[Gmsh] File formats

[Christophe Geuzaine]

dolfyn wrote:
> 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 

Hi Henk - you can just put your $NodeData, $ElementData, etc. in 
separate files, and merge them along with the original mesh :

gmsh mymesh.msh res1.msh res2.msh res3.msh


> 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 

Yes, for all unstructured grids.

> 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?


cf. above: split your results in separate files. You can also chose not 
to display views at startup (either set View[i].Visible=0; in a script, 
or -noview on the command line).


> 
> Thanks in advance!
> Henk
> 
> 
> 
> 
> 
> 
> 
> _______________________________________________
> gmsh mailing list
> gmsh at geuz.org
> http://www.geuz.org/mailman/listinfo/gmsh
> 
> 


-- 
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science
http://www.montefiore.ulg.ac.be/~geuzaine