Creation of OpenFOAM-dev repository 15/04/2008

src/randomProcesses/Kmesh/Kmesh.C

@@ -0,0 +1,115 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 1991-2007 OpenCFD Ltd.
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    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 2 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
+    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 OpenFOAM; if not, write to the Free Software Foundation,
+    Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+
+\*---------------------------------------------------------------------------*/
+
+#include "Kmesh.H"
+#include "polyMesh.H"
+#include "volFields.H"
+#include "mathematicalConstants.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+inline label rep
+(
+    const label i,
+    const label j,
+    const label k,
+    const labelList& nn
+)
+{
+    return (k + j*nn[2] + i*nn[1]*nn[2]);
+}
+
+
+// from fvMesh
+Kmesh::Kmesh(const fvMesh& mesh)
+:
+    vectorField(mesh.V().size()),
+    NN(vector::dim)
+{
+    const scalar pi = mathematicalConstant::pi;
+    const scalar twoPi = 2.0*pi;
+
+    boundBox box = mesh.bounds();
+    L = box.max() - box.min();
+
+    vector cornerCellCentre = ::Foam::max(mesh.C().internalField());
+    vector cellL = 2*(box.max() - cornerCellCentre);
+
+    vector rdeltaByL;
+    label nTot = 1;
+
+    label i;
+    forAll(NN, i)
+    {
+        NN[i] = label(L[i]/cellL[i] + 0.5);
+        nTot *= NN[i];
+
+        if (NN[i] > 1)
+        {
+            L[i] -= cellL[i];
+        }
+
+        rdeltaByL[i] = NN[i]/(L[i]*L[i]);
+    }
+
+    if (nTot != mesh.nCells())
+    {
+        FatalErrorIn("Kmesh::Kmesh(const fvMesh& mesh)")
+            << "calculated number of cells is incorrect"
+            << abort(FatalError);
+    }
+
+    for (i=0; i<NN[0]; i++)
+    {
+        scalar k1 = (i - NN[0]/2)*twoPi/L[0];
+
+        for (label j=0; j<NN[1]; j++)
+        {
+            scalar k2 = (j - NN[1]/2)*twoPi/L[1];
+
+            for (label k=0; k<NN[2]; k++)
+            {
+                scalar k3 = (k - NN[2]/2)*twoPi/L[2];
+
+                (*this)[rep(i, j, k, NN)] = vector(k1, k2, k3);
+            }
+        }
+    }
+
+    Kmax = mag((*this)[rep(NN[0]-1, NN[1]-1, NN[2]-1, NN)]);
+}
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+
+// ************************************************************************* //

src/randomProcesses/Kmesh/Kmesh.H

@@ -0,0 +1,104 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 1991-2007 OpenCFD Ltd.
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    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 2 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
+    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 OpenFOAM; if not, write to the Free Software Foundation,
+    Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+
+Class
+    Foam::Kmesh
+
+Description
+    Calculate the wavenumber vector field corresponding to the
+    space vector field of a finite volume mesh;
+
+SourceFiles
+    Kmesh.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef Kmesh_H
+#define Kmesh_H
+
+#include "fvMesh.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+/*---------------------------------------------------------------------------*\
+                           Class Kmesh Declaration
+\*---------------------------------------------------------------------------*/
+
+class Kmesh
+:
+    public vectorField
+{
+
+    // Private data
+
+        //- Dimensions of box
+        vector L;
+
+        //- Multi-dimensional addressing array
+        labelList NN;
+
+        //- Maximum wavenumber
+        scalar Kmax;
+
+public:
+
+    // Constructors
+
+        //- Construct from fvMesh
+        Kmesh(const fvMesh&);
+
+
+    // Member Functions
+
+        // Access
+
+        const vector& sizeOfBox() const
+        {
+            return L;
+        }
+
+        const labelList& nn() const
+        {
+            return NN;
+        }
+
+        scalar max() const
+        {
+            return Kmax;
+        }
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //