variableHeightFlowRateInletVelocityFvPatchVectorField.H
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23 
24 Class
25  Foam::variableHeightFlowRateInletVelocityFvPatchVectorField
26 
27 Description
28  This boundary condition provides a velocity boundary condition for
29  multiphase flow based on a user-specified volumetric flow rate.
30 
31  The flow rate is made proportional to the phase fraction alpha at each
32  face of the patch and alpha is ensured to be bound between 0 and 1.
33 
34 Usage
35  \table
36  Property | Description | Required | Default value
37  flowRate | volumetric flow rate [m^3/s] | yes |
38  alpha | phase-fraction field | yes |
39  \endtable
40 
41  Example of the boundary condition specification:
42  \verbatim
43  <patchName>
44  {
45  type variableHeightFlowRateInletVelocity;
46  flowRate 0.2;
47  alpha alpha.water;
48  value uniform (0 0 0); // placeholder
49  }
50  \endverbatim
51 
52  The \c flowRate entry is a \c Function1 of time, see Foam::Function1s.
53 
54 Note
55  - the value is positive into the domain
56  - may not work correctly for transonic inlets
57  - strange behaviour with potentialFoam since the momentum equation is
58  not solved
59 
60 See also
61  Foam::fixedValueFvPatchField
62  Foam::Function1s
63 
64 SourceFiles
65  variableHeightFlowRateInletVelocityFvPatchVectorField.C
66 
67 \*---------------------------------------------------------------------------*/
68 
69 #ifndef variableHeightFlowRateInletVelocityFvPatchVectorField_H
70 #define variableHeightFlowRateInletVelocityFvPatchVectorField_H
71 
73 #include "Function1.H"
74 
75 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
76 
77 namespace Foam
78 {
79 /*---------------------------------------------------------------------------*\
80  Class variableHeightFlowRateInletVelocityFvPatchVectorField Declaration
81 \*---------------------------------------------------------------------------*/
82 
83 class variableHeightFlowRateInletVelocityFvPatchVectorField
84 :
85  public fixedValueFvPatchVectorField
86 {
87  // Private Data
88 
89  //- Inlet integral flow rate
90  autoPtr<Function1<scalar>> flowRate_;
91 
92  //- Name of the phase-fraction field
93  word alphaName_;
94 
95 
96 public:
97 
98  //- Runtime type information
99  TypeName("variableHeightFlowRateInletVelocity");
100 
101 
102  // Constructors
103 
104  //- Construct from patch and internal field
106  (
107  const fvPatch&,
109  );
110 
111  //- Construct from patch, internal field and dictionary
113  (
114  const fvPatch&,
116  const dictionary&
117  );
118 
119  //- Construct by mapping given
120  // variableHeightFlowRateInletVelocityFvPatchVectorField
121  // onto a new patch
123  (
125  const fvPatch&,
127  const fvPatchFieldMapper&
128  );
129 
130  //- Copy constructor
132  (
134  );
135 
136  //- Construct and return a clone
137  virtual tmp<fvPatchVectorField> clone() const
138  {
140  (
142  );
143  }
144 
145  //- Copy constructor setting internal field reference
147  (
150  );
152  //- Construct and return a clone setting internal field reference
154  (
156  ) const
157  {
159  (
161  (
162  *this,
163  iF
164  )
165  );
166  }
167 
169  // Member Functions
170 
171  //- Update the coefficients associated with the patch field
172  virtual void updateCoeffs();
173 
174  //- Write
175  virtual void write(Ostream&) const;
176 };
177 
178 
179 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
180 
181 } // End namespace Foam
182 
183 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
184 
185 #endif
186 
187 // ************************************************************************* //
virtual void updateCoeffs()
Update the coefficients associated with the patch field.
A list of keyword definitions, which are a keyword followed by any number of values (e...
Definition: dictionary.H:158
A finiteVolume patch using a polyPatch and a fvBoundaryMesh.
Definition: fvPatch.H:61
This boundary condition provides a velocity boundary condition for multiphase flow based on a user-sp...
Foam::fvPatchFieldMapper.
variableHeightFlowRateInletVelocityFvPatchVectorField(const fvPatch &, const DimensionedField< vector, volMesh > &)
Construct from patch and internal field.
An Ostream is an abstract base class for all output systems (streams, files, token lists...
Definition: Ostream.H:54
virtual tmp< fvPatchVectorField > clone() const
Construct and return a clone.
Field with dimensions and associated with geometry type GeoMesh which is used to size the field and a...
A class for managing temporary objects.
Definition: PtrList.H:53
TypeName("variableHeightFlowRateInletVelocity")
Runtime type information.
Namespace for OpenFOAM.