Boundary2DDelaunayGenerator

Figure 1: The workflow of the Boundary2DDelaunayGenerator mesh generator.

Listing 1: Example input file to use Boundary2DDelaunayGenerator to prepare a cylinder surface mesh for 3D Delaunay mesh generation.

[Mesh<<<{"href": "../../syntax/Mesh/index.html"}>>>]
  [circle]
    type = ConcentricCircleMeshGenerator<<<{"description": "This ConcentricCircleMeshGenerator source code is to generate concentric circle meshes.", "href": "ConcentricCircleMeshGenerator.html"}>>>
    has_outer_square<<<{"description": "It determines if meshes for a outer square are added to concentric circle meshes."}>>> = false
    radii<<<{"description": "Radii of major concentric circles"}>>> = 1
    num_sectors<<<{"description": "num_sectors % 2 = 0, num_sectors > 0Number of azimuthal sectors in each quadrant'num_sectors' must be an even number."}>>> = 4
    rings<<<{"description": "Number of rings in each circle or in the enclosing square"}>>> = 1
    preserve_volumes<<<{"description": "Volume of concentric circles can be preserved using this function."}>>> = false
  []
  [side]
    type = SideSetsAroundSubdomainGenerator<<<{"description": "Adds element faces that are on the exterior of the given block to the sidesets specified", "href": "SideSetsAroundSubdomainGenerator.html"}>>>
    input<<<{"description": "The mesh we want to modify"}>>> = circle
    new_boundary<<<{"description": "The list of boundary names to create on the supplied subdomain"}>>> = side
    block<<<{"description": "The blocks around which to create sidesets"}>>> = 1
  []
  [extrude]
    type = AdvancedExtruderGenerator<<<{"description": "Extrudes a 1D mesh into 2D, or a 2D mesh into 3D, can have a variable height for each elevation, variable number of layers within each elevation, variable growth factors of axial element sizes within each elevation and remap subdomain_ids, boundary_ids and element extra integers within each elevation as well as interface boundaries between neighboring elevation layers.", "href": "AdvancedExtruderGenerator.html"}>>>
    input<<<{"description": "The mesh to extrude"}>>> = side
    heights<<<{"description": "The height of each elevation"}>>> = '2'
    num_layers<<<{"description": "The number of layers for each elevation - must be num_elevations in length!"}>>> = '3'
    direction<<<{"description": "A vector that points in the direction to extrude (note, this will be normalized internally - so don't worry about it here)"}>>> = '0 0 1'
  []
  [side_1]
    type = ParsedGenerateSideset<<<{"description": "A MeshGenerator that adds element sides to a sideset if the centroid of the side satisfies the `combinatorial_geometry` expression.", "href": "ParsedGenerateSideset.html"}>>>
    combinatorial_geometry<<<{"description": "Function expression encoding a combinatorial geometry"}>>> = 'x>=0&y>=0'
    new_sideset_name<<<{"description": "The name of the new sideset"}>>> = 'side_1'
    input<<<{"description": "The mesh we want to modify"}>>> = 'extrude'
    included_boundaries<<<{"description": "A set of boundary names or ids whose sides will be included in the new sidesets.  A side is only added if it also belongs to one of these boundaries."}>>> = 'side'
  []
  [bd_1]
    type = Boundary2DDelaunayGenerator<<<{"description": "Mesh generator that convert a 2D surface given as one or a few boundaries of a 3D mesh into a 2D mesh using Delaunay triangulation.", "href": "Boundary2DDelaunayGenerator.html"}>>>
    input<<<{"description": "The mesh we want to modify"}>>> = side_1
    boundary_names<<<{"description": "The boundaries to be used"}>>> = 'side_1'
    use_auto_area_func<<<{"description": "Use the automatic area function for the triangle meshing region."}>>> = true
  []
  [side_2]
    type = ParsedGenerateSideset<<<{"description": "A MeshGenerator that adds element sides to a sideset if the centroid of the side satisfies the `combinatorial_geometry` expression.", "href": "ParsedGenerateSideset.html"}>>>
    combinatorial_geometry<<<{"description": "Function expression encoding a combinatorial geometry"}>>> = 'x<0&y>=0'
    new_sideset_name<<<{"description": "The name of the new sideset"}>>> = 'side_2'
    input<<<{"description": "The mesh we want to modify"}>>> = 'extrude'
    included_boundaries<<<{"description": "A set of boundary names or ids whose sides will be included in the new sidesets.  A side is only added if it also belongs to one of these boundaries."}>>> = 'side'
  []
  [bd_2]
    type = Boundary2DDelaunayGenerator<<<{"description": "Mesh generator that convert a 2D surface given as one or a few boundaries of a 3D mesh into a 2D mesh using Delaunay triangulation.", "href": "Boundary2DDelaunayGenerator.html"}>>>
    input<<<{"description": "The mesh we want to modify"}>>> = side_2
    boundary_names<<<{"description": "The boundaries to be used"}>>> = 'side_2'
    use_auto_area_func<<<{"description": "Use the automatic area function for the triangle meshing region."}>>> = true
  []
  [side_3]
    type = ParsedGenerateSideset<<<{"description": "A MeshGenerator that adds element sides to a sideset if the centroid of the side satisfies the `combinatorial_geometry` expression.", "href": "ParsedGenerateSideset.html"}>>>
    combinatorial_geometry<<<{"description": "Function expression encoding a combinatorial geometry"}>>> = 'x<0&y<0'
    new_sideset_name<<<{"description": "The name of the new sideset"}>>> = 'side_3'
    input<<<{"description": "The mesh we want to modify"}>>> = 'extrude'
    included_boundaries<<<{"description": "A set of boundary names or ids whose sides will be included in the new sidesets.  A side is only added if it also belongs to one of these boundaries."}>>> = 'side'
  []
  [bd_3]
    type = Boundary2DDelaunayGenerator<<<{"description": "Mesh generator that convert a 2D surface given as one or a few boundaries of a 3D mesh into a 2D mesh using Delaunay triangulation.", "href": "Boundary2DDelaunayGenerator.html"}>>>
    input<<<{"description": "The mesh we want to modify"}>>> = side_3
    boundary_names<<<{"description": "The boundaries to be used"}>>> = 'side_3'
    use_auto_area_func<<<{"description": "Use the automatic area function for the triangle meshing region."}>>> = true
  []
  [side_4]
    type = ParsedGenerateSideset<<<{"description": "A MeshGenerator that adds element sides to a sideset if the centroid of the side satisfies the `combinatorial_geometry` expression.", "href": "ParsedGenerateSideset.html"}>>>
    combinatorial_geometry<<<{"description": "Function expression encoding a combinatorial geometry"}>>> = 'x>=0&y<0'
    new_sideset_name<<<{"description": "The name of the new sideset"}>>> = 'side_4'
    input<<<{"description": "The mesh we want to modify"}>>> = 'extrude'
    included_boundaries<<<{"description": "A set of boundary names or ids whose sides will be included in the new sidesets.  A side is only added if it also belongs to one of these boundaries."}>>> = 'side'
  []
  [bd_4]
    type = Boundary2DDelaunayGenerator<<<{"description": "Mesh generator that convert a 2D surface given as one or a few boundaries of a 3D mesh into a 2D mesh using Delaunay triangulation.", "href": "Boundary2DDelaunayGenerator.html"}>>>
    input<<<{"description": "The mesh we want to modify"}>>> = side_4
    boundary_names<<<{"description": "The boundaries to be used"}>>> = 'side_4'
    use_auto_area_func<<<{"description": "Use the automatic area function for the triangle meshing region."}>>> = true
  []
  [bd_bot]
    type = Boundary2DDelaunayGenerator<<<{"description": "Mesh generator that convert a 2D surface given as one or a few boundaries of a 3D mesh into a 2D mesh using Delaunay triangulation.", "href": "Boundary2DDelaunayGenerator.html"}>>>
    input<<<{"description": "The mesh we want to modify"}>>> = extrude
    boundary_names<<<{"description": "The boundaries to be used"}>>> = '2'
    use_auto_area_func<<<{"description": "Use the automatic area function for the triangle meshing region."}>>> = true
  []
  [bd_top]
    type = Boundary2DDelaunayGenerator<<<{"description": "Mesh generator that convert a 2D surface given as one or a few boundaries of a 3D mesh into a 2D mesh using Delaunay triangulation.", "href": "Boundary2DDelaunayGenerator.html"}>>>
    input<<<{"description": "The mesh we want to modify"}>>> = extrude
    boundary_names<<<{"description": "The boundaries to be used"}>>> = '3'
    use_auto_area_func<<<{"description": "Use the automatic area function for the triangle meshing region."}>>> = true
  []
  [smg]
    type = StitchMeshGenerator<<<{"description": "Allows multiple mesh files to be stitched together to form a single mesh.", "href": "StitchMeshGenerator.html"}>>>
    inputs<<<{"description": "The input MeshGenerators."}>>> = 'bd_1 bd_2 bd_3 bd_4 bd_top bd_bot'
    clear_stitched_boundary_ids<<<{"description": "Whether or not to clear the stitched boundary IDs"}>>> = true
    stitch_boundaries_pairs<<<{"description": "Pairs of boundaries to be stitched together between the 1st mesh in inputs and each consecutive mesh"}>>> = '0 0;0 0;0 0;0 0;0 0'
    merge_boundaries_with_same_name<<<{"description": "If the input meshes have boundaries with the same name (but different IDs), merge them"}>>> = true
    prevent_boundary_ids_overlap<<<{"description": "Whether to re-number boundaries in stitched meshes to prevent merging of unrelated boundaries"}>>> = false
  []
  [xyzd]
    type = XYZDelaunayGenerator<<<{"description": "Creates tetrahedral 3D meshes within boundaries defined by input meshes.", "href": "XYZDelaunayGenerator.html"}>>>
    boundary<<<{"description": "The input MeshGenerator defining the output outer boundary. The input mesh (the output mesh of the input mesh generator) can either include 3D volume elements or 2D surface elements."}>>> = smg
    desired_volume<<<{"description": "Desired (maximum) tetrahedral volume, or 0 to skip uniform refinement"}>>> = 1
    output_subdomain_name<<<{"description": "Subdomain name to set on new triangles."}>>> = 'matrix'
  []
[]

Figure 2: The workflow of the Boundary2DDelaunayGenerator mesh generator.