harmonicSpring.C
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25 
26 #include "harmonicSpring.H"
28 
29 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
30 
31 namespace Foam
32 {
33 namespace tetherPotentials
34 {
35 
36 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
37 
39 
41 (
45 );
46 
47 
48 // * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
49 
51 (
52  const word& name,
53  const dictionary& tetherPotentialProperties
54 )
55 :
56  tetherPotential(name, tetherPotentialProperties),
57  harmonicSpringCoeffs_
58  (
59  tetherPotentialProperties.subDict(typeName + "Coeffs")
60  ),
61  springConstant_(readScalar(harmonicSpringCoeffs_.lookup("springConstant")))
62 {}
63 
64 
65 // * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * * //
66 
67 scalar harmonicSpring::energy(const vector r) const
68 {
69  return 0.5*springConstant_*magSqr(r);
70 }
71 
72 
74 {
75  return -springConstant_*r;
76 }
77 
78 
79 bool harmonicSpring::read(const dictionary& tetherPotentialProperties)
80 {
81  tetherPotential::read(tetherPotentialProperties);
82 
83  harmonicSpringCoeffs_ =
84  tetherPotentialProperties.subDict(typeName + "Coeffs");
85 
86  harmonicSpringCoeffs_.lookup("springConstant") >> springConstant_;
87 
88  return true;
89 }
90 
91 
92 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
93 
94 } // End namespace tetherPotentials
95 } // End namespace Foam
96 
97 // ************************************************************************* //
A list of keyword definitions, which are a keyword followed by any number of values (e...
Definition: dictionary.H:137
vector force(const vector r) const
const dictionary & subDict(const word &) const
Find and return a sub-dictionary.
Definition: dictionary.C:633
Macros for easy insertion into run-time selection tables.
bool read(const dictionary &tetherPotentialProperties)
Read dictionary.
virtual bool read(const dictionary &tetherPotentialProperties)=0
Read tetherPotential dictionary.
A class for handling words, derived from string.
Definition: word.H:59
bool readScalar(const char *buf, doubleScalar &s)
Read whole of buf as a scalar. Return true if succesful.
Definition: doubleScalar.H:63
defineTypeNameAndDebug(harmonicSpring, 0)
dimensioned< scalar > magSqr(const dimensioned< Type > &)
addToRunTimeSelectionTable(tetherPotential, harmonicSpring, dictionary)
harmonicSpring(const word &name, const dictionary &tetherPotentialProperties)
Construct from components.
Namespace for OpenFOAM.
scalar energy(const vector r) const
ITstream & lookup(const word &, bool recursive=false, bool patternMatch=true) const
Find and return an entry data stream.
Definition: dictionary.C:451