GCC Code Coverage Report


Directory: ../../../builds/dumux-repositories/
File: /builds/dumux-repositories/dumux/dumux/material/fluidstates/immiscible.hh
Date: 2024-09-21 20:52:54
Exec Total Coverage
Lines: 25 48 52.1%
Functions: 0 139 0.0%
Branches: 138 274 50.4%

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1 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
2 // vi: set et ts=4 sw=4 sts=4:
3 //
4 // SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
5 // SPDX-License-Identifier: GPL-3.0-or-later
6 //
7 /*!
8 * \file
9 * \ingroup FluidStates
10 * \brief Represents all relevant thermodynamic quantities of a
11 * multi-phase fluid system assuming immiscibility and
12 * thermodynamic equilibrium.
13 */
14 #ifndef DUMUX_IMMISCIBLE_FLUID_STATE_HH
15 #define DUMUX_IMMISCIBLE_FLUID_STATE_HH
16
17 #include <limits>
18 #include <type_traits>
19
20 namespace Dumux {
21
22 /*!
23 * \ingroup FluidStates
24 * \brief Represents all relevant thermodynamic quantities of a
25 * multi-phase fluid system assuming immiscibility and
26 * thermodynamic equilibrium.
27 */
28 template <class ScalarType, class FluidSystem>
29 class ImmiscibleFluidState
30 {
31 public:
32 static constexpr int numPhases = FluidSystem::numPhases;
33 static constexpr int numComponents = FluidSystem::numComponents;
34
35 //! export the scalar type
36 using Scalar = ScalarType;
37
38 //! default constructor
39
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137890216 ImmiscibleFluidState() = default;
40
41 //! copy constructor from arbitrary fluid state
42 template <class FluidState, typename std::enable_if_t<!std::is_same<FluidState, ImmiscibleFluidState>::value, int> = 0>
43 ImmiscibleFluidState(const FluidState &fs)
44 { assign(fs); }
45
46 // copy and move constructor / assignment operator
47 ImmiscibleFluidState(const ImmiscibleFluidState &fs) = default;
48 ImmiscibleFluidState(ImmiscibleFluidState &&fs) = default;
49 ImmiscibleFluidState& operator=(const ImmiscibleFluidState &fs) = default;
50 ImmiscibleFluidState& operator=(ImmiscibleFluidState &&fs) = default;
51
52 /*****************************************************
53 * Generic access to fluid properties (No assumptions
54 * on thermodynamic equilibrium required)
55 *****************************************************/
56
57 /*!
58 * \brief Returns the index of the most wetting phase in the
59 * fluid-solid configuration (for porous medium systems).
60 */
61 int wettingPhase() const { return wPhaseIdx_; }
62
63 /*!
64 * \brief Returns the saturation \f$S_\alpha\f$ of a fluid phase \f$\alpha\f$ in \f$\mathrm{[-]}\f$.
65 *
66 * The saturation is defined as the pore space occupied by the fluid divided by the total pore space:
67 * \f[S_\alpha := \frac{\phi \mathcal{V}_\alpha}{\phi \mathcal{V}}\f]
68 *
69 * \param phaseIdx the index of the phase
70 */
71 Scalar saturation(int phaseIdx) const
72
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752678636 { return saturation_[phaseIdx]; }
73
74 /*!
75 * \brief Returns the molar fraction \f$x^\kappa_\alpha\f$ of the component \f$\kappa\f$ in fluid phase \f$\alpha\f$ in \f$\mathrm{[-]}\f$.
76 *
77 * The molar fraction \f$x^\kappa_\alpha\f$ is defined as the ratio of the number of molecules
78 * of component \f$\kappa\f$ and the total number of molecules of the phase \f$\alpha\f$.
79 * They are set either 1 or 0 in a phase since this is an immiscible fluidstate.
80 * \param phaseIdx the index of the phase
81 * \param compIdx the index of the component
82 */
83 Scalar moleFraction(int phaseIdx, int compIdx) const
84
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8938444 { return (phaseIdx == compIdx) ? 1.0 : 0.0; }
85
86 /*!
87 * \brief Returns the mass fraction \f$X^\kappa_\alpha\f$ of component \f$\kappa\f$ in fluid phase \f$\alpha\f$ in \f$\mathrm{[-]}\f$.
88 *
89 * They are set either 1 or 0 in a phase since this is an immiscible fluidstate.
90 *
91 * \param phaseIdx the index of the phase
92 * \param compIdx the index of the component
93 */
94 Scalar massFraction(int phaseIdx, int compIdx) const
95 { return (phaseIdx == compIdx) ? 1.0 : 0.0; }
96
97 /*!
98 * \brief The average molar mass \f$\overline M_\alpha\f$ of phase \f$\alpha\f$ in \f$\mathrm{[kg/mol]}\f$
99 *
100 * The average molar mass is the mean mass of a mole of the
101 * fluid at current composition. It is defined as the sum of the
102 * component's molar masses weighted by the current mole fraction:
103 * \f[\mathrm{ \overline M_\alpha = \sum_\kappa M^\kappa x_\alpha^\kappa}\f]
104 *
105 * Since this is an immiscible fluidstate we simply consider the molarMass of the
106 * pure component/phase.
107 */
108 Scalar averageMolarMass(int phaseIdx) const
109
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58060534 { return FluidSystem::molarMass(/*compIdx=*/phaseIdx); }
110
111 /*!
112 * \brief The molar concentration \f$c^\kappa_\alpha\f$ of component \f$\kappa\f$ in fluid phase \f$\alpha\f$ in \f$\mathrm{[mol/m^3]}\f$
113 *
114 * This quantity is usually called "molar concentration" or just
115 * "concentration", but there are many other (though less common)
116 * measures for concentration.
117 *
118 * http://en.wikipedia.org/wiki/Concentration
119 */
120 Scalar molarity(int phaseIdx, int compIdx) const
121 18 { return molarDensity(phaseIdx)*moleFraction(phaseIdx, compIdx); }
122
123 /*!
124 * \brief The fugacity \f$f^\kappa_\alpha\f$ of component \f$\kappa\f$
125 * in fluid phase \f$\alpha\f$ in \f$\mathrm{[Pa]}\f$
126 *
127 * The fugacity is defined as:
128 * \f$f_\alpha^\kappa := \Phi^\kappa_\alpha x^\kappa_\alpha p_\alpha \;,\f$
129 * where \f$\Phi^\kappa_\alpha\f$ is the fugacity coefficient \cite reid1987 .
130 * The physical meaning of fugacity becomes clear from the equation:
131 * \f[f_\alpha^\kappa = p_\alpha \exp\left\{\frac{\zeta^\kappa_\alpha}{R T_\alpha} \right\} \;,\f]
132 * where \f$\zeta^\kappa_\alpha\f$ represents the \f$\kappa\f$'s chemical
133 * potential in phase \f$\alpha\f$, \f$R\f$ stands for the ideal gas constant,
134 * and \f$T_\alpha\f$ for the absolute temperature of phase \f$\alpha\f$. Assuming thermal equilibrium,
135 * there is a one-to-one mapping between a component's chemical potential
136 * \f$\zeta^\kappa_\alpha\f$ and its fugacity \f$f^\kappa_\alpha\f$. In this
137 * case chemical equilibrium can thus be expressed by:
138 * \f[f^\kappa := f^\kappa_\alpha = f^\kappa_\beta\quad\forall \alpha, \beta\f]
139 *
140 * To avoid numerical issues with code that assumes miscibility,
141 * we return a fugacity of 0 for components which do not mix with
142 * the specified phase. (Actually it is undefined, but for finite
143 * fugacity coefficients, the only way to get components
144 * completely out of a phase is 0 to feed it zero fugacity.)
145 */
146 Scalar fugacity(int phaseIdx, int compIdx) const
147
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1 { return phaseIdx == compIdx ? pressure(phaseIdx) : 0.0; }
148
149 /*!
150 * \brief The fugacity coefficient \f$\Phi^\kappa_\alpha\f$ of component \f$\kappa\f$ in fluid phase \f$\alpha\f$ in \f$\mathrm{[-]}\f$
151 *
152 * Since we assume immiscibility, the fugacity coefficients for
153 * the components which are not miscible with the phase is
154 * infinite. Beware that this will very likely break your code if
155 * you don't keep that in mind.
156 */
157 Scalar fugacityCoefficient(int phaseIdx, int compIdx) const
158 { return phaseIdx == compIdx ? 1.0 : std::numeric_limits<Scalar>::infinity(); }
159
160 /*!
161 * \brief The partial pressure of a component in a phase \f$\mathrm{[Pa]}\f$
162 *
163 * To avoid numerical issues with code that assumes miscibility,
164 * we return a partial pressure of 0 for components which do not mix with
165 * the specified phase. Actually it is undefined.
166 */
167 Scalar partialPressure(int phaseIdx, int compIdx) const
168 8298092 { return phaseIdx == compIdx ? pressure(phaseIdx) : 0.0; }
169
170 /*!
171 * \brief The molar volume \f$v_{mol,\alpha}\f$ of a fluid phase \f$\alpha\f$ in \f$\mathrm{[m^3/mol]}\f$
172 *
173 * This quantity is the inverse of the molar density.
174 */
175 Scalar molarVolume(int phaseIdx) const
176
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1 { return 1.0/molarDensity(phaseIdx); }
177
178 /*!
179 * \brief The mass density \f$\rho_\alpha\f$ of the fluid phase
180 * \f$\alpha\f$ in \f$\mathrm{[kg/m^3]}\f$
181 */
182 Scalar density(int phaseIdx) const
183
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2980154270 { return density_[phaseIdx]; }
184
185 /*!
186 * \brief The molar density \f$\rho_{mol,\alpha}\f$
187 * of a fluid phase \f$\alpha\f$ in \f$\mathrm{[mol/m^3]}\f$
188 *
189 * The molar density is defined by the mass density \f$\rho_\alpha\f$ and the mean molar mass \f$\overline M_\alpha\f$:
190 *
191 * \f[\rho_{mol,\alpha} = \frac{\rho_\alpha}{\overline M_\alpha} \;.\f]
192 */
193 Scalar molarDensity(int phaseIdx) const
194
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269 { return molarDensity_[phaseIdx]; }
195
196 /*!
197 * \brief The absolute temperature\f$T_\alpha\f$ of a fluid phase \f$\alpha\f$ in \f$\mathrm{[K]}\f$
198 */
199 Scalar temperature(int phaseIdx) const
200
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469503588 { return temperature_[phaseIdx]; }
201
202 /*!
203 * \brief The pressure \f$p_\alpha\f$ of a fluid phase \f$\alpha\f$ in \f$\mathrm{[Pa]}\f$
204 */
205 Scalar pressure(int phaseIdx) const
206
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2105159163 { return pressure_[phaseIdx]; }
207
208 /*!
209 * \brief The specific enthalpy \f$h_\alpha\f$ of a fluid phase \f$\alpha\f$ in \f$\mathrm{[J/kg]}\f$
210 */
211 Scalar enthalpy(int phaseIdx) const
212
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25984185 { return enthalpy_[phaseIdx]; }
213
214 /*!
215 * \brief The specific internal energy \f$u_\alpha\f$ of a fluid phase \f$\alpha\f$ in \f$\mathrm{[J/kg]}\f$
216 *
217 * The specific internal energy is defined by the relation:
218 *
219 * \f[u_\alpha = h_\alpha - \frac{p_\alpha}{\rho_\alpha}\f]
220 */
221 Scalar internalEnergy(int phaseIdx) const
222
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43912665 { return enthalpy_[phaseIdx] - pressure(phaseIdx)/density(phaseIdx); }
223
224 /*!
225 * \brief The dynamic viscosity \f$\mu_\alpha\f$ of fluid phase \f$\alpha\f$ in \f$\mathrm{[Pa s]}\f$
226 */
227 Scalar viscosity(int phaseIdx) const
228
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485180530 { return viscosity_[phaseIdx]; }
229
230 /*****************************************************
231 * Access to fluid properties which only make sense
232 * if assuming thermodynamic equilibrium
233 *****************************************************/
234
235 /*!
236 * \brief The temperature within the domain \f$\mathrm{[K]}\f$
237 */
238 Scalar temperature() const
239 { return temperature_[0]; }
240
241 /*!
242 * \brief The fugacity of a component \f$\mathrm{[Pa]}\f$
243 *
244 * This assumes chemical equilibrium.
245 */
246 Scalar fugacity(int compIdx) const
247 { return fugacity(0, compIdx); }
248
249
250 /*****************************************************
251 * Setter methods. Note that these are not part of the
252 * generic FluidState interface but specific for each
253 * implementation...
254 *****************************************************/
255
256 /*!
257 * \brief Retrieve all parameters from an arbitrary fluid
258 * state.
259 * \param fs Fluidstate
260 *
261 * \note If the other fluid state object is inconsistent with the
262 * thermodynamic equilibrium, the result of this method is
263 * undefined.
264 */
265 template <class FluidState>
266 void assign(const FluidState &fs)
267 {
268 for (int phaseIdx = 0; phaseIdx < numPhases; ++phaseIdx)
269 {
270 pressure_[phaseIdx] = fs.pressure(phaseIdx);
271 saturation_[phaseIdx] = fs.saturation(phaseIdx);
272 density_[phaseIdx] = fs.density(phaseIdx);
273 molarDensity_[phaseIdx] = fs.molarDensity(phaseIdx);
274 enthalpy_[phaseIdx] = fs.enthalpy(phaseIdx);
275 viscosity_[phaseIdx] = fs.viscosity(phaseIdx);
276 temperature_[phaseIdx] = fs.temperature(0);
277 }
278 }
279
280 /*!
281 * \brief Set the temperature \f$\mathrm{[K]}\f$ of a fluid phase
282 */
283 void setTemperature(int phaseIdx, Scalar value)
284
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285869822 { temperature_[phaseIdx] = value; }
285
286 /*!
287 * \brief Set the temperature \f$\mathrm{[K]}\f$ of a fluid phase
288 */
289 void setTemperature(Scalar value)
290 {
291
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102890 for (int phaseIdx = 0; phaseIdx < numPhases; ++phaseIdx)
292
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25 temperature_[phaseIdx] = value;
293 }
294
295 /*!
296 * \brief Set the fluid pressure of a phase \f$\mathrm{[Pa]}\f$
297 */
298 void setPressure(int phaseIdx, Scalar value)
299
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197750593 { pressure_[phaseIdx] = value; }
300
301 /*!
302 * \brief Set the saturation of a phase \f$\mathrm{[-]}\f$
303 */
304 void setSaturation(int phaseIdx, Scalar value)
305
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285860501 { saturation_[phaseIdx] = value; }
306
307 /*!
308 * \brief Set the density of a phase \f$\mathrm{[kg/m^3]}\f$
309 */
310 void setDensity(int phaseIdx, Scalar value)
311
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221857177 { density_[phaseIdx] = value; }
312
313 /*!
314 * \brief Set the molar density of a phase \f$\mathrm{[kg/m^3]}\f$
315 */
316 void setMolarDensity(int phaseIdx, Scalar value)
317 268 { molarDensity_[phaseIdx] = value; }
318
319 /*!
320 * \brief Set the specific enthalpy of a phase \f$\mathrm{[J/kg]}\f$
321 */
322 void setEnthalpy(int phaseIdx, Scalar value)
323
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244584423 { enthalpy_[phaseIdx] = value; }
324
325 /*!
326 * \brief Set the dynamic viscosity of a phase \f$\mathrm{[Pa s]}\f$
327 */
328 void setViscosity(int phaseIdx, Scalar value)
329
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202597709 { viscosity_[phaseIdx] = value; }
330
331 /*!
332 * \brief Set the index of the most wetting phase
333 */
334 void setWettingPhase(int phaseIdx)
335
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74857634 { wPhaseIdx_ = phaseIdx; }
336 protected:
337 //! zero-initialize all data members with braces syntax
338 Scalar pressure_[numPhases] = {};
339 Scalar saturation_[numPhases] = {};
340 Scalar density_[numPhases] = {};
341 Scalar molarDensity_[numPhases] = {};
342 Scalar enthalpy_[numPhases] = {};
343 Scalar viscosity_[numPhases] = {};
344 Scalar temperature_[numPhases] = {};
345
346 int wPhaseIdx_{0};
347 };
348
349 } // end namespace Dumux
350
351 #endif
352