Convex HullΒΆ

Learning targets

  • enclose one or several domains by the convex hull
  • use automatically generated convex hull as computational domain

In this example we enclose two structures by their convex hull which we use as the computational domain with transparent boundary conditions.

_images/ex2d_convex_hull_mesh.png

With the Parent declaration in convex hull definition (see layout.jcm) we select the structures for enclosure. The convex hull is enlarged by the Offset value.

Note

All defined regions are enclosed when skipping the Parent declaration for the convex hull.

.jcm Input File

  • layout.jcm [ASCII]

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    Layout2D {  
  UnitOfLength = 1  
  Objects {
    Parallelogram {
      Name = "Parallelogram1"
      Width = 4
      Height = 0.8
      DomainId = 2
    }
    Parallelogram {
      Name = "Parallelogram2"
      GlobalPosition = [3 0.0]
      Width = 0.8
      Height = 4
      DomainId = 2
    }
    Polygon {
      ConvexHull {
        Parent = "Parallelogram1,Parallelogram2"
        Offset = 0.4
      }
      Priority = -1
      DomainId = 1
      Boundary {
        Class = Transparent
      }    
    }
  }
}