LehrMilliesMewesCoalescence.C
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29 
30 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
31 
32 namespace Foam
33 {
34 namespace diameterModels
35 {
36 namespace coalescenceModels
37 {
40  (
44  );
45 }
46 }
47 }
48 
50 
51 // * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
52 
55 (
56  const populationBalanceModel& popBal,
57  const dictionary& dict
58 )
59 :
60  coalescenceModel(popBal, dict),
61  uCrit_
62  (
63  dimensionedScalar::lookupOrDefault("uCrit", dict, dimVelocity, 0.08)
64  ),
65  alphaMax_
66  (
67  dimensionedScalar::lookupOrDefault("alphaMax", dict, dimless, 0.6)
68  )
69 {}
70 
71 
72 // * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
73 
74 void
77 (
78  volScalarField& coalescenceRate,
79  const label i,
80  const label j
81 )
82 {
83  const sizeGroup& fi = popBal_.sizeGroups()[i];
84  const sizeGroup& fj = popBal_.sizeGroups()[j];
85 
86  const volScalarField uChar
87  (
88  max
89  (
90  sqrt(2.0)*cbrt(popBal_.continuousTurbulence().epsilon())
91  *sqrt(cbrt(sqr(fi.dSph())) + cbrt(sqr(fj.dSph()))),
92  mag(fi.phase().U() - fj.phase().U())
93  )
94  );
95 
96  coalescenceRate +=
97  pi/4*sqr(fi.dSph() + fj.dSph())*min(uChar, uCrit_)
98  *exp
99  (
100  - sqr(cbrt(alphaMax_)
101  /cbrt(max(popBal_.alphas(), fi.phase().residualAlpha())) - 1)
102  );
103 }
104 
105 
106 // ************************************************************************* //
Macros for easy insertion into run-time selection tables.
Generic GeometricField class.
Base class for coalescence models.
Model of Lehr et al. (2002). The coalescence rate is calculated by.
virtual void addToCoalescenceRate(volScalarField &coalescenceRate, const label i, const label j)
Add to coalescenceRate.
LehrMilliesMewesCoalescence(const populationBalanceModel &popBal, const dictionary &dict)
Model for tracking the evolution of a dispersed phase size distribution due to coalescence (synonymou...
Single size class fraction field representing a fixed particle volume as defined by the user through ...
Definition: sizeGroup.H:102
const dimensionedScalar & dSph() const
Return representative spherical diameter of the sizeGroup.
Definition: sizeGroupI.H:51
const phaseModel & phase() const
Return const-reference to the phase.
Definition: sizeGroupI.H:37
A list of keyword definitions, which are a keyword followed by any number of values (e....
Definition: dictionary.H:162
const dimensionedScalar & residualAlpha() const
Return the residual phase-fraction for given phase.
Definition: phaseModel.C:169
virtual tmp< volVectorField > U() const =0
Return the velocity.
addToRunTimeSelectionTable(coalescenceModel, AdachiStuartFokkink, dictionary)
defineTypeNameAndDebug(AdachiStuartFokkink, 0)
Namespace for OpenFOAM.
dimensionedScalar exp(const dimensionedScalar &ds)
intWM_LABEL_SIZE_t label
A label is an int32_t or int64_t as specified by the pre-processor macro WM_LABEL_SIZE.
Definition: label.H:59
dimensionedSymmTensor sqr(const dimensionedVector &dv)
const dimensionSet dimless
layerAndWeight min(const layerAndWeight &a, const layerAndWeight &b)
dimensionedScalar sqrt(const dimensionedScalar &ds)
dimensioned< scalar > mag(const dimensioned< Type > &)
layerAndWeight max(const layerAndWeight &a, const layerAndWeight &b)
const dimensionSet dimVelocity
dimensionedScalar cbrt(const dimensionedScalar &ds)
dictionary dict