RichardsSeff1BWsmall.h File Reference

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Classes
class	RichardsSeff1BWsmall
	"Broadbridge-White" form of effective saturation for Kn small as a function of porepressure (not capillary pressure, so Seff = 1 for p>=0). More...

Functions
template<>
InputParameters	validParams< RichardsSeff1BWsmall > ()

Function Documentation

validParams< RichardsSeff1BWsmall >()

template<>

InputParameters validParams< RichardsSeff1BWsmall >

(

)

Definition at line 21 of file RichardsSeff1BWsmall.C.

{
  InputParameters params = validParams<RichardsSeff>();
  params.addRequiredRangeCheckedParam<Real>(
      "Sn",
      "Sn >= 0",
      "Low saturation.  This must be < Ss, and non-negative.  This is BW's "
      "initial effective saturation, below which effective saturation never goes "
      "in their simulations/models.  If Kn=0 then Sn is the immobile saturation.  "
      "This form of effective saturation is only correct for Kn small.");
  params.addRangeCheckedParam<Real>(
      "Ss",
      1.0,
      "Ss <= 1",
      "High saturation.  This must be > Sn and <= 1.  Effective saturation "
      "where porepressure = 0.  Effective saturation never exceeds this "
      "value in BW's simulations/models.");
  params.addRequiredRangeCheckedParam<Real>(
      "C", "C > 1", "BW's C parameter.  Must be > 1.  Typical value would be 1.05.");
  params.addRequiredRangeCheckedParam<Real>("las",
                                            "las > 0",
                                            "BW's lambda_s parameter multiplied "
                                            "by (fluiddensity*gravity).  Must be "
                                            "> 0.  Typical value would be 1E5");
  params.addClassDescription("Broadbridge-white form of effective saturation for negligable Kn.  "
                             "Then porepressure = -las*( (1-th)/th - (1/c)Ln((C-th)/((C-1)th))), "
                             "for th = (Seff - Sn)/(Ss - Sn).  A Lambert-W function must be "
                             "evaluated to express Seff in terms of porepressure, which can be "
                             "expensive");
  return params;
}