Graded normal extrude model

src/mesh/extrudeModel/Make/files

@@ -1,6 +1,7 @@
 extrudeModel/extrudeModel.C
 extrudeModel/newExtrudeModel.C
 linearNormal/linearNormal.C
+gradedNormal/gradedNormal.C
 linearRadial/linearRadial.C
 sigmaRadial/sigmaRadial.C
 wedge/wedge.C

src/mesh/extrudeModel/Make/options

@@ -1,8 +1,10 @@
 EXE_INC = \
     -I$(LIB_SRC)/meshTools/lnInclude \
-    -I$(LIB_SRC)/dynamicMesh/lnInclude
+    -I$(LIB_SRC)/dynamicMesh/lnInclude \
+    -I$(LIB_SRC)/ODE/lnInclude
 
 LIB_LIBS = \
     -lmeshTools \
-    -ldynamicMesh
+    -ldynamicMesh \
+    -lODE
 

src/mesh/extrudeModel/gradedNormal/gradedNormal.C

@@ -0,0 +1,143 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | foam-extend: Open Source CFD
+   \\    /   O peration     | Version:     4.0
+    \\  /    A nd           | Web:         http://www.foam-extend.org
+     \\/     M anipulation  | For copyright notice see file Copyright
+-------------------------------------------------------------------------------
+License
+    This file is part of foam-extend.
+
+    foam-extend 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.
+
+    foam-extend 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 foam-extend.  If not, see <http://www.gnu.org/licenses/>.
+
+\*---------------------------------------------------------------------------*/
+
+#include "gradedNormal.H"
+#include "addToRunTimeSelectionTable.H"
+#include "BisectionRoot.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+namespace extrudeModels
+{
+
+// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
+
+defineTypeNameAndDebug(gradedNormal, 0);
+
+addToRunTimeSelectionTable(extrudeModel, gradedNormal, dictionary);
+
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+gradedNormal::gradedNormal(const dictionary& dict)
+:
+    extrudeModel(typeName, dict),
+    thickness_(readScalar(coeffDict_.lookup("thickness"))),
+    delta0_(readScalar(coeffDict_.lookup("initialCellLength"))),
+    expansionFactor_(1.0)
+{
+    // Sanity checks
+    if (thickness_ <= SMALL)
+    {
+        FatalErrorIn("gradedNormal(const dictionary&)")
+            << "thickness should be positive: " << thickness_
+            << exit(FatalError);
+    }
+
+    if (delta0_ <= SMALL)
+    {
+        FatalErrorIn("gradedNormal(const dictionary&)")
+            << "initialCellLength should be positive: " << delta0_
+            << exit(FatalError);
+    }
+
+    const scalar maxExpFactor =
+        coeffDict_.lookupOrDefault<scalar>("maxExpansionFactor", 3.0);
+
+    if (maxExpFactor <= SMALL)
+    {
+        FatalErrorIn("gradedNormal(const dictionary&)")
+            << "maxExpansionFactor should be positive: " << maxExpFactor
+            << exit(FatalError);
+    }
+
+    const scalar bisectionTol =
+        coeffDict_.lookupOrDefault<scalar>("bisectionTol", 1e-5);
+
+    if (bisectionTol <= SMALL)
+    {
+        FatalErrorIn("gradedNormal(const dictionary&)")
+            << "bisectionTolerance should be positive: " << bisectionTol
+            << exit(FatalError);
+    }
+
+    // Create expansion factor equation represented as a function object
+    expansionFactorEqn eqn(*this);
+
+    // Calculate the expansionFactor using the bisection algorithm with the
+    // default tolerance of 1e-5
+    BisectionRoot<expansionFactorEqn> rootFinder
+    (
+        eqn,
+        bisectionTol
+    );
+
+    // Search for the root in [0, 3], where upper bound 3 is default
+    expansionFactor_ = rootFinder.root
+    (
+        0.0,
+        maxExpFactor
+    );
+
+    // Report the result
+    Info<< "Calculated expansion factor: " << expansionFactor_ << endl;
+}
+
+
+// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
+
+gradedNormal::~gradedNormal()
+{}
+
+
+// * * * * * * * * * * * * * * * * Operators * * * * * * * * * * * * * * * * //
+
+point gradedNormal::operator()
+(
+    const point& surfacePoint,
+    const vector& surfaceNormal,
+    const label layer
+) const
+{
+    scalar d = 0.0;
+
+    for (label i = 0; i < layer; ++i)
+    {
+        d += delta0_*pow(expansionFactor_, i + 1);
+    }
+
+    return surfacePoint + d*surfaceNormal;
+}
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace extrudeModels
+} // End namespace Foam
+
+// ************************************************************************* //
+

src/mesh/extrudeModel/gradedNormal/gradedNormal.H

@@ -0,0 +1,158 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | foam-extend: Open Source CFD
+   \\    /   O peration     | Version:     4.0
+    \\  /    A nd           | Web:         http://www.foam-extend.org
+     \\/     M anipulation  | For copyright notice see file Copyright
+-------------------------------------------------------------------------------
+License
+    This file is part of foam-extend.
+
+    foam-extend 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.
+
+    foam-extend 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 foam-extend.  If not, see <http://www.gnu.org/licenses/>.
+
+Class
+    Foam::extrudeModels::gradedNormal
+
+Description
+    Extrudes by transforming points normal to the surface. Input parameters are:
+    1. Extrusion thickness (in meters),
+    2. Initial delta (in meters),
+    3. Number of layers.
+
+    Expansion factor is calculated numerically using bisection algorithm.
+
+Author
+    Vuko Vukcevic. FMENA Zagreb.  All rights reserved.
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef gradedNormal_H
+#define gradedNormal_H
+
+#include "point.H"
+#include "extrudeModel.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+namespace extrudeModels
+{
+
+/*---------------------------------------------------------------------------*\
+                    Class gradedNormal Declaration
+\*---------------------------------------------------------------------------*/
+
+class gradedNormal
+:
+    public extrudeModel
+{
+    // Private data
+
+        //- Layer thickness
+        scalar thickness_;
+
+        //- Initial delta (cell size at the extruded patch)
+        scalar delta0_;
+
+        //- Expansion factor
+        scalar expansionFactor_;
+
+
+    // Expansion factor equation (functor class used by BisectionRoot)
+    class expansionFactorEqn
+    {
+        // Private data
+
+            //- Const reference to underlying gradedNormal model
+            const gradedNormal& gnm_;
+
+
+    public:
+
+        //- Construct given gradedNormal model
+        explicit expansionFactorEqn(const gradedNormal& gnm)
+        :
+            gnm_(gnm)
+        {}
+
+
+        //- Function call operator
+        scalar operator()(const scalar& x) const
+        {
+            scalar result = gnm_.thickness();
+
+            for (label i = 0; i <= gnm_.nLayers(); ++i)
+            {
+                result -= gnm_.delta0()*pow(x, i);
+            }
+
+            return result;
+        }
+    };
+
+
+public:
+
+    //- Runtime type information
+    TypeName("gradedNormal");
+
+    // Constructors
+
+        //- Construct from components
+        gradedNormal(const dictionary& dict);
+
+
+    //- Destructor
+    ~gradedNormal();
+
+
+    // Access functions
+
+        //- Return const reference to thickness
+        const scalar& thickness() const
+        {
+            return thickness_;
+        }
+
+
+        //- Return const reference to initial delta
+        const scalar& delta0() const
+        {
+            return delta0_;
+        }
+
+
+    // Member Operators
+
+        point operator()
+        (
+            const point& surfacePoint,
+            const vector& surfaceNormal,
+            const label layer
+        ) const;
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace extrudeModels
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //
+