Sidewall AnglesΒΆ

Learning targets

  • Define 3D objects with non-rectangular sidewalls in z-direction

In the previous section we were only able to produce geometries with straight sidewalls in the vertical direction. This example shows how to define non-rectangular sidewalls for the cylinder geometry of the previous section:

_images/sidewall_angles.png

As a simple concept we redefine the geometry parameters of the cross-section layout at an interface of two layers. This is done by adding a LayerInterface section between two layers containing a dictionary called GeometryValues:

LayerInterface {
  GeometryValues = [
    Circle/Radius = 0.8
  ]
}

.jcm Input File

  • layout.jcm [ASCII]

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    Layout3D {
  Name = "TutorialExample3D"
  UnitOfLength = 1e-06
  MeshOptions {
    MaximumSideLength = 1.3
  }
  BoundaryConditions {
    Boundary {
      Direction = Vertical 
      Class = Transparent 
    }
    Boundary {
      Direction = Horizontal 
      Class = Periodic
    }
  }
  Extrusion {
    Objects {    
      Polygon { 
        Name = "ComputationalDomain/Background" 
        DomainId = 1
        Priority = -1 
        Points = [-2 -2, 2 -2, 2 2, -2 2]         
      } 
      
      Circle {
        Name = "Circle" 
        DomainId = 2
        Radius = 1     
        MeshOptions {
          BoundaryMeshConstraint = .4
        }
      }
    }
    MultiLayer {
      
      Layer {
        Thickness = 1.0
        DomainId = 1
      }
      Layer {
        Thickness = 0.1
        DomainId = 2
      }
      LayerInterface {
        GlobalZ = 0.0
      }
      Layer {
        Thickness = 1.5
        DomainIdMapping = [1 2 
                           2 3]
      }
      LayerInterface {
        GeometryValues = [
        Circle/Radius = 0.8
        ]
      }
      Layer {
        Thickness = 2.0
        DomainIdMapping = [1 2]
      }
    }  
  }
}

Alternatively we can set the parameters the Radius parametrically in the cross-section layouts at the interface of two layers. This is done by adding a PiecewiseLinear section inside the Radius definition of the Circle in the Object section of the extrusion:

Circle {
   ...
   Radius {
     PiecewiseLinear {
       AtInterface {
         Interface =  0
         Radius = 1
       }
       AtInterface {
         Interface =  3
         Radius = 0.8
       }
     }
   }

.jcm Input File with parametric definition

  • layout.parametric.jcm [ASCII]

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    Layout3D {
  Name = "TutorialExample3D"
  UnitOfLength = 1e-06
  MeshOptions {
    MaximumSideLength = 1.3
  }
  BoundaryConditions {
    Boundary {
      Direction = Vertical 
      Class = Transparent 
    }
    Boundary {
      Direction = Horizontal 
      Class = Periodic
    }
  }
  Extrusion {
    Objects {    
      Polygon { 
        Name = "ComputationalDomain/Background" 
        DomainId = 1
        Priority = -1 
        Points = [-2 -2, 2 -2, 2 2, -2 2]         
      } 
      
      Circle {
        Name = "Circle" 
        DomainId = 2
        Radius {
          PiecewiseLinear {
            AtInterface {
              Interface =  0
              Radius = 1
            }           
            AtInterface {
              Interface =  3
              Radius = 0.8
            }
          }
        }
        MeshOptions {
          BoundaryMeshConstraint = .4
        }
      }
    }
    MultiLayer {
      
      Layer {
        Thickness = 1.0
        DomainId = 1
      }
      Layer {
        Thickness = 0.1
        DomainId = 2
      }
      LayerInterface {
        GlobalZ = 0.0
      }
      Layer {
        Thickness = 1.5
        DomainIdMapping = [1 2 
                           2 3]
      }
      Layer {
        Thickness = 2.0
        DomainIdMapping = [1 2]
      }
    }  
  }
}