[Gmsh] Unable to create 3D mesh

[adhitomo sulistyo]

Hi, I am trying to create a reservoir model with unstructured grids. The
reservoir is box shaped, with two horizontal wells on one side, and one
vertical well on the other side. The model is basically a box with three
cylinders inside.

Initially I succeeded in creating the 3D mesh. However, later I found that
the mesh from the cylinder and the box were different and intersecting with
each other. Based on the information from the web, I need to embed the
surfaces inside the volume.

After successfully embedding the surfaces, the 2D mesh looks good. There
are no longer intersecting grids However, when I try to run the 3D mesh, it
fails. I get the following error message:

Info    : Done meshing 2D (0.715054 s)
Info    : Meshing 3D...
Info    : Delaunay Meshing 4 volumes with 4 connected components
Info    : Meshing volume 227 (Delaunay)
Info    : 7174 points 36783 edges and 14324 faces in the initial mesh




*Info    : Found void regionInfo    : Found void regionInfo    : Found void
regionInfo    : Found void regionError   : No tetrahedra in region 227 0*
*Info    : 3D point insertion terminated (7204 points created):*
Info    :  - 0 Delaunay cavities modified for star shapeness
Info    :  - 0 points could not be inserted
Info    :  - 0 tetrahedra created in 0.010615 sec. (0 tets/sec.)
Info    : Meshing volume 228 (Delaunay)
Info    : 155 points 592 edges and 280 faces in the initial mesh
Info    : Found region 228
Info    : 0 points created - Worst tet radius is 1.10375 (PTS removed 0 0)
Info    : 3D point insertion terminated (7185 points created):
Info    :  - 0 Delaunay cavities modified for star shapeness
Info    :  - 0 points could not be inserted
Info    :  - 308 tetrahedra created in 0.004804 sec. (64113 tets/sec.)
Info    : Meshing volume 229 (Delaunay)

I have also attached the gmsh file.

Thank you for your help.

Kind regards,
Adhitomo
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