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The Open FUSION Toolkit 1.0.0-8905cc5
Modeling tools for plasma and fusion research and engineering
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The Open FUSION Toolkit includes an interface to the free GMSH mesh generation program, pre-built binary versions of this software are available for most operating systems. Currently this interface only supports import and non-conformal refinement and is designed to allow the use of OFT when one of the other proprietary mesh programs is not available. In the future we hope to update this interface to support some form of boundary conformal refinement, most likely based on a quadratic input mesh.
OFT uses files output in GMSH's mesh format. An example is shown below for generating a simple mesh from a CAD file torus.stp using the command line interface and saving it in the file torus.mesh.
gmsh -3 -format mesh -optimize -clscale .1 -order 2 -o torus.mesh torus.stp
This generates a mesh of tetrahedra with a quadratic boundary representation and a basic mesh size of 0.1. For most simple cases these are the only options that are required with changes to the desired element size and order only. GMSH has a number of mesh generation options, for more information see the GMSH documentation.
In order to use a GMSH mesh cad_type = 3 must be specified in the mesh_options group. The mesh files and some additional options are specified at runtime in the gmsh_options group. The options available in this group are listed below.
Option group: gmsh_options
| Option | Description | Type [dim] |
|---|---|---|
filename="" | Name of mesh file | str(40) |
order=1 | Order of input mesh (not yet used) | int |
1.9.8