[Gmsh] how fill a 2D-mesh with 3D-elements calling GMSH from the shell

[Johannes_ACKVA]

hello

how can I fill a closed hull of 2D-elements with 3D-elements, by calling
GMSH from the shell?

I tried this:


>    gmsh MeshTria_2D.med  -3 -o quark.med

Info    : Running '/opt/gmsh-2.13.1-Linux/bin/gmsh MeshTria_2D.med -3 -o
quark.med' [Gmsh 2.13.1, 1 node, max. 1 thread]
Info    : Started on Mon Feb 20 09:20:03 2017
Info    : Reading 'MeshTria_2D.med'...
Info    : Reading MED file V3.2.0 using MED library V3.2.0
Info    : Reading 3-D unstructured mesh <<MeshTria_2D>>
Info    : Done reading 'MeshTria_2D.med'
Info    : Finalized high order topology of periodic connections
Info    : Meshing 1D...
Info    : Done meshing 1D (8e-06 s)
Info    : Meshing 2D...
Info    : Done meshing 2D (6.91414e-06 s)
Info    : Meshing 3D...
Info    : Done meshing 3D (5e-06 s)
Info    : 8 vertices 24 elements
Info    : Writing 'quark.med'...
Info    : Done writing 'quark.med'
Info    : Stopped on Mon Feb 20 09:20:03 2017

but the resulting mesh does not contain any 3D-elements, it is identic
to the input mesh.

Moreover, I discovered that after loading the 2D-mesh  (MeshTria_2D.med)
into the GUI, the button "3D" in "Mesh" does not create any 3D-elements.
I fear that a geometry is needed. Or is there a manner to create a
volume mesh from a 2D-mesh?

Many thanks for your help,

Johannes_ACKVA