Added electrostaticPotential class.

src/lagrangian/molecularDynamics/potential/Make/files

@@ -39,4 +39,8 @@ $(tetherPotential)/derived/harmonicSpring/harmonicSpring.C
 $(tetherPotential)/derived/restrainedHarmonicSpring/restrainedHarmonicSpring.C
 $(tetherPotential)/derived/pitchForkRing/pitchForkRing.C
 
+electrostaticPotential = electrostaticPotential
+
+$(electrostaticPotential)/electrostaticPotential.C
+
 LIB = $(FOAM_LIBBIN)/libpotential

src/lagrangian/molecularDynamics/potential/electrostaticPotential/electrostaticPotential.C

@@ -0,0 +1,53 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 1991-2008 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 "electrostaticPotential.H"
+#include "mathematicalConstants.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+Foam::electrostaticPotential::electrostaticPotential()
+:
+    prefactor(1.0/(4.0 * mathematicalConstant::pi * 8.854187817e-12))
+{}
+
+// * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * * //
+
+Foam::scalar Foam::electrostaticPotential::energy(const scalar rSqr) const
+{
+    return prefactor/sqrt(rSqr);
+}
+
+
+Foam::scalar Foam::electrostaticPotential::force(const scalar rSqr) const
+{
+    return prefactor/(rSqr);
+}
+
+
+// ************************************************************************* //

src/lagrangian/molecularDynamics/potential/electrostaticPotential/electrostaticPotential.H

@@ -0,0 +1,87 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 1991-2008 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::pairPotentials::electrostaticPotential
+
+Description
+
+
+SourceFiles
+    electrostaticPotential.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef electrostaticPotential_H
+#define electrostaticPotential_H
+
+#include "scalar.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+/*---------------------------------------------------------------------------*\
+                           Class electrostaticPotential Declaration
+\*---------------------------------------------------------------------------*/
+
+class electrostaticPotential
+{
+    // Private data
+
+    scalar prefactor;
+
+
+public:
+
+    // Constructors
+
+        //- Construct and set prefactor
+        electrostaticPotential();
+
+
+    // Destructor
+
+        ~electrostaticPotential()
+        {}
+
+
+    // Member Functions
+
+        scalar energy(const scalar rSqr) const;
+
+        scalar force(const scalar rSqr) const;
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //

src/lagrangian/molecularDynamics/potential/potential/potential.H

@@ -40,6 +40,7 @@ SourceFiles
 #include "IOdictionary.H"
 #include "Time.H"
 #include "pairPotentialList.H"
+#include "electrostaticPotential.H"
 #include "tetherPotentialList.H"
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //