diffusionGasEvaporation.H
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10License
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24 along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
25
26Class
27 Foam::meltingEvaporationModels::diffusionGasEvaporation
28
29Description
30 Gas diffusion based evaporation/condensation mass transfer model.
31
32 THE evaporation rate is given by:
33
34 \f[
35 \hat{m_i} =
36 - C \rho_{g} D_{v,i}
37 \frac
38 {
39 \frac{dY_{v,i}}{dn}
40 }
41 {
42 1 - \; \sum_{1}^{Nv}Y_{g,j}
43 }
44 \f]
45
46 where:
47 \vartable
48 \hat{m_i} | mass flux rate [kg/s/m2]
49 \rho_{g} | gas phase density
50 D_{v,i} | diffusion coefficient
51 C | model coefficient
52 \frac{dY_{v,i}}{dn} | normal derivative of evaporated component
53 Y_{g,j} | mass fraction at the surface
54 \endvartable
55
56Usage
57 Example usage:
58 \verbatim
59 massTransferModel
60 (
61 (liquid to gas)
62 {
63 // Mandatory entries
64 type diffusionGasEvaporation;
65 species vapour.gas;
66 C 1;
67 saturationPressure
68 {
69 type Antoine;
70 A 3.55;
71 B 643;
72 C -198;
73 }
74
75 // Optional entries
76 isoAlpha <scalar>;
77 Tactivate <scalar>;
78
79 // Inherited entries
80 ...
81 }
82 );
83 \endverbatim
84
85 where:
86 \table
87 Property | Description | Type | Reqd | Deflt
88 type | Type name: diffusionGasEvaporation | word | yes | -
89 saturationPressure | Saturation model | dict | yes | -
90 isoAlpha | Iso-alpha for interface | scalar | no | 0.5
91 C | Model coefficient | scalar | yes | -
92 Tactivate | Saturation temperature | scalar | no | 0
93 \endtable
94
95 The inherited entries are elaborated in:
96 - \link InterfaceCompositionModel.H \endlink
97 - \link saturationModel.H \endlink
98
99SourceFiles
100 diffusionGasEvaporation.C
101
102\*---------------------------------------------------------------------------*/
103
104#ifndef Foam_meltingEvaporationModels_diffusionGasEvaporation_H
105#define Foam_meltingEvaporationModels_diffusionGasEvaporation_H
106
107#include "InterfaceCompositionModel.H"
108#include "saturationModel.H"
109
110// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *//
111
112namespace Foam
113{
114
115// Forward Declarations
116class phasePair;
117
118namespace meltingEvaporationModels
119{
120
121/*---------------------------------------------------------------------------*\
122 Class diffusionGasEvaporation Declaration
123\*---------------------------------------------------------------------------*/
124
125template<class Thermo, class OtherThermo>
126class diffusionGasEvaporation
127:
128 public InterfaceCompositionModel<Thermo, OtherThermo>
129{
130 // Private Data
131
132 //- Saturation pressure model
133 autoPtr<saturationModel> saturationModelPtr_;
134
135 //- Interface Iso-value
136 scalar isoAlpha_;
137
138 //- Evaporation coefficient
140
141 //- Activation temperature
142 const dimensionedScalar Tactivate_;
143
144 //- Interface area
145 volScalarField interfaceArea_;
146
147 //- Mass source
148 volScalarField mDotc_;
149
150
151 // Private Member Functions
152
153 //- Update interface
154 void updateInterface(const volScalarField& T);
155
156
157public:
158
159 //- Runtime type information
160 TypeName("diffusionGasEvaporation");
161
162
163 // Constructors
164
165 //- Construct from components
167 (
168 const dictionary& dict,
169 const phasePair& pair
170 );
171
172
173 //- Destructor
174 virtual ~diffusionGasEvaporation() = default;
175
176
177 // Member Functions
178
179 //- Explicit total mass transfer coefficient
181 (
182 const volScalarField& field
183 );
184
185 //- Implicit mass transfer coefficient
187 (
188 label modelVariable,
189 const volScalarField& field
190 );
191
192 //- Explicit mass transfer coefficient
194 (
195 label modelVariable,
196 const volScalarField& field
197 );
198
199 //- Return Tactivate
200 virtual const dimensionedScalar& Tactivate() const noexcept
201 {
202 return Tactivate_;
203 }
204
205 //- Add/subtract alpha*div(U) as a source term
206 //- for alpha, substituting div(U) = mDot(1/rho1 - 1/rho2)
207 virtual bool includeDivU() const noexcept
208 {
209 return true;
210 }
211};
212
213
214// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
215
216} // End namespace meltingEvaporationModels
217} // End namespace Foam
218
219// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
220
221#ifdef NoRepository
223#endif
224
225// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
226#endif
227
228// ************************************************************************* //
Base class for interface composition models, templated on the two thermodynamic models either side of...
Pointer management similar to std::unique_ptr, with some additional methods and type checking.
Definition: autoPtr.H:66
A list of keyword definitions, which are a keyword followed by a number of values (eg,...
Definition: dictionary.H:126
Gas diffusion based evaporation/condensation mass transfer model.
virtual tmp< volScalarField > Kexp(const volScalarField &field)
Explicit total mass transfer coefficient.
virtual tmp< volScalarField > KSu(label modelVariable, const volScalarField &field)
Explicit mass transfer coefficient.
diffusionGasEvaporation(const dictionary &dict, const phasePair &pair)
Construct from components.
TypeName("diffusionGasEvaporation")
Runtime type information.
virtual const dimensionedScalar & Tactivate() const noexcept
Return Tactivate.
virtual tmp< volScalarField > KSp(label modelVariable, const volScalarField &field)
Implicit mass transfer coefficient.
const phasePair & pair() const
The phase pair.
modelVariable
Enumeration for variable based mass transfer models.
Description for mass transfer between a pair of phases. The direction of the mass transfer is from th...
Definition: phasePair.H:56
A class for managing temporary objects.
Definition: tmp.H:65
rDeltaTY field()
Namespace for OpenFOAM.
dimensioned< scalar > dimensionedScalar
Dimensioned scalar obtained from generic dimensioned type.
GeometricField< scalar, fvPatchField, volMesh > volScalarField
Definition: volFieldsFwd.H:82
const direction noexcept
Definition: Scalar.H:223
dictionary dict
#define TypeName(TypeNameString)
Declare a ClassName() with extra virtual type info.
Definition: typeInfo.H:73