This first tutorial illustrates some of the basic operations for generating a mesh using
GAMBIT. In particular, it demonstrates:
• How to build the geometry easily using the “top-down” solid modeling approach
• How to create a hexahedral mesh automatically
The “top-down” approach means that you will construct the geometry by creating
volumes (bricks, cylinders, etc.) and then manipulating them through Boolean operations
(unite, subtract, etc.). In this way, you can quickly build complicated shapes without first
creating the underlying vertices, edges, and faces.
Once you have built a valid geometry model, you can directly and (in many cases) automatically create the mesh. In this example, the Cooper meshing algorithm is used to automatically create an unstructured, hexahedral mesh. More complicated geometries may
require some manual decomposition before you can create the mesh; this is demonstrated
in subsequent tutorials.
The steps you will follow in this tutorial are listed below:
• Create two volumes (a brick and an elliptical cylinder).
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