JohnsonJacksonSchaefferFrictionalStress.C
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25 
26 #include "JohnsonJacksonSchaefferFrictionalStress.H"
28 #include "mathematicalConstants.H"
29 
30 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
31 
32 namespace Foam
33 {
34 namespace kineticTheoryModels
35 {
36 namespace frictionalStressModels
37 {
38  defineTypeNameAndDebug(JohnsonJacksonSchaeffer, 0);
39 
41  (
42  frictionalStressModel,
43  JohnsonJacksonSchaeffer,
44  dictionary
45  );
46 }
47 }
48 }
49 
50 
51 // * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
52 
55 (
56  const dictionary& dict
57 )
58 :
59  frictionalStressModel(dict),
60  coeffDict_(dict.optionalSubDict(typeName + "Coeffs")),
61  Fr_("Fr", dimensionSet(1, -1, -2, 0, 0), coeffDict_),
62  eta_("eta", dimless, coeffDict_),
63  p_("p", dimless, coeffDict_),
64  phi_("phi", dimless, coeffDict_),
65  alphaDeltaMin_("alphaDeltaMin", dimless, coeffDict_)
66 {
67  phi_ *= constant::mathematical::pi/180.0;
68 }
69 
70 
71 // * * * * * * * * * * * * * * * * Destructor * * * * * * * * * * * * * * * //
72 
75 {}
76 
77 
78 // * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
79 
83 (
84  const phaseModel& phase,
85  const dimensionedScalar& alphaMinFriction,
86  const dimensionedScalar& alphaMax
87 ) const
88 {
89  const volScalarField& alpha = phase;
90 
91  return
92  Fr_*pow(max(alpha - alphaMinFriction, scalar(0)), eta_)
93  /pow(max(alphaMax - alpha, alphaDeltaMin_), p_);
94 }
95 
96 
100 (
101  const phaseModel& phase,
102  const dimensionedScalar& alphaMinFriction,
103  const dimensionedScalar& alphaMax
104 ) const
105 {
106  const volScalarField& alpha = phase;
107 
108  return Fr_*
109  (
110  eta_*pow(max(alpha - alphaMinFriction, scalar(0)), eta_ - 1.0)
111  *(alphaMax-alpha)
112  + p_*pow(max(alpha - alphaMinFriction, scalar(0)), eta_)
113  )/pow(max(alphaMax - alpha, alphaDeltaMin_), p_ + 1.0);
114 }
115 
116 
120 (
121  const phaseModel& phase,
122  const dimensionedScalar& alphaMinFriction,
123  const dimensionedScalar& alphaMax,
124  const volScalarField& pf,
125  const volSymmTensorField& D
126 ) const
127 {
128  const volScalarField& alpha = phase;
129 
130  tmp<volScalarField> tnu
131  (
132  new volScalarField
133  (
134  IOobject
135  (
136  "JohnsonJacksonSchaeffer:nu",
137  phase.mesh().time().timeName(),
138  phase.mesh(),
141  false
142  ),
143  phase.mesh(),
144  dimensionedScalar("nu", dimensionSet(0, 2, -1, 0, 0), 0.0)
145  )
146  );
147 
148  volScalarField& nuf = tnu.ref();
149 
150  forAll(D, celli)
151  {
152  if (alpha[celli] > alphaMinFriction.value())
153  {
154  nuf[celli] =
155  0.5*pf[celli]*sin(phi_.value())
156  /(
157  sqrt((1.0/3.0)*sqr(tr(D[celli])) - invariantII(D[celli]))
158  + small
159  );
160  }
161  }
162 
163  const fvPatchList& patches = phase.mesh().boundary();
164  const volVectorField& U = phase.U();
165 
166  volScalarField::Boundary& nufBf = nuf.boundaryFieldRef();
167 
168  forAll(patches, patchi)
169  {
170  if (!patches[patchi].coupled())
171  {
172  nufBf[patchi] =
173  (
174  pf.boundaryField()[patchi]*sin(phi_.value())
175  /(
176  mag(U.boundaryField()[patchi].snGrad())
177  + small
178  )
179  );
180  }
181  }
182 
183  // Correct coupled BCs
184  nuf.correctBoundaryConditions();
185 
186  return tnu;
187 }
188 
189 
192 {
193  coeffDict_ <<= dict_.optionalSubDict(typeName + "Coeffs");
194 
195  Fr_.read(coeffDict_);
196  eta_.read(coeffDict_);
197  p_.read(coeffDict_);
198 
199  phi_.read(coeffDict_);
200  phi_ *= constant::mathematical::pi/180.0;
201 
202  alphaDeltaMin_.read(coeffDict_);
203 
204  return true;
205 }
206 
207 
208 // ************************************************************************* //
Cmpt invariantII(const SymmTensor< Cmpt > &st)
Return the 2nd invariant of a symmetric tensor.
Definition: SymmTensorI.H:403
GeometricField< symmTensor, fvPatchField, volMesh > volSymmTensorField
Definition: volFieldsFwd.H:58
dictionary dict
virtual tmp< volScalarField > nu(const phaseModel &phase, const dimensionedScalar &alphaMinFriction, const dimensionedScalar &alphaMax, const volScalarField &pf, const volSymmTensorField &D) const
#define forAll(list, i)
Loop across all elements in list.
Definition: UList.H:428
dimensioned< Type > max(const dimensioned< Type > &, const dimensioned< Type > &)
dimensionedSymmTensor sqr(const dimensionedVector &dv)
dimensionedScalar sqrt(const dimensionedScalar &ds)
GeometricField< vector, fvPatchField, volMesh > volVectorField
Definition: volFieldsFwd.H:55
Macros for easy insertion into run-time selection tables.
GeometricField< scalar, fvPatchField, volMesh > volScalarField
Definition: volFieldsFwd.H:52
virtual tmp< volScalarField > frictionalPressurePrime(const phaseModel &phase, const dimensionedScalar &alphaMinFriction, const dimensionedScalar &alphaMax) const
void read(const dictionary &)
Update the value of dimensioned<Type>
const dictionary & optionalSubDict(const word &) const
Find and return a sub-dictionary if found.
Definition: dictionary.C:759
const Type & value() const
Return const reference to value.
dimensionedScalar tr(const dimensionedSphericalTensor &dt)
dimensionedScalar sin(const dimensionedScalar &ds)
addToRunTimeSelectionTable(ensightPart, ensightPartCells, istream)
defineTypeNameAndDebug(combustionModel, 0)
Internal & ref()
Return a reference to the dimensioned internal field.
dimensionedScalar pow(const dimensionedScalar &ds, const dimensionedScalar &expt)
PtrList< fvPatch > fvPatchList
container classes for fvPatch
Definition: fvPatchList.H:45
label patchi
const dimensionSet dimless(0, 0, 0, 0, 0, 0, 0)
Definition: dimensionSets.H:47
const dictionary & dict_
Reference to higher-level dictionary for re-read.
Boundary & boundaryFieldRef()
Return a reference to the boundary field.
dimensioned< scalar > dimensionedScalar
Dimensioned scalar obtained from generic dimensioned type.
dimensioned< scalar > mag(const dimensioned< Type > &)
A class for managing temporary objects.
Definition: PtrList.H:53
const dimensionedScalar alpha
Fine-structure constant: default SI units: [].
JohnsonJacksonSchaeffer(const dictionary &dict)
Construct from components.
Namespace for OpenFOAM.
virtual tmp< volScalarField > frictionalPressure(const phaseModel &phase, const dimensionedScalar &alphaMinFriction, const dimensionedScalar &alphaMax) const