FreeFOAM The Cross-Platform CFD Toolkit
threePhaseInterfaceProperties.H
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24 
25 Class
26  threePhaseInterfaceProperties
27 
28 Description
29  Properties to aid interFoam :
30  1. Correct the alpha boundary condition for dynamic contact angle.
31  2. Calculate interface curvature.
32 
33 SourceFiles
34  threePhaseInterfaceProperties.C
35 
36 \*---------------------------------------------------------------------------*/
37 
38 #ifndef threePhaseInterfaceProperties_H
39 #define threePhaseInterfaceProperties_H
40 
43 
44 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
45 
46 namespace Foam
47 {
48 
49 /*---------------------------------------------------------------------------*\
50  Class threePhaseInterfaceProperties Declaration
51 \*---------------------------------------------------------------------------*/
52 
54 {
55  // Private data
56 
57  const threePhaseMixture& mixture_;
58 
59  //- Compression coefficient
60  scalar cAlpha_;
61 
62  //- Surface tension 1-2
63  dimensionedScalar sigma12_;
64 
65  //- Surface tension 1-3
66  dimensionedScalar sigma13_;
67 
68  //- Stabilisation for normalisation of the interface normal
69  const dimensionedScalar deltaN_;
70 
71  surfaceScalarField nHatf_;
72  volScalarField K_;
73 
74 
75  // Private Member Functions
76 
77  //- Disallow default bitwise copy construct and assignment
79  void operator=(const threePhaseInterfaceProperties&);
80 
81  //- Correction for the boundary condition on the unit normal nHat on
82  // walls to produce the correct contact dynamic angle
83  // calculated from the component of U parallel to the wall
84  void correctContactAngle
85  (
87  ) const;
88 
89  //- Re-calculate the interface curvature
90  void calculateK();
91 
92 
93 public:
94 
95  //- Conversion factor for degrees into radians
96  static const scalar convertToRad;
97 
98 
99  // Constructors
100 
101  //- Construct from volume fraction field alpha and IOdictionary
103 
104 
105  // Member Functions
106 
107  scalar cAlpha() const
108  {
109  return cAlpha_;
110  }
112  const dimensionedScalar& deltaN() const
113  {
114  return deltaN_;
115  }
116 
117  const surfaceScalarField& nHatf() const
118  {
119  return nHatf_;
120  }
121 
122  const volScalarField& K() const
123  {
124  return K_;
125  }
126 
128  {
129  volScalarField limitedAlpha2 = max(mixture_.alpha2(), scalar(0));
130  volScalarField limitedAlpha3 = max(mixture_.alpha3(), scalar(0));
131 
132  return
133  (limitedAlpha2*sigma12_ + limitedAlpha3*sigma13_)
134  /(limitedAlpha2 + limitedAlpha3 + SMALL);
135  }
136 
138  {
139  return sigma()*K_;
140  }
141 
142  void correct()
143  {
144  calculateK();
145  }
146 };
147 
148 
149 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
150 
151 } // End namespace Foam
153 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
154 
155 #endif
156 
157 // ************************************************************************* //