src/engine/engineTopoChangerMesh/simpleTwoStroke/simpleTwoStroke.C

   1 /*---------------------------------------------------------------------------*\
   2   =========                 |
   3   \\      /  F ield         | foam-extend: Open Source CFD
   4    \\    /   O peration     |
   5     \\  /    A nd           | For copyright notice see file Copyright
   6      \\/     M anipulation  |
   7 -------------------------------------------------------------------------------
   8 License
   9     This file is part of foam-extend.
  10
  11     foam-extend is free software: you can redistribute it and/or modify it
  12     under the terms of the GNU General Public License as published by the
  13     Free Software Foundation, either version 3 of the License, or (at your
  14     option) any later version.
  15
  16     foam-extend is distributed in the hope that it will be useful, but
  17     WITHOUT ANY WARRANTY; without even the implied warranty of
  18     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19     General Public License for more details.
  20
  21     You should have received a copy of the GNU General Public License
  22     along with foam-extend.  If not, see <http://www.gnu.org/licenses/>.
  23
  24 \*---------------------------------------------------------------------------*/
  25
  26 #include "simpleTwoStroke.H"
  27 #include "layerAdditionRemoval.H"
  28 #include "componentMixedTetPolyPatchVectorField.H"
  29 #include "mapPolyMesh.H"
  30 #include "polyTopoChange.H"
  31 #include "addToRunTimeSelectionTable.H"
  32 #include "GeometricField.H"
  33 #include "volMesh.H"
  34 #include "engineTime.H"
  35 #include "pointField.H"
  36 #include "fvPatchField.H"
  37
  38 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
  39
  40 namespace Foam
  41 {
  42     defineTypeNameAndDebug(simpleTwoStroke, 0);
  43     addToRunTimeSelectionTable(engineTopoChangerMesh, simpleTwoStroke, IOobject);
  44 }
  45
  46
  47 // * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
  48
  49
  50
  51
  52 bool Foam::simpleTwoStroke::realDeformation() const
  53 {
  54
  55
  56     if (virtualPistonPosition()+ engTime().pistonDisplacement().value() > deckHeight()-engTime().clearance().value()-SMALL)
  57     {
  58         return true;
  59     }
  60     else
  61     {
  62         return deformation();
  63     }
  64
  65 }
  66
  67 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
  68
  69 // Construct from components
  70 Foam::simpleTwoStroke::simpleTwoStroke
  71 (
  72     const IOobject& io
  73 )
  74 :
  75     engineTopoChangerMesh(io),
  76     piston_(*this, engTime().engineDict().subDict("piston")),
  77     scavInCylPatchName_(engTime().engineDict().lookup("scavInCylPatch")),
  78     scavInPortPatchName_(engTime().engineDict().lookup("scavInPortPatch")),
  79     movingPointsMaskPtr_(NULL),
  80     deformSwitch_(readScalar(engTime().engineDict().lookup("deformAngle"))),
  81     delta_(readScalar(engTime().engineDict().lookup("delta"))),
  82     offSet_(readScalar(engTime().engineDict().lookup("offSet"))),
  83     pistonPosition_(-GREAT),
  84     virtualPistonPosition_(-GREAT),
  85     deckHeight_(GREAT),
  86     csPtr_
  87     (
  88         coordinateSystem::New
  89         (
  90             "coordinateSystem",
  91             engTime().engineDict().subDict("coordinateSystem")
  92         )
  93     ),
  94     foundScavPorts_
  95     (
  96         boundaryMesh().findPatchID(scavInCylPatchName_) != -1
  97         &&
  98         boundaryMesh().findPatchID(scavInPortPatchName_) != -1
  99     ),
 100     scavPortsTol_(readScalar(engTime().engineDict().lookup("scavPortsTol")))
 101 {
 102     // Add zones and modifiers if not already there.
 103     addZonesAndModifiers();
 104 }
 105
 106
 107 // * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
 108
 109
 110 // * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 111
 112
 113 void Foam::simpleTwoStroke::setBoundaryVelocity(volVectorField& U)
 114 {
 115     vector pistonVel = piston().cs().axis()*engTime().pistonSpeed().value();
 116
 117     // On the piston movingWallVelocity is used. There is no need to update
 118     // the piston velocity
 119
 120 //    U.boundaryField()[piston().patchID().index()] = pistonVel;
 121
 122     Info << "setting the boundary velocity" << endl;
 123     U.boundaryField()[boundaryMesh().findPatchID(scavInPortPatchName_)] ==
 124         pistonVel;
 125
 126 }
 127
 128 bool Foam::simpleTwoStroke::portsOpened() const
 129 {
 130
 131     scalar maxScavPortsZ = max
 132        (
 133            boundary()
 134            [
 135                boundaryMesh().findPatchID(scavInPortPatchName_)
 136            ].patch().localPoints()
 137        ).z();
 138
 139
 140     scalar minLinerZ = min
 141        (
 142            boundary()
 143            [
 144                boundaryMesh().findPatchID(scavInCylPatchName_)
 145            ].patch().localPoints()
 146        ).z();
 147
 148
 149     if (maxScavPortsZ - scavPortsTol_ < minLinerZ)
 150     {
 151         return false;
 152     }
 153     else
 154     {
 155         return true;
 156     }
 157 }
 158
 159
 160 // ************************************************************************* //