[Gmsh] File formats
dolfyn
info at dolfyn.net
Tue Apr 7 12:21:26 CEST 2009
Hi all,
I'm puzzling about the file formats. At the moment the *.geo input
creates a *.msh file; this file is converted into the format for
the CFD solver which produces a result which is written into a
*.msh file (other formats can be selected as well; but the main
idea I'm after here is the feedback from the solver to gmsh).
However, the original *.geo file, and the first *.msh file, contain
the 'physical surface' information, this information is lost in the
process (point and lines are useless to the solver; the 'pysical
surfaces' are the boundary conditions). In the documentation a
legacy format *.pos is mentioned; as the original data/file is
still there it is not necessary to replicate this in the result
file so this could have been a good idea. But it's a 'legacy
format'...
In the same line: the idea that one can read in a background
result/mesh is very appealing. In the texts it is done for 2D
meshes; does this also work for 3D meshes? Tet or...? And how about
extruding a 2D mesh; the result is in 3D; create a cut plane and
use this 2D plane?
Finally, the results like velocity vectors/components, pressure,
temperature, effective viscosity etc etc are written either
as '$ElementData' or as '$NodeData$. When one starts gmsh with this
dataset all 'views' are shown (and stored); that consumes memory,
takes time. Is there another way? One a view is 'removed' it cannot
be 'recreated'. Is that correct?
Thanks in advance!
Henk