SakiyamaEnergySecondaryElectronBC

Kinetic secondary electron for mean electron energy boundary condition (Based on Sakiyama and Graves (2007))

Overview

SakiyamaEnergySecondaryElectronBC accounts for the mean electron energy density of secondary electrons induced by an ion flux outflow boundary condition. SakiyamaEnergySecondaryElectronBC assumes the electrostatic approximation for the electric field.

The ion induced secondary electron mean energy density outflow is defined as

Where is the flux normal to the boundary, is the normal vector of the boundary, is the mobility coefficient, is the mean energy density, is the ion density, is the secondary electron coefficient, and is the electric potential. is defined such that the outflow is only non-zero when the drift velocity is directed towards the wall and zero otherwise. When converting the density to log form and applying a scaling factor of the mesh, the strong form for SakiyamaEnergySecondaryElectronBC is defined as

Where is the molar density of the species in log form and is the scaling factor of the mesh.

Example Input File Syntax

[BCs]
  [mean_en_Ar+_second_emissions]
    type = SakiyamaEnergySecondaryElectronBC
    variable = mean_en
    electrons = em
    ions = Ar+
    potential = potential_ion
    Tse_equal_Te = true
    emission_coeffs = 0.01
    boundary = 'Top_Electrode Bottom_Electrode Top_Insulator Bottom_Insulator Walls'
    position_units = ${dom0Scale}
  []
[]
(test/tests/DriftDiffusionAction/2D_RF_Plasma_actions.i)

Input Parameters

  • Tse_equal_TeFalseThe secondary electron temperature equal the electron temperature in eV

    Default:False

    C++ Type:bool

    Unit:(no unit assumed)

    Controllable:No

    Description:The secondary electron temperature equal the electron temperature in eV

  • 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

  • electronsThe electron density in log form

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

    Unit:(no unit assumed)

    Controllable:No

    Description:The electron density in log form

  • emission_coeffsThe secondary electron emission coefficient for each ion provided in `ions`

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

    Unit:(no unit assumed)

    Controllable:No

    Description:The secondary electron emission coefficient for each ion provided in `ions`

  • ionsA list of ion densities in log form

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

    Unit:(no unit assumed)

    Controllable:No

    Description:A list of ion densities in log form

  • position_unitsUnits of position.

    C++ Type:double

    Unit:(no unit assumed)

    Controllable:No

    Description:Units of position.

  • potentialThe electric potential

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

    Unit:(no unit assumed)

    Controllable:No

    Description:The electric potential

  • variableThe name of the variable that this residual object operates on

    C++ Type:NonlinearVariableName

    Unit:(no unit assumed)

    Controllable:No

    Description:The name of the variable that this residual object operates on

Required Parameters

  • displacementsThe displacements

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

    Unit:(no unit assumed)

    Controllable:No

    Description:The displacements

  • prop_getter_suffixAn optional suffix parameter that can be appended to any attempt to retrieve/get material properties. The suffix will be prepended with a '_' character.

    C++ Type:MaterialPropertyName

    Unit:(no unit assumed)

    Controllable:No

    Description:An optional suffix parameter that can be appended to any attempt to retrieve/get material properties. The suffix will be prepended with a '_' character.

  • secondary_electron_energy1The secondary electron temperature in eV

    Default:1

    C++ Type:double

    Unit:(no unit assumed)

    Controllable:No

    Description:The secondary electron temperature in eV

  • use_interpolated_stateFalseFor the old and older state use projected material properties interpolated at the quadrature points. To set up projection use the ProjectedStatefulMaterialStorageAction.

    Default:False

    C++ Type:bool

    Unit:(no unit assumed)

    Controllable:No

    Description:For the old and older state use projected material properties interpolated at the quadrature points. To set up projection use the ProjectedStatefulMaterialStorageAction.

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.

  • 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<AuxVariableName>

    Unit:(no unit assumed)

    Controllable:No

    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.)

  • 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

  • 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<AuxVariableName>

    Unit:(no unit assumed)

    Controllable:No

    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.)

  • seed0The seed for the master random number generator

    Default:0

    C++ Type:unsigned int

    Unit:(no unit assumed)

    Controllable:No

    Description:The seed for the master random number generator

  • 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

Input Files

References

  1. Yukinori Sakiyama and David B Graves. Nonthermal atmospheric rf plasma in one-dimensional spherical coordinates: asymmetric sheath structure and the discharge mechanism. Journal of applied physics, 2007. doi:https://doi.org/10.1063/1.2715745.[BibTeX]