MPSCircularCrossSectionMeshGenerator

Generates a cross section mesh of an axisymmetric fuel rod with an MPS.

Description

This mesh class generates a sliced, circular cross section mesh of fuel and cladding where the fuel has a Missing Pellet Surface (MPS) defect. The mesh class is built on top of CircularCrossSectionMeshGenerator.

Figure 1: Typical mesh from MPSCircularCrossSectionMeshGenerator.

Figure 2: Nodeset ids and locations for a typical MPS circular cross section mesh.

[Mesh<<<{"href": "../../syntax/Mesh/index.html"}>>>]
  [mpsccsmg]
    type = MPSCircularCrossSectionMeshGenerator<<<{"description": "Generates a cross section mesh of an axisymmetric fuel rod with an MPS.", "href": "MPSCircularCrossSectionMeshGenerator.html"}>>>
    num_sectors<<<{"description": "Number of azimuthal sectors in each quadrant. 'num_sectors' must be an even number."}>>> = 20
    elements_per_ring<<<{"description": "A list giving the number of elements in each ring (will be zero for a gap). The first entry is the number of radial elements outside the inner quadrilateral portion of the fuel mesh."}>>> = '5 0 3'
    block_names<<<{"description": "A list giving the block names.  Must be the same length as elements_per_ring.  If an entry in 'elements_per_ring' is zero, the corresponding entry in block_names will be ignored."}>>> = 'fuel null clad'
    coordinates<<<{"description": "Radial coordinates of mesh block boundaries."}>>> = '0.0041 0.00418 0.00474'
    mps_depth<<<{"description": "Radial depth of MPS"}>>> = 0.0005
  []
[]

Input Parameters

block_namesA list giving the block names. Must be the same length as elements_per_ring. If an entry in 'elements_per_ring' is zero, the corresponding entry in block_names will be ignored.
C++ Type:std::vector<std::string>
Controllable:No
Description:A list giving the block names. Must be the same length as elements_per_ring. If an entry in 'elements_per_ring' is zero, the corresponding entry in block_names will be ignored.
coordinatesRadial coordinates of mesh block boundaries.
C++ Type:std::vector<double>
Unit:(no unit assumed)
Controllable:No
Description:Radial coordinates of mesh block boundaries.
elements_per_ringA list giving the number of elements in each ring (will be zero for a gap). The first entry is the number of radial elements outside the inner quadrilateral portion of the fuel mesh.
C++ Type:std::vector<unsigned int>
Controllable:No
Description:A list giving the number of elements in each ring (will be zero for a gap). The first entry is the number of radial elements outside the inner quadrilateral portion of the fuel mesh.
mps_depthRadial depth of MPS
C++ Type:double
Unit:(no unit assumed)
Controllable:No
Description:Radial depth of MPS
num_sectorsNumber of azimuthal sectors in each quadrant. 'num_sectors' must be an even number.
C++ Type:unsigned int
Controllable:No
Description:Number of azimuthal sectors in each quadrant. 'num_sectors' must be an even number.

Required Parameters

all_bottom_leftFalseWhether to generate sidesets for every bottom and left surface of mesh blocks.
Default:False
C++ Type:bool
Controllable:No
Description:Whether to generate sidesets for every bottom and left surface of mesh blocks.
axial_directionzThe direction perpendicular to the circular cross section.
Default:z
C++ Type:MooseEnum
Options:x, y, z
Controllable:No
Description:The direction perpendicular to the circular cross section.
axial_offset0The offset of the generated mesh in the axial direction of the fuel rod from the origin.
Default:0
C++ Type:double
Unit:(no unit assumed)
Controllable:No
Description:The offset of the generated mesh in the axial direction of the fuel rod from the origin.
biasMesh bias. Same length as elements_per_ring, each entry b: 0.5 <= b <= 2.0.
C++ Type:std::vector<double>
Unit:(no unit assumed)
Controllable:No
Description:Mesh bias. Same length as elements_per_ring, each entry b: 0.5 <= b <= 2.0.
compress_boundary_idsFalseWhether to compress the boundary IDs into a consecutive list.
Default:False
C++ Type:bool
Controllable:No
Description:Whether to compress the boundary IDs into a consecutive list.
dual_biasMesh dual bias. If given, bias must be given. Same length as bias, each entry b: 0.5 <= b <= 2.0.
C++ Type:std::vector<double>
Unit:(no unit assumed)
Controllable:No
Description:Mesh dual bias. If given, bias must be given. Same length as bias, each entry b: 0.5 <= b <= 2.0.
elem_typequad8Whether to generate quad8 or quad4 elements.
Default:quad8
C++ Type:MooseEnum
Options:quad4, quad8
Controllable:No
Description:Whether to generate quad8 or quad4 elements.
name_prefixIf provided, prefix the built in boundary names with this string
C++ Type:std::string
Controllable:No
Description:If provided, prefix the built in boundary names with this string
offset0 0 The in-plane offset of the fuel (to generate eccentric fuel.
Default:0 0
C++ Type:std::vector<double>
Unit:(no unit assumed)
Controllable:No
Description:The in-plane offset of the fuel (to generate eccentric fuel.
portiontop_halfControl of which part of mesh is created
Default:top_half
C++ Type:MooseEnum
Options:full, top_half
Controllable:No
Description:Control of which part of mesh is created

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

(test/tests/circular_cross_section_mesh/mps_circular_cross_section_mesh_generator.i)

References

No citations exist within this document.

(test/tests/circular_cross_section_mesh/mps_circular_cross_section_mesh_generator.i)

#
# Test of capability to generate cross-section meshes.
#
# Volume check with r_fuel = 0.0041, r_clad_inner = 0.00418,
#   r_clad_outer = 0.00474, mps_depth = 0.0005
#   for a quarter of a fuel rod:
#
#                Fuel         Gap          Total
#        BISON:  2.574262e-5  1.702959e-6  3.529202e-5
#   Analytical:  2.574262e-5  1.702961e-6  3.529202e-5
#

[Mesh]
  [mpsccsmg]
    type = MPSCircularCrossSectionMeshGenerator
    num_sectors = 20
    elements_per_ring = '5 0 3'
    block_names = 'fuel null clad'
    coordinates = '0.0041 0.00418 0.00474'
    mps_depth = 0.0005
  []
[]

[Variables]
  [u]
  []
[]

[Kernels]
  [diff]
    type = Diffusion
    variable = u
  []
[]

[BCs]
  [left]
    type = DirichletBC
    variable = u
    boundary = 9
    value = 100
  []
  [right]
    type = DirichletBC
    variable = u
    boundary = 2
    value = 200
  []
[]

[Executioner]
  type = Steady
[]

[Postprocessors]
  [fuelVolume]
    type = InternalVolume
    boundary = 8
  []
  [gapVolume]
    type = InternalVolume
    boundary = 9
  []
  [totalVolume]
    type = InternalVolume
    boundary = 2
  []
[]

[Outputs]
  [out]
    type = Exodus
  []
[]

(test/tests/circular_cross_section_mesh/mps_circular_cross_section_mesh_generator.i)

#
# Test of capability to generate cross-section meshes.
#
# Volume check with r_fuel = 0.0041, r_clad_inner = 0.00418,
#   r_clad_outer = 0.00474, mps_depth = 0.0005
#   for a quarter of a fuel rod:
#
#                Fuel         Gap          Total
#        BISON:  2.574262e-5  1.702959e-6  3.529202e-5
#   Analytical:  2.574262e-5  1.702961e-6  3.529202e-5
#

[Mesh]
  [mpsccsmg]
    type = MPSCircularCrossSectionMeshGenerator
    num_sectors = 20
    elements_per_ring = '5 0 3'
    block_names = 'fuel null clad'
    coordinates = '0.0041 0.00418 0.00474'
    mps_depth = 0.0005
  []
[]

[Variables]
  [u]
  []
[]

[Kernels]
  [diff]
    type = Diffusion
    variable = u
  []
[]

[BCs]
  [left]
    type = DirichletBC
    variable = u
    boundary = 9
    value = 100
  []
  [right]
    type = DirichletBC
    variable = u
    boundary = 2
    value = 200
  []
[]

[Executioner]
  type = Steady
[]

[Postprocessors]
  [fuelVolume]
    type = InternalVolume
    boundary = 8
  []
  [gapVolume]
    type = InternalVolume
    boundary = 9
  []
  [totalVolume]
    type = InternalVolume
    boundary = 2
  []
[]

[Outputs]
  [out]
    type = Exodus
  []
[]

Description
Input Parameters
Input Files
References