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Opm::NcpFlash< Scalar, FluidSystem > Class Template Reference

Determines the phase compositions, pressures and saturations given the total mass of all components. More...

`#include <NcpFlash.hpp>`

## Static Public Member Functions

template<class FluidState , class Evaluation = typename FluidState::Scalar>
static void | guessInitial (FluidState &fluidState, const Dune::FieldVector< Evaluation, numComponents > &globalMolarities)
| Guess initial values for all quantities.
template<class MaterialLaw , class FluidState >
static void | solve (FluidState &fluidState, const typename MaterialLaw::Params &matParams, typename FluidSystem::template ParameterCache< typename FluidState::Scalar > &paramCache, const Dune::FieldVector< typename FluidState::Scalar, numComponents > &globalMolarities, Scalar tolerance=-1.0)
| Calculates the chemical equilibrium from the component fugacities in a phase.
template<class FluidState , class ComponentVector >
static void | solve (FluidState &fluidState, const ComponentVector &globalMolarities, Scalar tolerance=0.0)
| Calculates the chemical equilibrium from the component fugacities in a phase.

## Static Protected Member Functions

template<class MaterialLaw , class InputFluidState , class FlashFluidState >
static void | assignFlashFluidState_ (const InputFluidState &inputFluidState, FlashFluidState &flashFluidState, const typename MaterialLaw::Params &matParams, typename FluidSystem::template ParameterCache< typename FlashFluidState::Scalar > &flashParamCache)
template<class FlashFluidState , class OutputFluidState >
static void | assignOutputFluidState_ (const FlashFluidState &flashFluidState, OutputFluidState &outputFluidState)
template<class FlashFluidState , class FlashDefectVector , class FlashComponentVector >
static void | evalDefect_ (FlashDefectVector &b, const FlashFluidState &fluidState, const FlashComponentVector &globalMolarities)
template<class MaterialLaw , class FlashFluidState , class EvalVector >
static Scalar | update_ (FlashFluidState &fluidState, const typename MaterialLaw::Params &matParams, typename FluidSystem::template ParameterCache< typename FlashFluidState::Scalar > &paramCache, const EvalVector &deltaX)
template<class MaterialLaw , class FlashFluidState >
static void | completeFluidState_ (FlashFluidState &flashFluidState, typename FluidSystem::template ParameterCache< typename FlashFluidState::Scalar > &paramCache, const typename MaterialLaw::Params &matParams)
static bool | isPressureIdx_ (unsigned pvIdx)
static bool | isSaturationIdx_ (unsigned pvIdx)
static bool | isMoleFracIdx_ (unsigned pvIdx)
template<class FluidState >
static const FluidState::Scalar & | getQuantity_ (const FluidState &fluidState, unsigned pvIdx)
template<class FluidState >
static void | setQuantity_ (FluidState &fluidState, unsigned pvIdx, const typename FluidState::Scalar &value)
template<class FluidState >
static Scalar | quantityWeight_ (const FluidState &, unsigned pvIdx)

## Detailed Description

template<class Scalar, class FluidSystem>
class Opm::NcpFlash< Scalar, FluidSystem >

Determines the phase compositions, pressures and saturations given the total mass of all components.

In a M-phase, N-component context, we have the following unknowns:

- M pressures
- M saturations
- M*N mole fractions

This sums up to M*(N + 2). On the equations side of things, we have:

- (M - 1)*N equations stemming from the fact that the fugacity of any component is the same in all phases:
- 1 equation from the closure condition of all saturations:
- M - 1 constraints from the capillary pressures:
- N constraints from the fact that the total mass of each component is given:
- M model constraints. Here, we use the NCP constraints:

This also sums up to M*(N + 2).

The following assumptions apply: Capillary pressures are taken into account explicitly, so only the pressure of the first phase is implicitly solved for. Also, the closure condition for the saturations is taken into account explicitly, i.e., we don't need to implicitly solve for the last saturation. These two assumptions reduce the number of unknowns to the following M*(N + 1):

- 1 pressure
- M - 1 saturations
- M*N mole fractions

## Member Function Documentation

## solve() [1/2]

template<class Scalar , class FluidSystem >
template<class FluidState , class ComponentVector >

static void Opm::NcpFlash< Scalar, FluidSystem >::solve | ( | FluidState & | fluidState,
|  | const ComponentVector & | globalMolarities,
|  | Scalar | tolerance = `0.0`
| ) |  |

inline static

Calculates the chemical equilibrium from the component fugacities in a phase.

This is a convenience method which assumes that the capillary pressure is zero...

## solve() [2/2]

template<class Scalar , class FluidSystem >
template<class MaterialLaw , class FluidState >

static void Opm::NcpFlash< Scalar, FluidSystem >::solve | ( | FluidState & | fluidState,
|  | const typename MaterialLaw::Params & | matParams,
|  | typename FluidSystem::template ParameterCache< typename FluidState::Scalar > & | paramCache,
|  | const Dune::FieldVector< typename FluidState::Scalar, numComponents > & | globalMolarities,
|  | Scalar | tolerance = `-1.0`
| ) |  |

inline static

Calculates the chemical equilibrium from the component fugacities in a phase.

The phase's fugacities must already be set.

The documentation for this class was generated from the following file:

- opm/material/constraintsolvers/NcpFlash.hpp