)
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- Upatches[slaveIndex];
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relUslave -= nSlavePatch*(nSlavePatch & relUslave);
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relUslave /= mag(relUslave) + VSMALL;
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// Take out normal component out of slave traction and find the
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// magnitude of the tangential traction.
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scalarField magSlaveTangential =
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Foam::mag((I - nSlavePatch*nSlavePatch) & curTraction[slaveIndex]);
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// Calculate slave traction
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newTraction[slaveIndex] +=
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slaveFrac*relUslave*
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min
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(
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frictionCoeff_.value()*max(slavePressure, scalar(0)),
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magSlaveTangential
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);
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// Accumulate slave touch fraction
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valueFraction[slaveIndex] += slaveFrac;
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/*
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Info << "slavePressure: " << slavePressure << nl
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<< "slaveTouchFrac: " << slaveTouchFraction() << nl
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// << "slaveFrac: " << slaveFrac << nl
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<< "refValueSlave: " << refValue[slaveIndex].component(vector::Y) << nl
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// << "slaveTraction: " << newTraction[slaveIndex] << nl
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<< "masterTouchFrac: " << masterTouchFraction() << nl
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// << "interpolated slave pressure: "
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// << slaveToMasterInterpolate_.faceInterpolate<scalar>
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// (
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// slavePressure
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// )
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// << nl
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// << "masterTraction: "
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// << newTraction[masterIndex].component(vector::Y)
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<< endl;
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*/
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}
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void Foam::contactPatchPair::writeDict(Ostream& os) const
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{
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os << nl << name() << nl << token::BEGIN_BLOCK;
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os << "masterPatch " << masterPatch_.name() << token::END_STATEMENT << nl
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<< "slavePatch " << slavePatch_.name() << token::END_STATEMENT << nl
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<< "frictionCoeff " << frictionCoeff_ << token::END_STATEMENT << nl
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<< "contactTol " << contactTol_ << token::END_STATEMENT << nl
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<< "projectionAlgo "
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<< intersection::algorithmNames_
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[masterToSlaveInterpolate_.projectionAlgo()]
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<< token::END_STATEMENT << nl
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<< "projectionDir "
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<< intersection::directionNames_
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[masterToSlaveInterpolate_.projectionDir()]
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<< token::END_STATEMENT << nl
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<< token::END_BLOCK << endl;
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}
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// * * * * * * * * * * * * * * * Member Operators * * * * * * * * * * * * * //
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// * * * * * * * * * * * * * * * Friend Functions * * * * * * * * * * * * * //
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// * * * * * * * * * * * * * * * Friend Operators * * * * * * * * * * * * * //
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// ************************************************************************* //
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