[Gmsh] Attractor point

[Geordie McBain]

2011/6/23  <luos at msu.edu>:
> Dear All,
>
> I generated a 3D mesh with tetrahedrons.    A threshold filed with an
> attractor filed is used to get locally refined mesh.   The attractor field
> contians several points.  The resulting mesh looks good.
>
> The problem is that these attractor points do not belong to any
> tetrahedron.
> In the saved .msh  file,  they are node points but none of them  are
> vertecies of any tetrahedron.
>
> I want node list  to be vertecies of tetrahedrons.
>
> Could anyone please tell me what the problem is?  And how to fix these
> problems.

Hello.  I think you might be able to fix this - that is, suppress the
output of the nodes that aren't associated with elements - by
declaring the volume occupied by the tetrahedra as a Physical Volume.

http://geuz.org/gmsh/doc/texinfo/gmsh.html#Elementary-vs-physical-entities