RichardsSeff2gasVG Class Reference

van-Genuchten gas effective saturation as a function of (Pwater, Pgas), and its derivs wrt to those pressures. More...

#include <RichardsSeff2gasVG.h>

Inheritance diagram for RichardsSeff2gasVG:

Public Member Functions
	RichardsSeff2gasVG (const InputParameters &parameters)
Real	seff (std::vector< const VariableValue * > p, unsigned int qp) const
	gas effective saturation More...
void	dseff (std::vector< const VariableValue * > p, unsigned int qp, std::vector< Real > &result) const
	derivative of effective saturation as a function of porepressure More...
void	d2seff (std::vector< const VariableValue * > p, unsigned int qp, std::vector< std::vector< Real >> &result) const
	second derivative of effective saturation as a function of porepressure More...
void	initialize ()
void	execute ()
void	finalize ()

Protected Attributes
Real	_al
	van Genuchten alpha parameter More...
Real	_m
	van Genuchten m parameter More...

Detailed Description

van-Genuchten gas effective saturation as a function of (Pwater, Pgas), and its derivs wrt to those pressures.

Note that the water pressure appears first in the tuple (Pwater, Pgas)

Definition at line 25 of file RichardsSeff2gasVG.h.

Constructor & Destructor Documentation

RichardsSeff2gasVG()

RichardsSeff2gasVG::RichardsSeff2gasVG

(

const InputParameters &

parameters

)

Definition at line 39 of file RichardsSeff2gasVG.C.

  : RichardsSeff(parameters), _al(getParam<Real>("al")), _m(getParam<Real>("m"))
{
}

Member Function Documentation

d2seff()

void RichardsSeff2gasVG::d2seff ( std::vector< const VariableValue * >  p, unsigned int  qp, std::vector< std::vector< Real >> &  result  ) const

virtual

second derivative of effective saturation as a function of porepressure

Parameters

p	porepressure in the element. Note that (*p[0])[qp] is the porepressure at quadpoint qp
qp	the quad point to evaluate effective saturation at
result	the derivtives will be placed in this array

Implements RichardsSeff.

Definition at line 62 of file RichardsSeff2gasVG.C.

{
  Real negpc = (*p[0])[qp] - (*p[1])[qp];
  result[0][0] = -RichardsSeffVG::d2seff(negpc, _al, _m);
  result[0][1] = -result[0][0];
  result[1][0] = -result[0][0];
  result[1][1] = result[0][0];
}

dseff()

void RichardsSeff2gasVG::dseff ( std::vector< const VariableValue * >  p, unsigned int  qp, std::vector< Real > &  result  ) const

virtual

derivative of effective saturation as a function of porepressure

Parameters

p	porepressure in the element. Note that (*p[0])[qp] is the porepressure at quadpoint qp
qp	the quad point to evaluate effective saturation at
result	the derivtives will be placed in this array

Implements RichardsSeff.

Definition at line 52 of file RichardsSeff2gasVG.C.

{
  Real negpc = (*p[0])[qp] - (*p[1])[qp];
  result[0] = -RichardsSeffVG::dseff(negpc, _al, _m);
  result[1] = -result[0];
}

execute()

void RichardsSeff::execute ( )

inherited

Definition at line 32 of file RichardsSeff.C.

{
}

finalize()

void RichardsSeff::finalize ( )

inherited

Definition at line 37 of file RichardsSeff.C.

{
}

initialize()

void RichardsSeff::initialize ( )

inherited

Definition at line 27 of file RichardsSeff.C.

{
}

seff()

Real RichardsSeff2gasVG::seff ( std::vector< const VariableValue * >  p, unsigned int  qp  ) const

virtual

gas effective saturation

Parameters

p	porepressures. Here (*p[0])[qp] is the water pressure at quadpoint qp, and (*p[1])[qp] is the gas porepressure
qp	the quadpoint to evaluate effective saturation at

Implements RichardsSeff.

Definition at line 45 of file RichardsSeff2gasVG.C.

{
  Real negpc = (*p[0])[qp] - (*p[1])[qp];
  return 1 - RichardsSeffVG::seff(negpc, _al, _m);
}

Member Data Documentation

_al

Real RichardsSeff2gasVG::_al

protected

van Genuchten alpha parameter

Definition at line 61 of file RichardsSeff2gasVG.h.

Referenced by d2seff(), dseff(), and seff().

_m

Real RichardsSeff2gasVG::_m

protected

van Genuchten m parameter

Definition at line 64 of file RichardsSeff2gasVG.h.

Referenced by d2seff(), dseff(), and seff().

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

• richards/include/userobjects/RichardsSeff2gasVG.h
• richards/src/userobjects/RichardsSeff2gasVG.C