[Dune] Creating a Grid

[Oliver Sander]

The GmshReader can now also read cube meshes.

--
Oliver

Am 27.12.2010 18:05, schrieb Oliver Sander:
> Am 27.12.2010 13:06, schrieb Christian Engwer:
>>>>> How can I resolve the above error? Also, I need help to create an
>>>>> *unstructured* UGGrid, that is, without the StructuredGridFactory
>>>>> class. Can someone please help me out with this?
>>> Well, you'll have to use some other tool to actually create the 
>>> mesh, Dune
>>> cannot do that for you.  And I'm sorry, but I don't actually know of 
>>> any mesh
>>> generator for cubic meshes -- you'll have to google yourself.  Make 
>>> sure the
>>> mesh generator can produce one of the file formats understood by 
>>> Dune -- that
>>> is either .dgf (Dune Grid Format -- you are unlikely to find such a 
>>> thing) or
>>> .msh (the file format of gmsh -- I'm not sure wether cubes are 
>>> supported in
>>> the dune-reader for that format, however).
> The Dune gmsh reader currently supports cubes only in 2d.  I have
> always wanted to add the remaining types, maybe I should just do
> this now.
>
>>>   You'll have to use either the
>>> DGFParser (note that the name of the class is GridPtr), or the 
>>> GmshReader.
>>> Look in the class documentation at
>>> <http://www.dune-project.org/doc/doxygen.html>  for the includes you 
>>> need.
>> Dune also support the starcd-Mesh-format and the amiramesh-format. I
>> know that the commercial Ansys CFD system has a mesh generator for
>> cartesian meshes, but I am sure there are also alternatives.
>>
>> Christian
>>
>>> If you cannot find a mesh generator that can export to a file format
>>> understood by dune, you can try to write a conversion program.  Mesh 
>>> file
>>> formats are often text-based and usually pretty simple, so this 
>>> should not be
>>> too difficult.  Or you can try to write a file reader for Dune using 
>>> the
>>> GridFactory.
>>>
>>> Bye,
>>> Jö.
>>>
>>> -- 
>>> Der Horizont vieler Menschen ist ein Kreis mit Radius Null - und das
>>> nennen sie ihren Standpunkt.
>>> -- A. Einstein
>>
>>
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