Experiences with the Construction of a Tetrahedral Mesh for a 3D Model of a Normal Fault Relay Ramp.

Felix Trãger and Ines Gõrz and Björn Zehner and Jeanne Pellerin. ( 2014 )
in: Proc. 34th Gocad Meeting, Nancy

Abstract

We tested tools for building tetrahedral meshes for the 3D surface model of a normal fault relay ramp. The geological boundary surfaces were modeled with the Skua® Structure and Stratigraphy Workflow. The model had to be re-meshed in order to improve the quality of the triangulation and to adapt the surface mesh to geometric constraints so that a tetrahedral mesh suitable for finite element simulations could be generated. We used two Gocad/Skua research plugins, CompGeom and Tweedle. Both plugins allow Gocad/Skua to be combined with external meshing software. CompGeom supports the export to Gmsh and TetGen, while Tweedle supports the export to Graphite. Both workflows produced a conformable surface mesh, which contained several errors that had to be repaired by hand prior to passing the model to TetGen for generation of a tetrahedral tessellation. Both workflows result in a tetrahedral mesh which represents the geometry of the model and respects all surface boundary contact lines.

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BibTeX Reference

@inproceedings{TragerGM2014,
 abstract = { We tested tools for building tetrahedral meshes for the 3D surface model of a normal fault relay ramp. The geological boundary surfaces were modeled with the Skua® Structure and Stratigraphy Workflow. The model had to be re-meshed in order to improve the quality of the triangulation and to adapt the surface mesh to geometric constraints so that a tetrahedral mesh suitable for finite element simulations could be generated. We used two Gocad/Skua research plugins, CompGeom and Tweedle. Both plugins allow Gocad/Skua to be combined with external meshing software. CompGeom supports the export to Gmsh and TetGen, while Tweedle supports the export to Graphite. Both workflows produced a conformable surface mesh, which contained several errors that had to be repaired by hand prior to passing the model to TetGen for generation of a tetrahedral tessellation. Both workflows result in a tetrahedral mesh which represents the geometry of the model and respects all surface boundary contact lines. },
 author = { Trãger, Felix AND Gõrz, Ines AND Zehner, Björn AND Pellerin, Jeanne },
 booktitle = { Proc. 34th Gocad Meeting, Nancy },
 title = { Experiences with the Construction of a Tetrahedral Mesh for a 3D Model of a Normal Fault Relay Ramp. },
 year = { 2014 }
}