Gridgen中T-Rex的功能介绍

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T-Rex: Automated Boundary Layer Meshing for CFD

There is an advanced feature in Gridgen that reduces boundary layer mesh generation time from hours to minutes while producing higy quality grids that give accurate CFD solutions.This feature, anisotropic tetrahedral meshing ,is a little bit hidden ,so you may not be aware of it .And that name is kind of hard to remember and pronounce ,too,so let,s just call it T-Rex.

What is T-Rex?

It is a technique for extruding regular layers of high-quality tetrahedra from boundaries. The tetrahedra can be recombined into prisms if you prefer. The mesh adjusts to convex and concave regions and colliding extrusion fronts.

Will my CFD code like T-Rex?

Yes. T-Rex cells are designed to minimize maximum included angles and cell volume ratios, which are two key characteristics for improved CFD solver accuracy. CFD results for an ONERA M6 wing in transonic flow have similar accuracy for T-Rex and structured grids, while the T-Rex mesh is much easier to generate.

How can I learn more about T-Rex?

This technical paper describes the mathematics behind T-Rex in great detail: Anisotropic Tetrahedral Meshing Based on Surface Deformation Techniques by John P. Steinbrenner and J.P. Abelanet, AIAA paper no. 2007-0554.

The Winter 2010 issue of Focus On includes pictures of T-Rex meshes and CFD solutions not shown here.