## Information and Tools

Fully-upwinded advective flux of the component given by fluid_component

This Kernel implements the weak form of where all parameters are defined in the nomenclature.

note

A fully-upwinded version is implemented, where the mobility of the upstream nodes is used.

See upwinding for details. Other Kernels implement Kuzmin-Turek TVD stabilization.

## Input Parameters

• variableThe name of the variable that this Kernel operates on

C++ Type:NonlinearVariableName

Options:

Description:The name of the variable that this Kernel operates on

• PorousFlowDictatorThe UserObject that holds the list of PorousFlow variable names

C++ Type:UserObjectName

Options:

Description:The UserObject that holds the list of PorousFlow variable names

• gravityGravitational acceleration vector downwards (m/s^2)

C++ Type:libMesh::VectorValue

Options:

Description:Gravitational acceleration vector downwards (m/s^2)

### Required Parameters

• 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

• fallback_schemequickquick: use nodal mobility without preserving mass. harmonic: use a harmonic mean of nodal mobilities and preserve fluid mass

Default:quick

C++ Type:MooseEnum

Options:quick harmonic

Description:quick: use nodal mobility without preserving mass. harmonic: use a harmonic mean of nodal mobilities and preserve fluid mass

• displacementsThe displacements

C++ Type:std::vector

Options:

Description:The displacements

• full_upwind_threshold5If, for each timestep, the number of upwind-downwind swaps in an element is less than this quantity, then full upwinding is used for that element. Otherwise the fallback scheme is employed.

Default:5

C++ Type:unsigned int

Options:

Description:If, for each timestep, the number of upwind-downwind swaps in an element is less than this quantity, then full upwinding is used for that element. Otherwise the fallback scheme is employed.

• fluid_component0The index corresponding to the fluid component for this kernel

Default:0

C++ Type:unsigned int

Options:

Description:The index corresponding to the fluid component for this kernel

### Optional Parameters

• enableTrueSet the enabled status of the MooseObject.

Default:True

C++ Type:bool

Options:

Description:Set the enabled status of the MooseObject.

• save_inThe name of auxiliary variables to save this Kernel's residual contributions to. Everything about that variable must match everything about this variable (the type, what blocks it's on, etc.)

C++ Type:std::vector

Options:

Description:The name of auxiliary variables to save this Kernel's residual contributions to. Everything about that variable must match everything about this variable (the type, what blocks it's on, etc.)

• 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

• diag_save_inThe name of auxiliary variables to save this Kernel's diagonal Jacobian contributions to. Everything about that variable must match everything about this variable (the type, what blocks it's on, etc.)

C++ Type:std::vector

Options:

Description:The name of auxiliary variables to save this Kernel's diagonal Jacobian contributions to. Everything about that variable must match everything about this variable (the type, what blocks it's on, etc.)

• 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

• vector_tagsnontimeThe tag for the vectors this Kernel should fill

Default:nontime

C++ Type:MultiMooseEnum

Options:nontime time

Description:The tag for the vectors this Kernel should fill

• extra_vector_tagsThe extra tags for the vectors this Kernel should fill

C++ Type:std::vector

Options:

Description:The extra tags for the vectors this Kernel should fill

• matrix_tagssystemThe tag for the matrices this Kernel should fill

Default:system

C++ Type:MultiMooseEnum

Options:nontime system

Description:The tag for the matrices this Kernel should fill

• extra_matrix_tagsThe extra tags for the matrices this Kernel should fill

C++ Type:std::vector

Options:

Description:The extra tags for the matrices this Kernel should fill