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]

     1Layout3D {
 2  Name = "TutorialExample3D"
 3  UnitOfLength = 1e-06
 4  MeshOptions {
 5    MaximumSideLength = 1.3
 6  }
 7  BoundaryConditions {
 8    Boundary {
 9      Direction = Vertical 
10      Class = Transparent 
11    }
12    Boundary {
13      Direction = Horizontal 
14      Class = Periodic
15    }
16  }
17  Extrusion {
18    Objects {    
19      Polygon { 
20        Name = "ComputationalDomain/Background" 
21        DomainId = 1
22        Priority = -1 
23        Points = [-2 -2, 2 -2, 2 2, -2 2]         
24      } 
25      
26      Circle {
27        Name = "Circle" 
28        DomainId = 2
29        Radius = 1     
30        MeshOptions {
31          BoundaryMeshConstraint = .4
32        }
33      }
34    }
35    MultiLayer {
36      
37      Layer {
38        Thickness = 1.0
39        DomainId = 1
40      }
41      Layer {
42        Thickness = 0.1
43        DomainId = 2
44      }
45      LayerInterface {
46        GlobalZ = 0.0
47      }
48      Layer {
49        Thickness = 1.5
50        DomainIdMapping = [1 2 
51                           2 3]
52      }
53      LayerInterface {
54        GeometryValues = [
55        Circle/Radius = 0.8
56        ]
57      }
58      Layer {
59        Thickness = 2.0
60        DomainIdMapping = [1 2]
61      }
62    }  
63  }
64}

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]

     1Layout3D {
 2  Name = "TutorialExample3D"
 3  UnitOfLength = 1e-06
 4  MeshOptions {
 5    MaximumSideLength = 1.3
 6  }
 7  BoundaryConditions {
 8    Boundary {
 9      Direction = Vertical 
10      Class = Transparent 
11    }
12    Boundary {
13      Direction = Horizontal 
14      Class = Periodic
15    }
16  }
17  Extrusion {
18    Objects {    
19      Polygon { 
20        Name = "ComputationalDomain/Background" 
21        DomainId = 1
22        Priority = -1 
23        Points = [-2 -2, 2 -2, 2 2, -2 2]         
24      } 
25      
26      Circle {
27        Name = "Circle" 
28        DomainId = 2
29        Radius {
30          PiecewiseLinear {
31            AtInterface {
32              Interface =  0
33              Radius = 1
34            }           
35            AtInterface {
36              Interface =  3
37              Radius = 0.8
38            }
39          }
40        }
41        MeshOptions {
42          BoundaryMeshConstraint = .4
43        }
44      }
45    }
46    MultiLayer {
47      
48      Layer {
49        Thickness = 1.0
50        DomainId = 1
51      }
52      Layer {
53        Thickness = 0.1
54        DomainId = 2
55      }
56      LayerInterface {
57        GlobalZ = 0.0
58      }
59      Layer {
60        Thickness = 1.5
61        DomainIdMapping = [1 2 
62                           2 3]
63      }
64      Layer {
65        Thickness = 2.0
66        DomainIdMapping = [1 2]
67      }
68    }  
69  }
70}