SCMDetailedTriPinMeshGenerator

Creates a detailed mesh of fuel pins in a triangular lattice arrangement

Overview

This is a mesh generator used for visualization purposes only. It is part of an input file that creates a 3D realistic mesh of the pins in a triangular lattice arrangement. This input file has a Problem block with the NoSolveProblem because it is not used to perform any calculations. It is used to create a detailed 3D mesh that the SCM solution gets projected on. Last, "input" is a parameter that takes the name of an object of type SCMDetailedTriSubChannelMeshGenerator so the user must be careful to define consistent parameters across both MeshGenerators. The center of the mesh is the origin.

Input Parameters

heated_lengthHeated length [m]
C++ Type:double
Unit:(no unit assumed)
Controllable:No
Description:Heated length [m]
inputThe corresponding subchannel mesh
C++ Type:MeshGeneratorName
Controllable:No
Description:The corresponding subchannel mesh
n_cellsThe number of cells in the axial direction
C++ Type:unsigned int
Controllable:No
Description:The number of cells in the axial direction
nringsNumber of fuel Pin rings per assembly [-]
C++ Type:unsigned int
Controllable:No
Description:Number of fuel Pin rings per assembly [-]
pin_diameterRod diameter [m]
C++ Type:double
Unit:(no unit assumed)
Controllable:No
Description:Rod diameter [m]
pitchPitch [m]
C++ Type:double
Unit:(no unit assumed)
Controllable:No
Description:Pitch [m]

Required Parameters

block_id1Block ID used for the mesh subdomain.
Default:1
C++ Type:unsigned int
Controllable:No
Description:Block ID used for the mesh subdomain.
num_radial_parts16Number of radial parts (must be at least 4).
Default:16
C++ Type:unsigned int
Controllable:No
Description:Number of radial parts (must be at least 4).
unheated_length_entry0Unheated length at entry [m]
Default:0
C++ Type:double
Unit:(no unit assumed)
Controllable:No
Description:Unheated length at entry [m]
unheated_length_exit0Unheated length at exit [m]
Default:0
C++ Type:double
Unit:(no unit assumed)
Controllable:No
Description:Unheated length at exit [m]

Optional Parameters

enableTrueSet the enabled status of the MooseObject.
Default:True
C++ Type:bool
Controllable:No
Description:Set the enabled status of the MooseObject.
save_with_nameKeep the mesh from this mesh generator in memory with the name specified
C++ Type:std::string
Controllable:No
Description:Keep the mesh from this mesh generator in memory with the name specified

Advanced Parameters

nemesisFalseWhether or not to output the mesh file in the nemesisformat (only if output = true)
Default:False
C++ Type:bool
Controllable:No
Description:Whether or not to output the mesh file in the nemesisformat (only if output = true)
outputFalseWhether or not to output the mesh file after generating the mesh
Default:False
C++ Type:bool
Controllable:No
Description:Whether or not to output the mesh file after generating the mesh
show_infoFalseWhether or not to show mesh info after generating the mesh (bounding box, element types, sidesets, nodesets, subdomains, etc)
Default:False
C++ Type:bool
Controllable:No
Description:Whether or not to show mesh info after generating the mesh (bounding box, element types, sidesets, nodesets, subdomains, etc)

Debugging Parameters

Input Files

(modules/combined/test/tests/subchannel_thm_coupling/3D.i)
(modules/subchannel/examples/MultiApp/3d.i)
(modules/subchannel/validation/EBR-II/3d_SCM_SS.i)
(modules/subchannel/validation/EBR-II/3d_SCM_TR.i)
(modules/subchannel/validation/areva_FCTF/3D.i)
(modules/subchannel/test/tests/mesh/detailed_tri_pin_mesh/coords.i)

(modules/combined/test/tests/subchannel_thm_coupling/3D.i)

###################################################
# Geometric parameters
###################################################
n_cells = 25
n_rings = 3
fuel_pin_pitch = 7.26e-3
fuel_pin_diameter =  5.84e-3
inner_duct_in = 3.41e-2
heated_length = 1.0
###################################################
[TriSubChannelMesh]
  [subchannel]
    type = SCMDetailedTriSubChannelMeshGenerator
    nrings = ${n_rings}
    n_cells = ${n_cells}
    flat_to_flat = ${inner_duct_in}
    heated_length = ${heated_length}
    pin_diameter = ${fuel_pin_diameter}
    pitch = ${fuel_pin_pitch}
  []

  [fuel_pins]
    type = SCMDetailedTriPinMeshGenerator
    input = subchannel
    nrings = ${n_rings}
    n_cells = ${n_cells}
    pin_diameter = ${fuel_pin_diameter}
    heated_length = ${heated_length}
    pitch = ${fuel_pin_pitch}
  []
[]

[AuxVariables]
  [mdot]
    block = subchannel
  []
  [SumWij]
    block = subchannel
  []
  [P]
    block = subchannel
  []
  [DP]
    block = subchannel
  []
  [h]
    block = subchannel
  []
  [T]
    block = subchannel
  []
  [rho]
    block = subchannel
  []
  [S]
    block = subchannel
  []
  [Sij]
    block = subchannel
  []
  [w_perim]
    block = subchannel
  []
  [mu]
    block = subchannel
  []
  [q_prime]
    block = fuel_pins
  []
  [Tpin]
    block = fuel_pins
  []
  [Dpin]
    block = fuel_pins
  []
[]

[Problem]
  type = NoSolveProblem
[]

[Outputs]
  exodus = true
[]

[Executioner]
  type = Steady
[]

(modules/subchannel/examples/MultiApp/3d.i)

# Following Advanced Burner Test Reactor Preconceptual Design Report
# Available at: https://www.ne.anl.gov/eda/ABTR_1cv2_ws.pdf

###################################################
# Geometric parameters
###################################################

# units are cm - do not forget to convert to meter
scale_factor = 0.01
fuel_element_pitch = ${fparse 14.598*scale_factor}
inter_assembly_gap = ${fparse 0.4*scale_factor}
duct_thickness = ${fparse 0.3*scale_factor}
fuel_pin_pitch = ${fparse 0.904*scale_factor}
fuel_pin_diameter= ${fparse 0.8*scale_factor}
# wire_z_spacing = ${fparse 20.32*scale_factor}
# wire_diameter = ${fparse 0.103*scale_factor}

# Reduced height for convenience
length_entry_fuel = '${fparse 20*scale_factor}'
length_heated_fuel = '${fparse 40*scale_factor}'
length_outlet_fuel = '${fparse 20*scale_factor}'
height = ${fparse length_entry_fuel+length_heated_fuel+length_outlet_fuel}
# orifice_plate_height = ${fparse 5*scale_factor}
duct_outside = ${fparse fuel_element_pitch - inter_assembly_gap}
duct_inside = ${fparse duct_outside - 2 * duct_thickness}
n_rings = 9

n_cells = 100

[Mesh]
  [subchannel]
    type = SCMDetailedTriSubChannelMeshGenerator
    nrings = '${fparse n_rings}'
    n_cells = ${n_cells}
    flat_to_flat = '${fparse duct_inside}'
    unheated_length_entry = '${fparse length_entry_fuel}'
    heated_length = '${fparse length_heated_fuel}'
    unheated_length_exit = '${fparse length_outlet_fuel}'
    pin_diameter = '${fparse fuel_pin_diameter}'
    pitch = '${fparse fuel_pin_pitch}'
  []

  [fuel_pins]
    type = SCMDetailedTriPinMeshGenerator
    input = subchannel
    nrings = '${fparse n_rings}'
    n_cells = ${n_cells}
    unheated_length_entry = '${fparse length_entry_fuel}'
    heated_length = '${fparse length_heated_fuel}'
    unheated_length_exit = '${fparse length_outlet_fuel}'
    pitch = '${fparse fuel_pin_pitch}'
    pin_diameter = '${fparse fuel_pin_diameter}'
  []
[]

[AuxVariables]
  [mdot]
    block = subchannel
  []
  [SumWij]
    block = subchannel
  []
  [P]
    block = subchannel
  []
  [DP]
    block = subchannel
  []
  [h]
    block = subchannel
  []
  [T]
    block = subchannel
  []
  [rho]
    block = subchannel
  []
  [mu]
    block = subchannel
  []
  [S]
    block = subchannel
  []
  [w_perim]
    block = subchannel
  []
  [q_prime]
    block = fuel_pins
  []
  [Tpin]
    block = fuel_pins
  []
  [Dpin]
    block = fuel_pins
  []
[]

[Problem]
  type = NoSolveProblem
[]

[Outputs]
  exodus = true
  csv = true
[]

[VectorPostprocessors]
  # These samplers are used for testing purposes.
  # Sampling over all nodes would creates megabytes of data
  # Ordering the samples by z-coordinate is consistent in parallel
  [sample_channel_center]
    type = LineValueSampler
    variable = 'mdot SumWij P DP h T rho mu S w_perim'
    sort_by = 'z'
    # n_nodes is n_elems + 1
    num_points = ${fparse n_cells + 1}
    start_point = '0 ${fuel_pin_pitch} 0'
    end_point = '0 ${fuel_pin_pitch} ${height}'
  []
  [sample_channel_edge]
    type = LineValueSampler
    variable = 'mdot SumWij P DP h T rho mu S w_perim'
    sort_by = 'z'
    num_points = ${fparse n_cells + 1}
    # the offset places the sample inside the channel
    start_point = '${fparse fuel_pin_pitch / 2} ${fparse (fuel_element_pitch - inter_assembly_gap - 2 * duct_thickness) / 2 - 1e-3} 0'
    end_point = '${fparse fuel_pin_pitch / 2} ${fparse (fuel_element_pitch - inter_assembly_gap - 2 * duct_thickness) / 2 - 1e-3} ${fparse height}'
  []
  [sample_channel_corner]
    type = LineValueSampler
    variable = 'mdot SumWij P DP h T rho mu S w_perim'
    sort_by = 'z'
    num_points = ${fparse n_cells + 1}
    start_point = '${fparse (n_rings - 0.5) * fuel_pin_pitch} 0 0'
    end_point = '${fparse (n_rings - 0.5) * fuel_pin_pitch} 0 ${height}'
  []
  [sample_pin_center]
    type = LineValueSampler
    variable = 'q_prime Tpin Dpin'
    sort_by = 'z'
    num_points = ${fparse n_cells + 1}
    start_point = '0 0 0'
    end_point = '0 0 ${height}'
  []
[]

[Executioner]
  type = Transient
[]

(modules/subchannel/validation/EBR-II/3d_SCM_SS.i)

# Following Advanced Burner Test Reactor Preconceptual Design Report
# Vailable at: https://www.ne.anl.gov/eda/ABTR_1cv2_ws.pdf
# This file creates the 3D mesh where subchannel projects to
###################################################
# Geometric parameters
##################################################
scale_factor = 0.01
fuel_pin_pitch = '${fparse 0.5664*scale_factor}'
fuel_pin_diameter = '${fparse 0.4419*scale_factor}'
inner_duct_in = '${fparse 4.64*scale_factor}'
n_rings = 5
heated_length = '${fparse 34.3*scale_factor}'
unheated_length_exit = '${fparse 26.9*scale_factor}'
###################################################

[TriSubChannelMesh]
  [subchannel]
    type = SCMDetailedTriSubChannelMeshGenerator
    nrings = '${n_rings}'
    n_cells = 50
    flat_to_flat = '${inner_duct_in}'
    unheated_length_exit = '${unheated_length_exit}'
    heated_length = '${heated_length}'
    pin_diameter = '${fuel_pin_diameter}'
    pitch = '${fuel_pin_pitch}'
  []

  [fuel_pins]
    type = SCMDetailedTriPinMeshGenerator
    input = subchannel
    nrings = '${n_rings}'
    n_cells = 50
    unheated_length_exit = '${unheated_length_exit}'
    heated_length = '${heated_length}'
    pin_diameter = '${fuel_pin_diameter}'
    pitch = '${fuel_pin_pitch}'
  []
[]

[AuxVariables]
  [mdot]
    block = subchannel
  []
  [SumWij]
    block = subchannel
  []
  [P]
    block = subchannel
  []
  [DP]
    block = subchannel
  []
  [h]
    block = subchannel
  []
  [T]
    block = subchannel
  []
  [rho]
    block = subchannel
  []
  [mu]
    block = subchannel
  []
  [S]
    block = subchannel
  []
  [w_perim]
    block = subchannel
  []
  [displacement]
    block = subchannel
  []
  [q_prime]
    block = fuel_pins
  []
  [Tpin]
    block = fuel_pins
  []
  [Dpin]
    block = fuel_pins
  []
[]

[Problem]
  type = NoSolveProblem
[]

[Outputs]
  exodus = true
[]

[Executioner]
  type = Steady
[]

(modules/subchannel/validation/EBR-II/3d_SCM_TR.i)

# Following Advanced Burner Test Reactor Preconceptual Design Report
# Vailable at: https://www.ne.anl.gov/eda/ABTR_1cv2_ws.
# This file creates the 3D mesh where subchannel projects to
###################################################
# Geometric parameters
###################################################
# units are cm - do not forget to convert to meter
scale_factor = 0.01
fuel_pin_pitch = '${fparse 0.5664*scale_factor}'
fuel_pin_diameter = '${fparse 0.4419*scale_factor}'
inner_duct_in = '${fparse 4.64*scale_factor}'
n_rings = 5
heated_length = '${fparse 34.3*scale_factor}'
unheated_length_exit = '${fparse 26.9*scale_factor}'
###################################################

[TriSubChannelMesh]
  [subchannel]
    type = SCMDetailedTriSubChannelMeshGenerator
    nrings = '${n_rings}'
    n_cells = 50
    flat_to_flat = '${inner_duct_in}'
    unheated_length_exit = '${unheated_length_exit}'
    heated_length = '${heated_length}'
    pin_diameter = '${fuel_pin_diameter}'
    pitch = '${fuel_pin_pitch}'
  []

  [fuel_pins]
    type = SCMDetailedTriPinMeshGenerator
    input = subchannel
    nrings = '${n_rings}'
    n_cells = 50
    unheated_length_exit = '${unheated_length_exit}'
    heated_length = '${heated_length}'
    pin_diameter = '${fuel_pin_diameter}'
    pitch = '${fuel_pin_pitch}'
  []
[]

[AuxVariables]
  [mdot]
    block = subchannel
  []
  [SumWij]
    block = subchannel
  []
  [P]
    block = subchannel
  []
  [DP]
    block = subchannel
  []
  [h]
    block = subchannel
  []
  [T]
    block = subchannel
  []
  [rho]
    block = subchannel
  []
  [mu]
    block = subchannel
  []
  [S]
    block = subchannel
  []
  [w_perim]
    block = subchannel
  []
  [q_prime]
    block = fuel_pins
  []
  [Tpin]
    block = fuel_pins
  []
  [Dpin]
    block = fuel_pins
  []
[]

[Problem]
  type = NoSolveProblem
[]

[Outputs]
  exodus = true
[]

[Executioner]
  type = Transient
  start_time = -1.0
  dt = 100.0
  end_time = 900.0
[]

(modules/subchannel/validation/areva_FCTF/3D.i)

###################################################
# Geometric parameters
#####################################
fuel_pin_pitch = 0.01125 #m
fuel_pin_diameter = 0.0095 #m
inner_duct_in = 0.09164 #m
n_rings = 5
unheated_length_entry = 1.14 #m
heated_length = 1.71 #m
unheated_length_exit = 0.855 #m
###################################################

[TriSubChannelMesh]
  [subchannel]
    type = SCMDetailedTriSubChannelMeshGenerator
    nrings = '${n_rings}'
    n_cells = 65
    flat_to_flat = '${inner_duct_in}'
    unheated_length_entry = ${unheated_length_entry}
    heated_length = ${heated_length}
    unheated_length_exit = ${unheated_length_exit}
    pin_diameter = '${fuel_pin_diameter}'
    pitch = '${fuel_pin_pitch}'
  []

  [fuel_pins]
    type = SCMDetailedTriPinMeshGenerator
    input = subchannel
    nrings = '${n_rings}'
    n_cells = 65
    unheated_length_entry = ${unheated_length_entry}
    heated_length = ${heated_length}
    unheated_length_exit = ${unheated_length_exit}
    pin_diameter = '${fuel_pin_diameter}'
    pitch = '${fuel_pin_pitch}'
  []
[]

[AuxVariables]
  [mdot]
    block = subchannel
  []
  [SumWij]
    block = subchannel
  []
  [P]
    block = subchannel
  []
  [DP]
    block = subchannel
  []
  [h]
    block = subchannel
  []
  [T]
    block = subchannel
  []
  [rho]
    block = subchannel
  []
  [mu]
    block = subchannel
  []
  [S]
    block = subchannel
  []
  [w_perim]
    block = subchannel
  []
  [displacement]
    block = subchannel
  []
  [q_prime]
    block = fuel_pins
  []
  [Tpin]
    block = fuel_pins
  []
  [Dpin]
    block = fuel_pins
  []
[]

[Problem]
  type = NoSolveProblem
[]

[Outputs]
  exodus = true
[]

[Executioner]
  type = Steady
[]

(modules/subchannel/test/tests/mesh/detailed_tri_pin_mesh/coords.i)

[GlobalParams]
  nrings = 3
  n_cells = 20
  flat_to_flat = 0.056
  heated_length = 0.2
  pitch = 0.012
  pin_diameter = 0.01
[]

[TriSubChannelMesh]
  [subchannel]
    type = SCMDetailedTriSubChannelMeshGenerator
  []
  [pins]
    type = SCMDetailedTriPinMeshGenerator
    input = subchannel
  []
[]

Overview
Input Parameters
Input Files