- boundaryThe list of boundary IDs from the mesh where this object applies
C++ Type:std::vector<BoundaryName>
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
Controllable:No
Description:The name of the variable that this boundary condition applies to
WCNSFVInletVelocityBC
Defines a Dirichlet boundary condition for finite volume method.
There are two options for specifying a component of the inlet velocity:
specifying a velocity postprocessor
specifying a mass flow rate postprocessor and a density functor. The functor is usually a functor material property, defined by a GeneralFunctorFluidProps. The scaling factor can be used to account for projections if the inlet flow and the surface are not aligned.
This boundary condition works with postprocessors, which may be replaced by constant values in the input. The intended use case for this boundary condition is to be receiving its value from a coupled application, using a Receiver postprocessor.
Specifying the inlet velocity using a WCNSFVInletVelocityBC
will not preserve mass or momentum flow at the boundary in most cases, in part because of the discretization error. Specifying incoming mass and momentum fluxes using a WCNSFVMassFluxBC and a WCNSFVMomentumFluxBC is currently the only conservative approach.
Example input syntax
In this example input, the boundary conditions to the mass conservation equation and the momentum equations are specified using two WCNSFVInletVelocityBC
, 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
[]
[]
(moose/modules/navier_stokes/test/tests/finite_volume/wcns/boundary_conditions/dirichlet_bcs_mdot.i)Input Parameters
- area_ppInlet area as a postprocessor
C++ Type:PostprocessorName
Controllable:No
Description:Inlet area as a postprocessor
- displacementsThe displacements
C++ Type:std::vector<VariableName>
Controllable:No
Description:The displacements
- mdot_ppPostprocessor with the inlet mass flow rate
C++ Type:PostprocessorName
Controllable:No
Description:Postprocessor with the inlet mass flow rate
- rhoDensity functor
C++ Type:MooseFunctorName
Controllable:No
Description:Density functor
- scaling_factor1To scale the velocity
Default:1
C++ Type:double
Controllable:No
Description:To scale the velocity
- velocity_ppPostprocessor with the inlet velocity
C++ Type:PostprocessorName
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>
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>
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>
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
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
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>
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
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
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
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.