Represents all relevant thermodynamic quantities of a multi-phase, multi-component fluid system.  
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template<class ScalarType, class FluidSystem>
class Dumux::NonEquilibriumMassFluidState< ScalarType, FluidSystem >
This fluidstate ought to be used for the case of:
- local thermal equilibrium
- local chemical non-equilibrium 
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| void | setTemperature (const int phaseIdx, const Scalar value) | 
|  | Set the temperature \(\mathrm{[K]}\) of a fluid phase. 
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| void | setTemperature (Scalar value) | 
|  | Set the temperature \(\mathrm{[K]}\) of all fluid phases. 
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| int | wettingPhase () const | 
|  | Returns the index of the wetting phase in the fluid-solid configuration (for porous medium systems). 
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| Scalar | saturation (int phaseIdx) const | 
|  | Returns the saturation \(S_\alpha\) of a fluid phase \(\alpha\) in \(\mathrm{[-]}\). 
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| Scalar | moleFraction (int phaseIdx, int compIdx) const | 
|  | Returns the molar fraction \(x^\kappa_\alpha\) of the component \(\kappa\) in fluid phase \(\alpha\) in \(\mathrm{[-]}\). 
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| Scalar | massFraction (int phaseIdx, int compIdx) const | 
|  | Returns the mass fraction \(X^\kappa_\alpha\) of component \(\kappa\) in fluid phase \(\alpha\) in \(\mathrm{[-]}\). 
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| Scalar | averageMolarMass (int phaseIdx) const | 
|  | The average molar mass \(\overline M_\alpha\) of phase \(\alpha\) in \(\mathrm{[kg/mol]}\). 
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| Scalar | molarity (int phaseIdx, int compIdx) const | 
|  | The molar concentration \(c^\kappa_\alpha\) of component \(\kappa\) in fluid phase \(\alpha\) in \(\mathrm{[mol/m^3]}\). 
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| Scalar | fugacityCoefficient (int phaseIdx, int compIdx) const | 
|  | The fugacity coefficient \(\Phi^\kappa_\alpha\) of component \(\kappa\) in fluid phase \(\alpha\) in \(\mathrm{[-]}\). 
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| Scalar | fugacity (int phaseIdx, int compIdx) const | 
|  | The fugacity \(f^\kappa_\alpha\) of component \(\kappa\) in fluid phase \(\alpha\) in \(\mathrm{[Pa]}\). 
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| Scalar | fugacity (int compIdx) const | 
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| Scalar | molarVolume (int phaseIdx) const | 
|  | The molar volume \(v_{mol,\alpha}\) of a fluid phase \(\alpha\) in \(\mathrm{[m^3/mol]}\). 
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| Scalar | density (int phaseIdx) const | 
|  | The mass density \(\rho_\alpha\) of the fluid phase \(\alpha\) in \(\mathrm{[kg/m^3]}\). 
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| Scalar | molarDensity (int phaseIdx) const | 
|  | The molar density \(\rho_{mol,\alpha}\) of a fluid phase \(\alpha\) in \(\mathrm{[mol/m^3]}\). 
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| Scalar | temperature (const int phaseIdx) const | 
|  | The absolute temperature \(T_\alpha\) of a fluid phase \(\alpha\) in \(\mathrm{[K]}\). 
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| Scalar | temperature () const | 
|  | Get the equilibrium temperature \(\mathrm{[K]}\) of the fluid phases. 
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| Scalar | pressure (int phaseIdx) const | 
|  | The pressure \(p_\alpha\) of a fluid phase \(\alpha\) in \(\mathrm{[Pa]}\). 
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| Scalar | partialPressure (int phaseIdx, int compIdx) const | 
|  | The partial pressure of a component in a phase \(\mathrm{[Pa]}\). 
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| Scalar | enthalpy (int phaseIdx) const | 
|  | The specific enthalpy \(h_\alpha\) of a fluid phase \(\alpha\) in \(\mathrm{[J/kg]}\). 
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| Scalar | internalEnergy (int phaseIdx) const | 
|  | The specific internal energy \(u_\alpha\) of a fluid phase \(\alpha\) in \(\mathrm{[J/kg]}\). 
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| Scalar | viscosity (int phaseIdx) const | 
|  | The dynamic viscosity \(\mu_\alpha\) of fluid phase \(\alpha\) in \(\mathrm{[Pa s]}\). 
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| void | setPressure (int phaseIdx, Scalar value) | 
|  | Set the fluid pressure of a phase \(\mathrm{[Pa]}\). 
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| void | setSaturation (int phaseIdx, Scalar value) | 
|  | Set the saturation of a phase \(\mathrm{[-]}\). 
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| void | setMoleFraction (int phaseIdx, int compIdx, Scalar value) | 
|  | Set the mole fraction of a component in a phase \(\mathrm{[-]}\). 
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| void | setMassFraction (int phaseIdx, int compIdx, Scalar value) | 
|  | Set the mass fraction of a component in a phase \(\mathrm{[-]}\) and update the average molar mass \(\mathrm{[kg/mol]}\) according to the current composition of the phase. 
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| void | setFugacityCoefficient (int phaseIdx, int compIdx, Scalar value) | 
|  | Set the fugacity of a component in a phase \(\mathrm{[-]}\). 
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| void | setDensity (int phaseIdx, Scalar value) | 
|  | Set the density of a phase \(\mathrm{[kg / m^3]}\). 
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| void | setMolarDensity (int phaseIdx, Scalar value) | 
|  | Set the molar density of a phase \(\mathrm{[kg / m^3]}\). 
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| void | setEnthalpy (int phaseIdx, Scalar value) | 
|  | Set the specific enthalpy of a phase \(\mathrm{[J/m^3]}\). 
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| void | setViscosity (int phaseIdx, Scalar value) | 
|  | Set the dynamic viscosity of a phase \(\mathrm{[Pa s]}\). 
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| void | setWettingPhase (int phaseIdx) | 
|  | Set the index of the wetting phase. 
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| template<class FluidState> | 
| void | assign (const FluidState &fs) | 
|  | Retrieve all parameters from an arbitrary fluid state. 
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template<class ScalarType, class FluidSystem> 
 
The fugacity is defined as: \(f_\alpha^\kappa := \Phi^\kappa_\alpha x^\kappa_\alpha p_\alpha \;,\) where \(\Phi^\kappa_\alpha\) is the fugacity coefficient [reid1987] . The physical meaning of fugacity becomes clear from the equation: 
\[f_\alpha^\kappa = p_\alpha \exp\left\{\frac{\zeta^\kappa_\alpha}{R T_\alpha} \right\} \;,\]
 where \(\zeta^\kappa_\alpha\) represents the \(\kappa\)'s chemical potential in phase \(\alpha\), \(R\) stands for the ideal gas constant, and \(T_\alpha\) for the absolute temperature of phase \(\alpha\). Assuming thermal equilibrium, there is a one-to-one mapping between a component's chemical potential \(\zeta^\kappa_\alpha\) and its fugacity \(f^\kappa_\alpha\). In this case chemical equilibrium can thus be expressed by: 
\[f^\kappa := f^\kappa_\alpha = f^\kappa_\beta\quad\forall \alpha, \beta\]