- variableThe name of the variable that this boundary condition applies to
C++ Type:NonlinearVariableName

Description:The name of the variable that this boundary condition applies to

- boundaryThe list of boundary IDs from the mesh where this boundary condition applies
C++ Type:std::vector

Description:The list of boundary IDs from the mesh where this boundary condition applies

# ConvectiveFluxBC

Determines boundary values via the initial and final values, flux, and exposure duration

## Description

The `ConvectiveFluxBC`

boundary condition determines the value on a boundary based upon the initial and final values, the flux through the boundary and the duration of exposure.

## Example Input Syntax

```
[BCs]
active = 'left right'
[./left]
type = DirichletBC
variable = u
boundary = 3
value = 0.0
[../]
[./right]
type = ConvectiveFluxBC
variable = u
boundary = 1
rate = 100
initial = 10
final = 20
duration = 10
[../]
[]
```

(test/tests/bcs/misc_bcs/convective_flux_bc.i)## Input Parameters

- duration0
Default:0

C++ Type:double

- rate7500
Default:7500

C++ Type:double

- initial500
Default:500

C++ Type:double

- final500
Default:500

C++ Type:double

### Optional Parameters

- enableTrueSet the enabled status of the MooseObject.
Default:True

C++ Type:bool

Description:Set the enabled status of the MooseObject.

- save_inThe name of auxiliary variables to save this BC'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

Description:The name of auxiliary variables to save this BC'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

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

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

Description:The seed for the master random number generator

- diag_save_inThe name of auxiliary variables to save this BC'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

Description:The name of auxiliary variables to save this BC'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

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

### Advanced Parameters

- vector_tagsnontimeThe tag for the vectors this Kernel should fill
Default:nontime

C++ Type:MultiMooseEnum

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

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

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

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

### Tagging Parameters

## Input Files

- modules/combined/test/tests/heat_convection/heat_convection_rz_tf_test.i
- test/tests/bcs/misc_bcs/convective_flux_bc.i
- modules/combined/test/tests/heat_convection/heat_convection_3d_test.i
- modules/combined/test/tests/heat_convection/heat_convection_rz_test.i
- modules/combined/test/tests/heat_convection/heat_convection_3d_tf_test.i