1 /*---------------------------------------------------------------------------*\
3 \\ / F ield | OpenFOAM: The Open Source CFD Toolbox
5 \\ / A nd | Copyright (C) 2008-2010 OpenCFD Ltd.
7 -------------------------------------------------------------------------------
9 This file is part of OpenFOAM.
11 OpenFOAM is free software: you can redistribute it and/or modify it
12 under the terms of the GNU General Public License as published by
13 the Free Software Foundation, either version 3 of the License, or
14 (at your option) any later version.
16 OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
17 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
18 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
21 You should have received a copy of the GNU General Public License
22 along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
24 \*---------------------------------------------------------------------------*/
26 #include "harmonicSpring.H"
27 #include "addToRunTimeSelectionTable.H"
29 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
33 namespace tetherPotentials
36 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
38 defineTypeNameAndDebug(harmonicSpring, 0);
40 addToRunTimeSelectionTable
48 // * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
50 harmonicSpring::harmonicSpring
53 const dictionary& tetherPotentialProperties
56 tetherPotential(name, tetherPotentialProperties),
59 tetherPotentialProperties.subDict(typeName + "Coeffs")
61 springConstant_(readScalar(harmonicSpringCoeffs_.lookup("springConstant")))
65 // * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * * //
67 scalar harmonicSpring::energy(const vector r) const
69 return 0.5*springConstant_*magSqr(r);
73 vector harmonicSpring::force(const vector r) const
75 return -springConstant_*r;
79 bool harmonicSpring::read(const dictionary& tetherPotentialProperties)
81 tetherPotential::read(tetherPotentialProperties);
83 harmonicSpringCoeffs_ =
84 tetherPotentialProperties.subDict(typeName + "Coeffs");
86 harmonicSpringCoeffs_.lookup("springConstant") >> springConstant_;
92 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
94 } // End namespace tetherPotentials
95 } // End namespace Foam
97 // ************************************************************************* //