WCNSFVSwitchableInletVelocityBC

Adds switchable inlet-velocity boundary conditionfor weakly compressible flows.

The file is similar to WCNSFVInletVelocityBC but it allows the boundary conditions to be switched on/off.

The switch_bc parameter is a boolean that is used to turn the boundary condition on/off. The parameter is controllable during runtime and can be controlled via a BoolFunctionControl.

The switch works as follows:

  • If switch = true: the boundary condition is applied as described in WCNSFVInletVelocityBC.

  • If switch = false: the boundary condition is not applied and a single sided extrapolation to the boundary is applied from internal extrapolation.

In both cases, the interpolated value at the face is controlled by face_limiter. By default, face_limiter = 1.0. face_limiter value is controllable during runtime.

Example input syntax

In this example input, the boundary conditions to the mass conservation equation and the momentum equations are specified using two WCNSFVSwitchableInletVelocityBC, one for each component of the velocity. The inlet velocity is specified using a mass flow rate postprocessor.

[FVBCs]
  # Inlet
  [inlet_u]
    type = WCNSFVInletVelocityBC
    variable = u
    boundary = 'left'
    mdot_pp = 'inlet_mdot'
    area_pp = 'surface_inlet'
    rho = 'rho'
  []
  [inlet_v]
    type = WCNSFVInletVelocityBC
    variable = v
    boundary = 'left'
    mdot_pp = 0
    area_pp = 'surface_inlet'
    rho = 'rho'
  []
  [inlet_T]
    type = WCNSFVInletTemperatureBC
    variable = T
    boundary = 'left'
    temperature_pp = 'inlet_T'
  []

  [outlet_p]
    type = INSFVOutletPressureBC
    variable = pressure
    boundary = 'right'
    function = ${outlet_pressure}
  []

  # Walls
  [no_slip_x]
    type = INSFVNoSlipWallBC
    variable = u
    boundary = 'top bottom'
    function = 0
  []
  [no_slip_y]
    type = INSFVNoSlipWallBC
    variable = v
    boundary = 'top bottom'
    function = 0
  []
[]
(contrib/moose/modules/navier_stokes/test/tests/finite_volume/wcns/boundary_conditions/dirichlet_bcs_mdot.i)

Input Parameters

  • boundaryThe list of boundary IDs from the mesh where this object applies

    C++ Type:std::vector<BoundaryName>

    Unit:(no unit assumed)

    Controllable:No

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

  • variableThe name of the variable that this boundary condition applies to

    C++ Type:NonlinearVariableName

    Unit:(no unit assumed)

    Controllable:No

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

Required Parameters

  • area_ppInlet area as a postprocessor

    C++ Type:PostprocessorName

    Unit:(no unit assumed)

    Controllable:No

    Description:Inlet area as a postprocessor

  • displacementsThe displacements

    C++ Type:std::vector<VariableName>

    Unit:(no unit assumed)

    Controllable:No

    Description:The displacements

  • face_limiter1Face flux limiter.

    Default:1

    C++ Type:double

    Unit:(no unit assumed)

    Controllable:Yes

    Description:Face flux limiter.

  • mdot_ppPostprocessor with the inlet mass flow rate

    C++ Type:PostprocessorName

    Unit:(no unit assumed)

    Controllable:No

    Description:Postprocessor with the inlet mass flow rate

  • rhoDensity functor. A functor is any of the following: a variable, a functor material property, a function, a post-processor, or a number.

    C++ Type:MooseFunctorName

    Unit:(no unit assumed)

    Controllable:No

    Description:Density functor. A functor is any of the following: a variable, a functor material property, a function, a post-processor, or a number.

  • scaling_factor1To scale the velocity

    Default:1

    C++ Type:double

    Unit:(no unit assumed)

    Controllable:No

    Description:To scale the velocity

  • switch_bcTrueSwitch on (true) / off (false) for boundary condition.

    Default:True

    C++ Type:bool

    Unit:(no unit assumed)

    Controllable:Yes

    Description:Switch on (true) / off (false) for boundary condition.

  • velocity_ppPostprocessor with the inlet velocity

    C++ Type:PostprocessorName

    Unit:(no unit assumed)

    Controllable:No

    Description:Postprocessor with the inlet velocity

Optional Parameters

  • absolute_value_vector_tagsThe tags for the vectors this residual object should fill with the absolute value of the residual contribution

    C++ Type:std::vector<TagName>

    Unit:(no unit assumed)

    Controllable:No

    Description:The tags for the vectors this residual object should fill with the absolute value of the residual contribution

  • extra_matrix_tagsThe extra tags for the matrices this Kernel should fill

    C++ Type:std::vector<TagName>

    Unit:(no unit assumed)

    Controllable:No

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

  • extra_vector_tagsThe extra tags for the vectors this Kernel should fill

    C++ Type:std::vector<TagName>

    Unit:(no unit assumed)

    Controllable:No

    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

    Unit:(no unit assumed)

    Options:nontime, system

    Controllable:No

    Description:The tag for the matrices this Kernel should fill

  • vector_tagsnontimeThe tag for the vectors this Kernel should fill

    Default:nontime

    C++ Type:MultiMooseEnum

    Unit:(no unit assumed)

    Options:nontime, time

    Controllable:No

    Description:The tag for the vectors this Kernel should fill

Tagging Parameters

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

    C++ Type:std::vector<std::string>

    Unit:(no unit assumed)

    Controllable:No

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

  • enableTrueSet the enabled status of the MooseObject.

    Default:True

    C++ Type:bool

    Unit:(no unit assumed)

    Controllable:Yes

    Description:Set the enabled status of the MooseObject.

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

    Default:True

    C++ Type:bool

    Unit:(no unit assumed)

    Controllable:No

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

  • 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

    Unit:(no unit assumed)

    Controllable:No

    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.

Advanced Parameters