Initial commit for version 2.0.x patch release
[OpenFOAM-2.0.x.git] / src / lagrangian / molecularDynamics / potential / pairPotential / derived / maitlandSmith / maitlandSmith.C
blob51cc941b777b55662e1724f6d54ac1f81e3b8125
1 /*---------------------------------------------------------------------------*\
2   =========                 |
3   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
4    \\    /   O peration     |
5     \\  /    A nd           | Copyright (C) 2008-2010 OpenCFD Ltd.
6      \\/     M anipulation  |
7 -------------------------------------------------------------------------------
8 License
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
19     for more details.
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 "maitlandSmith.H"
27 #include "addToRunTimeSelectionTable.H"
29 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
31 namespace Foam
33 namespace pairPotentials
36 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
38 defineTypeNameAndDebug(maitlandSmith, 0);
40 addToRunTimeSelectionTable
42     pairPotential,
43     maitlandSmith,
44     dictionary
48 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
50 maitlandSmith::maitlandSmith
52     const word& name,
53     const dictionary& maitlandSmith
56     pairPotential(name, maitlandSmith),
57     maitlandSmithCoeffs_(maitlandSmith.subDict(typeName + "Coeffs")),
58     m_(readScalar(maitlandSmithCoeffs_.lookup("m"))),
59     gamma_(readScalar(maitlandSmithCoeffs_.lookup("gamma"))),
60     rm_(readScalar(maitlandSmithCoeffs_.lookup("rm"))),
61     epsilon_(readScalar(maitlandSmithCoeffs_.lookup("epsilon")))
63     setLookupTables();
67 // * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * * //
69 scalar maitlandSmith::unscaledEnergy(const scalar r) const
71     scalar nr = (m_ + gamma_*(r/rm_ - 1.0));
73     return epsilon_
74        *(
75             (6.0 / (nr - 6.0))*Foam::pow(r/rm_, -nr)
76           - (nr / (nr - 6.0))*Foam::pow(r/rm_, -6)
77         );
81 bool maitlandSmith::read(const dictionary& maitlandSmith)
83     pairPotential::read(maitlandSmith);
85     maitlandSmithCoeffs_ = maitlandSmith.subDict(typeName + "Coeffs");
87     maitlandSmithCoeffs_.lookup("m") >> m_;
88     maitlandSmithCoeffs_.lookup("gamma") >> gamma_;
89     maitlandSmithCoeffs_.lookup("rm") >> rm_;
90     maitlandSmithCoeffs_.lookup("epsilon") >> epsilon_;
92     return true;
96 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
98 } // End namespace pairPotentials
99 } // End namespace Foam
101 // ************************************************************************* //