DiracHX

construction:Undocumented Class

The DiracHX has not been documented. The content listed below should be used as a starting point for documenting the class, which includes the typical automatic documentation associated with a MooseObject; however, what is contained is ultimately determined by what is necessary to make the documentation clear for users.

Overview

Example Input File Syntax

Input Parameters

pointThe x,y,z coordinates of the point
C++ Type:libMesh::Point
Unit:(no unit assumed)
Controllable:No
Description:The x,y,z coordinates of the point
powerHX Power in Watts
C++ Type:double
Unit:(no unit assumed)
Controllable:Yes
Description:HX Power in Watts
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

allow_moving_sourcesFalseIf true, allow Dirac sources to move, even if the mesh does not move, during the simulation.
Default:False
C++ Type:bool
Unit:(no unit assumed)
Controllable:No
Description:If true, allow Dirac sources to move, even if the mesh does not move, during the simulation.
blockThe list of blocks (ids or names) that this object will be applied
C++ Type:std::vector<SubdomainName>
Unit:(no unit assumed)
Controllable:No
Description:The list of blocks (ids or names) that this object will be applied
point_not_found_behaviorIGNOREBy default (IGNORE), it is ignored if an added point cannot be located in the specified subdomains. If this option is set to ERROR, this situation will result in an error. If this option is set to WARNING, then a warning will be issued.
Default:IGNORE
C++ Type:MooseEnum
Unit:(no unit assumed)
Options:ERROR, WARNING, IGNORE
Controllable:No
Description:By default (IGNORE), it is ignored if an added point cannot be located in the specified subdomains. If this option is set to ERROR, this situation will result in an error. If this option is set to WARNING, then a warning will be issued.
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.
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.
drop_duplicate_pointsTrueBy default points added to a DiracKernel are dropped if a point at the same locationhas been added before. If this option is set to false duplicate points are retainedand contribute to residual and Jacobian.
Default:True
C++ Type:bool
Unit:(no unit assumed)
Controllable:No
Description:By default points added to a DiracKernel are dropped if a point at the same locationhas been added before. If this option is set to false duplicate points are retainedand contribute to residual and Jacobian.
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
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

(problems/LOSCA/HXFailure/sub.i)
(problems/publication_level_cases/LOSCA/HXFail/sub.i)
(problems/LOSCA/sub.i)
(problems/publication_level_cases/LOSCA/sub.i)
(tests/diracHX/sub.i)

(problems/LOSCA/HXFailure/sub.i)

flow_velocity=21.7 # cm/s. See MSRE-properties.ods
nt_scale=1e13
ini_temp=922
diri_temp=922

[GlobalParams]
  num_groups = 0
  num_precursor_groups = 6
  use_exp_form = false
  group_fluxes = ''
  temperature = temp
  sss2_input = false
  pre_concs = 'pre1 pre2 pre3 pre4 pre5 pre6'
  # account_delayed = true
[]

[Mesh]
  file = '../sub.e'
[]


[Variables]
  [./temp]
    scaling = 1e-4
    initial_from_file_var = temp
    initial_from_file_timestep = LATEST
    family = MONOMIAL
    order = CONSTANT
  [../]
[]

[Precursors]
 [./core]
  var_name_base = pre
  outlet_boundaries = 'right'
  u_def = ${flow_velocity}
  v_def = 0
  w_def = 0
  nt_exp_form = false
  family = MONOMIAL
  order = CONSTANT
  init_from_file = true
  loop_precursors = true
  multi_app = loopApp
  is_loopapp = true
  inlet_boundaries = left
 [../]
[]

[Kernels]
  # Temperature
  [./temp_time_derivative]
    type = MatINSTemperatureTimeDerivative
    variable = temp
  [../]
  # [./temp_source_fuel]
  #   type = TransientFissionHeatSource
  #   variable = temp
  #   nt_scale=${nt_scale}
  # [../]
  # [./temp_source_mod]
  #   type = GammaHeatSource
  #   variable = temp
  #   gamma = .0144 # Cammi .0144
  #   block = 'moder'
  #   average_fission_heat = 'average_fission_heat'
  # [../]
  # [./temp_diffusion]
  #   type = MatDiffusion
  #   diffusivity = 'k'
  #   variable = temp
  # [../]
  # [./temp_advection_fuel]
  #   type = ConservativeTemperatureAdvection
  #   velocity = '${flow_velocity} 0 0'
  #   variable = temp
  # [../]
[]

[DGKernels]
  [./temp_adv]
    type = DGTemperatureAdvection
    variable = temp
    velocity = '${flow_velocity} 0 0'
  [../]
[]


[DiracKernels]
  [./heat_exchanger]
    type = DiracHX
    variable = temp
    point = '250 0 0'
    power = 4e3
  [../]
[]


[BCs]
  [./fuel_bottoms_looped]
    boundary = 'left'
    type = PostprocessorTemperatureInflowBC
    postprocessor = coreEndTemp
    variable = temp
    uu = ${flow_velocity}
  [../]
  # [./diri]
  #   boundary = 'left'
  #   type = DirichletBC
  #   variable = temp
  #   value = 930
  # [../]
  [./temp_advection_outlet]
    boundary = 'right'
    type = TemperatureOutflowBC
    variable = temp
    velocity = '${flow_velocity} 0 0'
  [../]
[]

[Functions]
  [./heatRemovalFcn]
    type = ParsedFunction
    value = '4e3 * ( 1 - tanh( (t-5) ) )' # start losing cooling at t=5s
  [../]
[]

[Controls]
  [./hxFuncCtrl]
    type = RealFunctionControl
    parameter = '*/*/power'
    function = 'heatRemovalFcn'
    execute_on = 'timestep_begin'
  [../]
[]

[Materials]
  [./fuel]
    type = GenericMoltresMaterial
    property_tables_root = '../../../property_file_dir/newt_msre_fuel_'
    interp_type = 'spline'
    prop_names = 'k cp'
    prop_values = '.0553 1967' # Robertson MSRE technical report @ 922 K
  [../]
  [./rho_fuel]
    type = DerivativeParsedMaterial
    f_name = rho
    function = '2.146e-3 * exp(-1.8 * 1.18e-4 * (temp - 922))'
    args = 'temp'
    derivative_order = 1
  [../]
[]

[Executioner]
  type = Transient
  end_time = 10000

  nl_rel_tol = 1e-6
  nl_abs_tol = 1e-6

  solve_type = 'PJFNK'
  petsc_options = '-snes_converged_reason -ksp_converged_reason -snes_linesearch_monitor'
  petsc_options_iname = '-pc_type'
  petsc_options_value = 'lu'
  line_search = 'none'

  nl_max_its = 30
  l_max_its = 100

  dtmin = 1e-5
  # dtmax = 1
  # dt = 1e-3
  [./TimeStepper]
    type = IterationAdaptiveDT
    dt = 1e-3
    cutback_factor = 0.4
    growth_factor = 1.2
    optimal_iterations = 20
  [../]
[]

[Preconditioning]
  [./SMP]
    type = SMP
    full = true
  [../]
[]

[Postprocessors]
  [./temp_fuel]
    type = ElementAverageValue
    variable = temp
    outputs = 'exodus console'
  [../]
  [./loopEndTemp]
    type = SideAverageValue
    variable = temp
    boundary = 'right'
  [../]
  [./coreEndTemp]
    type = Receiver
  [../]
[]

[Outputs]
  perf_graph = true
  print_linear_residuals = true
  [./exodus]
    type = Exodus
    file_base = 'sub'
    execute_on = 'timestep_begin'
  [../]
[]

[Debug]
  show_var_residual_norms = true
[]

(problems/publication_level_cases/LOSCA/HXFail/sub.i)

flow_velocity=21.7 # cm/s. See MSRE-properties.ods
nt_scale=1e13
ini_temp=922
diri_temp=922

[GlobalParams]
  num_groups = 0
  num_precursor_groups = 6
  use_exp_form = false
  group_fluxes = ''
  temperature = temp
  sss2_input = false
  pre_concs = 'pre1 pre2 pre3 pre4 pre5 pre6'
  # account_delayed = true
[]

[Mesh]
  file = '../sub.e'
[]


[Variables]
  [./temp]
    scaling = 1e-4
    initial_from_file_var = temp
    initial_from_file_timestep = LATEST
    family = MONOMIAL
    order = CONSTANT
  [../]
[]

[Precursors]
 [./core]
  var_name_base = pre
  outlet_boundaries = 'right'
  u_def = ${flow_velocity}
  v_def = 0
  w_def = 0
  nt_exp_form = false
  family = MONOMIAL
  order = CONSTANT
  init_from_file = true
 [../]
[]

[Kernels]
  # Temperature
  [./temp_time_derivative]
    type = MatINSTemperatureTimeDerivative
    variable = temp
  [../]
  # [./temp_source_fuel]
  #   type = TransientFissionHeatSource
  #   variable = temp
  #   nt_scale=${nt_scale}
  # [../]
  # [./temp_source_mod]
  #   type = GammaHeatSource
  #   variable = temp
  #   gamma = .0144 # Cammi .0144
  #   block = 'moder'
  #   average_fission_heat = 'average_fission_heat'
  # [../]
  # [./temp_diffusion]
  #   type = MatDiffusion
  #   diffusivity = 'k'
  #   variable = temp
  # [../]
  # [./temp_advection_fuel]
  #   type = ConservativeTemperatureAdvection
  #   velocity = '${flow_velocity} 0 0'
  #   variable = temp
  # [../]
[]

[DGKernels]
  [./temp_adv]
    type = DGTemperatureAdvection
    variable = temp
    velocity = '${flow_velocity} 0 0'
  [../]
[]


[DiracKernels]
  [./heat_exchanger]
    type = DiracHX
    variable = temp
    point = '250 0 0'
    power = 4e3
  [../]
[]


[BCs]
  [./fuel_bottoms_looped]
    boundary = 'left'
    type = PostprocessorTemperatureInflowBC
    postprocessor = coreEndTemp
    variable = temp
    uu = ${flow_velocity}
  [../]
  # [./diri]
  #   boundary = 'left'
  #   type = DirichletBC
  #   variable = temp
  #   value = 930
  # [../]
  [./temp_advection_outlet]
    boundary = 'right'
    type = TemperatureOutflowBC
    variable = temp
    velocity = '${flow_velocity} 0 0'
  [../]
[]

[Functions]
  [./heatRemovalFcn]
    type = ParsedFunction
    value = '4e3 * ( 1 - tanh( (t-5) ) )' # start losing cooling at t=5s
  [../]
[]

[Controls]
  [./hxFuncCtrl]
    type = RealFunctionControl
    parameter = '*/*/power'
    function = 'heatRemovalFcn'
    execute_on = 'timestep_begin'
  [../]
[]

[Materials]
  [./fuel]
    type = GenericMoltresMaterial
    property_tables_root = '../../../../property_file_dir/newt_msre_fuel_'
    interp_type = 'spline'
    prop_names = 'k cp'
    prop_values = '.0553 1967' # Robertson MSRE technical report @ 922 K
  [../]
  [./rho_fuel]
    type = DerivativeParsedMaterial
    f_name = rho
    function = '2.146e-3 * exp(-1.8 * 1.18e-4 * (temp - 922))'
    args = 'temp'
    derivative_order = 1
  [../]
[]

[Executioner]
  type = Transient
  end_time = 10000

  nl_rel_tol = 1e-6
  nl_abs_tol = 1e-6

  solve_type = 'PJFNK'
  petsc_options = '-snes_converged_reason -ksp_converged_reason -snes_linesearch_monitor'
  petsc_options_iname = '-pc_type'
  petsc_options_value = 'lu'
  line_search = 'none'

  nl_max_its = 30
  l_max_its = 100

  dtmin = 1e-5
  # dtmax = 1
  # dt = 1e-3
  [./TimeStepper]
    type = IterationAdaptiveDT
    dt = 1e-3
    cutback_factor = 0.4
    growth_factor = 1.2
    optimal_iterations = 20
  [../]
[]

[Preconditioning]
  [./SMP]
    type = SMP
    full = true
  [../]
[]

[Postprocessors]
  [./temp_fuel]
    type = ElementAverageValue
    variable = temp
    outputs = 'exodus console'
  [../]
  [./loopEndTemp]
    type = SideAverageValue
    variable = temp
    boundary = 'right'
  [../]
  [./coreEndTemp]
    type = Receiver
  [../]
[]

[Outputs]
  perf_graph = true
  print_linear_residuals = true
  [./exodus]
    type = Exodus
    file_base = 'sub'
    execute_on = 'timestep_begin'
  [../]
[]

[Debug]
  show_var_residual_norms = true
[]

(problems/LOSCA/sub.i)

flow_velocity=21.7 # cm/s. See MSRE-properties.ods
nt_scale=1e13
ini_temp=922
diri_temp=922

[GlobalParams]
  num_groups = 0
  num_precursor_groups = 6
  use_exp_form = false
  group_fluxes = ''
  temperature = temp
  sss2_input = false
  pre_concs = 'pre1 pre2 pre3 pre4 pre5 pre6'
  # account_delayed = true
[]

[Mesh]
  type = GeneratedMesh
  dim = 1
  nx = 600
  xmax = 500
  elem_type = EDGE2
[../]

[Variables]
  [./temp]
    initial_condition = 930 #approx steady outlet of other problem
    scaling = 1e-4
    family = MONOMIAL
    order = CONSTANT
  [../]
[]

[Precursors]
 [./core]
  var_name_base = pre
  outlet_boundaries = 'right'
  u_def = ${flow_velocity}
  v_def = 0
  w_def = 0
  nt_exp_form = false
  family = MONOMIAL
  order = CONSTANT
  loop_precursors = true
  multi_app = loopApp
  is_loopapp = true
  inlet_boundaries = left

 [../]
[]

[Kernels]
  # Temperature
  [./temp_time_derivative]
    type = MatINSTemperatureTimeDerivative
    variable = temp
  [../]
  # [./temp_source_fuel]
  #   type = TransientFissionHeatSource
  #   variable = temp
  #   nt_scale=${nt_scale}
  # [../]
  # [./temp_source_mod]
  #   type = GammaHeatSource
  #   variable = temp
  #   gamma = .0144 # Cammi .0144
  #   block = 'moder'
  #   average_fission_heat = 'average_fission_heat'
  # [../]
  # [./temp_diffusion]
  #   type = MatDiffusion
  #   diffusivity = 'k'
  #   variable = temp
  # [../]
  # [./temp_advection_fuel]
  #   type = ConservativeTemperatureAdvection
  #   velocity = '${flow_velocity} 0 0'
  #   variable = temp
  # [../]
[]

[DGKernels]
  [./temp_adv]
    type = DGTemperatureAdvection
    variable = temp
    velocity = '${flow_velocity} 0 0'
  [../]
[]


[DiracKernels]
  [./heat_exchanger]
    type = DiracHX
    variable = temp
    power = 4e3 # see controls
    point = '250 0 0'
  [../]
[]


[BCs]
  [./fuel_bottoms_looped]
    boundary = 'left'
    type = PostprocessorTemperatureInflowBC
    postprocessor = coreEndTemp
    variable = temp
    uu = ${flow_velocity}
  [../]
  # [./diri]
  #   boundary = 'left'
  #   type = DirichletBC
  #   variable = temp
  #   value = 930
  # [../]
  [./temp_advection_outlet]
    boundary = 'right'
    type = TemperatureOutflowBC
    variable = temp
    velocity = '${flow_velocity} 0 0'
  [../]
[]

[Materials]
  [./fuel]
    type = GenericMoltresMaterial
    property_tables_root = '../../property_file_dir/newt_msre_fuel_'
    interp_type = 'spline'
    prop_names = 'k cp'
    prop_values = '.0553 1967' # Robertson MSRE technical report @ 922 K
  [../]
  [./rho_fuel]
    type = DerivativeParsedMaterial
    f_name = rho
    function = '2.146e-3 * exp(-1.8 * 1.18e-4 * (temp - 922))'
    args = 'temp'
    derivative_order = 1
  [../]
[]

[Executioner]
  type = Transient
  end_time = 10000

  nl_rel_tol = 1e-6
  nl_abs_tol = 1e-6

  solve_type = 'PJFNK'
  petsc_options = '-snes_converged_reason -ksp_converged_reason -snes_linesearch_monitor'
  petsc_options_iname = '-pc_type'
  petsc_options_value = 'lu'
  line_search = 'none'

  nl_max_its = 30
  l_max_its = 100

  dtmin = 1e-5
  # dtmax = 1
  # dt = 1e-3
  [./TimeStepper]
    type = IterationAdaptiveDT
    dt = 1e-3
    cutback_factor = 0.4
    growth_factor = 1.2
    optimal_iterations = 20
  [../]
[]

[Preconditioning]
  [./SMP]
    type = SMP
    full = true
  [../]
[]

[Postprocessors]
  [./temp_fuel]
    type = ElementAverageValue
    variable = temp
    outputs = 'exodus console'
  [../]
  [./loopEndTemp]
    type = SideAverageValue
    variable = temp
    boundary = 'right'
  [../]
  [./coreEndTemp]
    type = Receiver
  [../]
[]

[Outputs]
  perf_graph = true
  print_linear_residuals = true
  [./exodus]
    type = Exodus
    file_base = 'sub'
    execute_on = 'timestep_begin'
  [../]
[]

[Debug]
  show_var_residual_norms = true
[]

# connect inlet and outlet to multiapp
# [Transfers]
#   [./to_core]
#     type = MultiAppPostprocessorTransfer
#     multi_app = MoltresApp
#     from_postprocessor = loopEndTemp
#     to_postprocessor = inlet_mean_temp
#     direction = to_multiapp
#   [../]
#   [./from_core]
#     type = MultiAppPostprocessorTransfer
#     multi_app = MoltresApp
#     from_postprocessor = coreEndTemp
#     to_postprocessor = coreEndTemp
#     direction = to_multiapp
#   [../]
# []

(problems/publication_level_cases/LOSCA/sub.i)

flow_velocity=21.7 # cm/s. See MSRE-properties.ods
nt_scale=1e13
ini_temp=922
diri_temp=922

[GlobalParams]
  num_groups = 0
  num_precursor_groups = 6
  use_exp_form = false
  group_fluxes = ''
  temperature = temp
  sss2_input = false
  pre_concs = 'pre1 pre2 pre3 pre4 pre5 pre6'
  # account_delayed = true
[]

[Mesh]
  type = GeneratedMesh
  dim = 1
  nx = 600
  xmax = 500
  elem_type = EDGE2
[../]

[Variables]
  [./temp]
    initial_condition = 930 #approx steady outlet of other problem
    scaling = 1e-4
    family = MONOMIAL
    order = CONSTANT
  [../]
[]

[Precursors]
 [./core]
  var_name_base = pre
  outlet_boundaries = 'right'
  u_def = ${flow_velocity}
  v_def = 0
  w_def = 0
  nt_exp_form = false
  family = MONOMIAL
  order = CONSTANT
 [../]
[]

[Kernels]
  # Temperature
  [./temp_time_derivative]
    type = MatINSTemperatureTimeDerivative
    variable = temp
  [../]
  # [./temp_source_fuel]
  #   type = TransientFissionHeatSource
  #   variable = temp
  #   nt_scale=${nt_scale}
  # [../]
  # [./temp_source_mod]
  #   type = GammaHeatSource
  #   variable = temp
  #   gamma = .0144 # Cammi .0144
  #   block = 'moder'
  #   average_fission_heat = 'average_fission_heat'
  # [../]
  # [./temp_diffusion]
  #   type = MatDiffusion
  #   diffusivity = 'k'
  #   variable = temp
  # [../]
  # [./temp_advection_fuel]
  #   type = ConservativeTemperatureAdvection
  #   velocity = '${flow_velocity} 0 0'
  #   variable = temp
  # [../]
[]

[DGKernels]
  [./temp_adv]
    type = DGTemperatureAdvection
    variable = temp
    velocity = '${flow_velocity} 0 0'
  [../]
[]


[DiracKernels]
  [./heat_exchanger]
    type = DiracHX
    variable = temp
    power = 4e3 # see controls
    point = '250 0 0'
  [../]
[]


[BCs]
  [./fuel_bottoms_looped]
    boundary = 'left'
    type = PostprocessorTemperatureInflowBC
    postprocessor = coreEndTemp
    variable = temp
    uu = ${flow_velocity}
  [../]
  # [./diri]
  #   boundary = 'left'
  #   type = DirichletBC
  #   variable = temp
  #   value = 930
  # [../]
  [./temp_advection_outlet]
    boundary = 'right'
    type = TemperatureOutflowBC
    variable = temp
    velocity = '${flow_velocity} 0 0'
  [../]
[]

[Materials]
  [./fuel]
    type = GenericMoltresMaterial
    property_tables_root = '../../../property_file_dir/newt_msre_fuel_'
    interp_type = 'spline'
    prop_names = 'k cp'
    prop_values = '.0553 1967' # Robertson MSRE technical report @ 922 K
  [../]
  [./rho_fuel]
    type = DerivativeParsedMaterial
    f_name = rho
    function = '2.146e-3 * exp(-1.8 * 1.18e-4 * (temp - 922))'
    args = 'temp'
    derivative_order = 1
  [../]
[]

[Executioner]
  type = Transient
  end_time = 10000

  nl_rel_tol = 1e-6
  nl_abs_tol = 1e-6

  solve_type = 'PJFNK'
  petsc_options = '-snes_converged_reason -ksp_converged_reason -snes_linesearch_monitor'
  petsc_options_iname = '-pc_type'
  petsc_options_value = 'lu'
  line_search = 'none'

  nl_max_its = 30
  l_max_its = 100

  dtmin = 1e-5
  # dtmax = 1
  # dt = 1e-3
  [./TimeStepper]
    type = IterationAdaptiveDT
    dt = 1e-3
    cutback_factor = 0.4
    growth_factor = 1.2
    optimal_iterations = 20
  [../]
[]

[Preconditioning]
  [./SMP]
    type = SMP
    full = true
  [../]
[]

[Postprocessors]
  [./temp_fuel]
    type = ElementAverageValue
    variable = temp
    outputs = 'exodus console'
  [../]
  [./loopEndTemp]
    type = SideAverageValue
    variable = temp
    boundary = 'right'
  [../]
  [./coreEndTemp]
    type = Receiver
  [../]
[]

[Outputs]
  perf_graph = true
  print_linear_residuals = true
  [./exodus]
    type = Exodus
    file_base = 'sub'
    execute_on = 'timestep_begin'
  [../]
[]

[Debug]
  show_var_residual_norms = true
[]

# connect inlet and outlet to multiapp
# [Transfers]
#   [./to_core]
#     type = MultiAppPostprocessorTransfer
#     multi_app = MoltresApp
#     from_postprocessor = loopEndTemp
#     to_postprocessor = inlet_mean_temp
#     direction = to_multiapp
#   [../]
#   [./from_core]
#     type = MultiAppPostprocessorTransfer
#     multi_app = MoltresApp
#     from_postprocessor = coreEndTemp
#     to_postprocessor = coreEndTemp
#     direction = to_multiapp
#   [../]
# []

(tests/diracHX/sub.i)

# test that diracHX, DG kernels for heat transport are working
# test does a sinusoid heat removal in the loop
# Courant # = 0.5

flow_velocity = 0.5 # cm/s. See MSRE-properties.ods

[Mesh]
  type = GeneratedMesh
  dim = 1
  nx = 100
  xmax = 100
  elem_type = EDGE2
[]

[Variables]
  [temp]
    initial_condition = 930 #approx steady outlet of other problem
    scaling = 1e-4
    family = MONOMIAL
    order = CONSTANT
  []
[]

[Kernels]
  # Temperature
  [temp_time_derivative]
    type = MatINSTemperatureTimeDerivative
    variable = temp
  []
[]

[DGKernels]
  [temp_adv]
    type = DGTemperatureAdvection
    variable = temp
    velocity = '${flow_velocity} 0 0'
  []
[]

[DiracKernels]
  [heat_exchanger]
    type = DiracHX
    variable = temp
    power = 100 # see controls
    point = '50 0 0'
  []
[]

[BCs]
  [fuel_bottoms_looped]
    boundary = 'left'
    type = TemperatureInflowBC
    variable = temp
    uu = ${flow_velocity}
    vv = 0
    ww = 0
    inlet_conc = 930
  []
  [temp_advection_outlet]
    boundary = 'right'
    type = TemperatureOutflowBC
    variable = temp
    velocity = '${flow_velocity} 0 0'
  []
[]

[Functions]
  [heatRemovalFcn]
    type = ParsedFunction
    expression = '1e2 + 1e2 * sin(t/5) ' # start losing cooling at t=50s
  []
[]

[Controls]
  [hxFuncCtrl]
    type = RealFunctionControl
    parameter = DiracKernels/heat_exchanger/power
    function = heatRemovalFcn
    execute_on = 'initial timestep_begin'
  []
[]

[Materials]
  [fuel]
    type = GenericConstantMaterial
    prop_names = 'k cp'
    prop_values = '.0553 1967' # Robertson MSRE technical report @ 922 K
  []
  [rho_fuel]
    type = DerivativeParsedMaterial
    property_name = rho
    expression = '2.146e-3 * exp(-1.8 * 1.18e-4 * (temp - 922))'
    coupled_variables = 'temp'
    derivative_order = 1
  []
[]

[Executioner]
  type = Transient
  end_time = 100

  nl_rel_tol = 1e-8
  nl_abs_tol = 1e-8
  scheme = crank-nicolson

  solve_type = 'NEWTON'
  petsc_options = '-snes_converged_reason -ksp_converged_reason -snes_linesearch_monitor'
  petsc_options_iname = '-pc_type -sub_pc_type -pc_asm_overlap -sub_ksp_type -snes_linesearch_minlambda'
  petsc_options_value = 'asm      lu           1               preonly       1e-3'

  [TimeStepper]
    type = ConstantDT
    dt = 1
  []
[]

[Preconditioning]
  [SMP]
    type = SMP
    full = true
  []
[]

[Postprocessors]
  [temp_fuel]
    type = ElementAverageValue
    variable = temp
    outputs = 'exodus console'
  []
  [loopEndTemp]
    type = SideAverageValue
    variable = temp
    boundary = 'right'
  []
[]

[Outputs]
  perf_graph = true
  print_linear_residuals = true
  [exodus]
    type = Exodus
    file_base = 'sub'
    execute_on = 'timestep_begin'
  []
[]

[Debug]
  show_var_residual_norms = true
[]

Overview
Example Input File Syntax
Input Parameters
Input Files