PorousFlowCapillaryPressureBW

Broadbridge and White capillary pressure for negligable Kn

The Broadbridge-White capillarity relationship valid for small is (Broadbridge and White, 1988) (1) where (2) and is the Lambert W-function that satisfies . This is of limited use in real simulations, and is only used in the Porous Flow module for comparison with the analytical solutions of Broadbridge and White (1988) and Warrick et al. (1990) for multi-phase infiltration and drainage problems.

note

Only effective saturation as a function of capillary pressure is available

Input Parameters

  • CBW's C parameter. Must be > 1. Typical value would be 1.05.

    C++ Type:double

    Options:

    Description:BW's C parameter. Must be > 1. Typical value would be 1.05.

  • SnLow 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.

    C++ Type:double

    Options:

    Description: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.

  • lasBW's lambda_s parameter multiplied by (fluid_density * gravity). Must be > 0. Typical value would be 1E5

    C++ Type:double

    Options:

    Description:BW's lambda_s parameter multiplied by (fluid_density * gravity). Must be > 0. Typical value would be 1E5

Required Parameters

  • Ss1High saturation. This must be > Sn and <= 1. Effective saturation where porepressure = 0. Effective saturation never exceeds this value in BW's simulations/models.

    Default:1

    C++ Type:double

    Options:

    Description:High saturation. This must be > Sn and <= 1. Effective saturation where porepressure = 0. Effective saturation never exceeds this value in BW's simulations/models.

  • pc_max1e+09Maximum capillary pressure (Pa). Must be > 0. Default is 1e9

    Default:1e+09

    C++ Type:double

    Options:

    Description:Maximum capillary pressure (Pa). Must be > 0. Default is 1e9

  • sat_lr0Liquid residual saturation. Must be between 0 and 1. Default is 0

    Default:0

    C++ Type:double

    Options:

    Description:Liquid residual saturation. Must be between 0 and 1. Default is 0

  • log_extensionTrueUse a logarithmic extension for low saturation to avoid capillary pressure going to infinity. Default is true. Set to false if your capillary pressure depends on spatially-dependent variables other than saturation, as the log-extension C++ code for this case has yet to be implemented

    Default:True

    C++ Type:bool

    Options:

    Description:Use a logarithmic extension for low saturation to avoid capillary pressure going to infinity. Default is true. Set to false if your capillary pressure depends on spatially-dependent variables other than saturation, as the log-extension C++ code for this case has yet to be implemented

  • blockThe list of block ids (SubdomainID) that this object will be applied

    C++ Type:std::vector

    Options:

    Description:The list of block ids (SubdomainID) that this object will be applied

Optional Parameters

  • enableTrueSet the enabled status of the MooseObject.

    Default:True

    C++ Type:bool

    Options:

    Description:Set the enabled status of the MooseObject.

  • allow_duplicate_execution_on_initialFalseIn the case where this UserObject is depended upon by an initial condition, allow it to be executed twice during the initial setup (once before the IC and again after mesh adaptivity (if applicable).

    Default:False

    C++ Type:bool

    Options:

    Description:In the case where this UserObject is depended upon by an initial condition, allow it to be executed twice during the initial setup (once before the IC and again after mesh adaptivity (if applicable).

  • use_displaced_meshFalseWhether or not this object should use the displaced mesh for computation. Note that in the case this is true but no displacements are provided in the Mesh block the undisplaced mesh will still be used.

    Default:False

    C++ Type:bool

    Options:

    Description:Whether or not this object should use the displaced mesh for computation. Note that in the case this is true but no displacements are provided in the Mesh block the undisplaced mesh will still be used.

  • control_tagsAdds user-defined labels for accessing object parameters via control logic.

    C++ Type:std::vector

    Options:

    Description:Adds user-defined labels for accessing object parameters via control logic.

  • seed0The seed for the master random number generator

    Default:0

    C++ Type:unsigned int

    Options:

    Description:The seed for the master random number generator

  • implicitTrueDetermines whether this object is calculated using an implicit or explicit form

    Default:True

    C++ Type:bool

    Options:

    Description:Determines whether this object is calculated using an implicit or explicit form

Advanced Parameters

Input Files

References

  1. P. Broadbridge and I. White. Constant rate rainfall infiltration: a versatile nonlinear model, 1. analytical solution. Water Resources Research, 24:145–154, 1988.[BibTeX]
  2. A. W. Warrick, D. O. Lomen, and A. Islas. An analytical solution to Richards' Equation for a Draining Soil Profile. Water Resources Research, 26:253–258, 1990.[BibTeX]