[Gmsh] Question on gmsh

[Steve Daley]

I am very interested in using gmsh to generate tet meshes for my own CFD code development.  I can see that gmsh will potentially be very useful to me to genertae my tet meshes but is it possible for gmsh to output whether a triangle element in a tet mesh is a surface triangle ?

Also can you explain what "physical 99" and "elementary 2" means in the example on Page 85.

Thanks

Steve Daley
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