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fvMotionSolverEngineMesh: Corrected handling of the piston and liner velocity

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Changed the motion specification to be point-based rather than cell-based.
Resolves bug report http://www.openfoam.org/mantisbt/view.php?id=766
This commit is contained in:
Henry
2013-03-12 17:00:48 +00:00
parent b2c397d459
commit 52e78fb331
2 changed files with 17 additions and 10 deletions
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9
src/dynamicMesh/motionSolver/componentVelocity/componentVelocityMotionSolver.H
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@ -2,7 +2,7 @@
========= | ========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox \\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | \\ / O peration |
\\ / A nd | Copyright (C) 2012 OpenFOAM Foundation \\ / A nd | Copyright (C) 2012-2013 OpenFOAM Foundation
\\/ M anipulation | \\/ M anipulation |
------------------------------------------------------------------------------- -------------------------------------------------------------------------------
License License
@ -108,6 +108,13 @@ public:
// Member Functions // Member Functions
//- Non-const access to the pointMotionU in order to allow changes
// to the boundary motion
pointScalarField& pointMotionU()
{
return pointMotionU_;
}
//- Update local data for geometry changes //- Update local data for geometry changes
virtual void movePoints(const pointField&); virtual void movePoints(const pointField&);

14
src/engine/engineMesh/fvMotionSolverEngineMesh/fvMotionSolverEngineMesh.C
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@ -2,7 +2,7 @@
========= | ========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox \\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | \\ / O peration |
\\ / A nd | Copyright (C) 2011-2012 OpenFOAM Foundation \\ / A nd | Copyright (C) 2011-2013 OpenFOAM Foundation
\\/ M anipulation | \\/ M anipulation |
------------------------------------------------------------------------------- -------------------------------------------------------------------------------
License License
@ -80,17 +80,18 @@ void Foam::fvMotionSolverEngineMesh::move()
// Position of the top of the static mesh layers above the piston // Position of the top of the static mesh layers above the piston
scalar pistonPlusLayers = pistonPosition_.value() + pistonLayers_.value(); scalar pistonPlusLayers = pistonPosition_.value() + pistonLayers_.value();
motionSolver_.cellMotionU().boundaryField()[pistonIndex_] == deltaZ; scalar pistonSpeed = deltaZ/engineDB_.deltaTValue();
motionSolver_.pointMotionU().boundaryField()[pistonIndex_] == pistonSpeed;
{ {
scalarField linerPoints scalarField linerPoints
( (
motionSolver_.cellMotionU() boundary()[linerIndex_].patch().localPoints().component(vector::Z)
.boundaryField()[linerIndex_].patch().Cf().component(vector::Z)
); );
motionSolver_.cellMotionU().boundaryField()[linerIndex_] == motionSolver_.pointMotionU().boundaryField()[linerIndex_] ==
deltaZ*pos(deckHeight_.value() - linerPoints) pistonSpeed*pos(deckHeight_.value() - linerPoints)
*(deckHeight_.value() - linerPoints) *(deckHeight_.value() - linerPoints)
/(deckHeight_.value() - pistonPlusLayers); /(deckHeight_.value() - pistonPlusLayers);
} }
@ -130,7 +131,6 @@ void Foam::fvMotionSolverEngineMesh::move()
pistonPosition_.value() += deltaZ; pistonPosition_.value() += deltaZ;
scalar pistonSpeed = deltaZ/engineDB_.deltaTValue();
Info<< "clearance: " << deckHeight_.value() - pistonPosition_.value() << nl Info<< "clearance: " << deckHeight_.value() - pistonPosition_.value() << nl
<< "Piston speed = " << pistonSpeed << " m/s" << endl; << "Piston speed = " << pistonSpeed << " m/s" << endl;