[Gmsh] internal boundaries in gmsh

[Christophe Geuzaine]

Jean-François Remacle wrote:
> Christophe Geuzaine a écrit :
>> Gergina V Pencheva wrote:
>>   
>>> Hi,
>>>
>>> I am trying to generate a simple 2d domain with an internal boundary (a 
>>> square with a crack in it). I tried different things but nothing seemed
>>> to work. Is it possible at all to do this in GMSH?
>>>
>>>     
>> With the current version it's not possible: you need to connect this 
>> internal boundary with the exterior boundary.
>>
>>
>>
>>   
> Indeed it IS possible to do that,
> 

Not with the version available on the web (2.0.8). You'll need to 
download and compile the latest source snapshot for this to work 
(http://geuz.org/gmsh/src/gmsh-nightly-source.tgz).

Also, beware that it will only work with Gmsh's native models (not 
models imported from STEP/IGES files), and only in 2D for now.

Ch.



> Point(1) = {-0,0.3,0,0.2};
> Point(2) = {-0,1.1,0,0.2};
> Point(3) = {0.9,1.1,0,0.2};
> Point(4) = {0.9,0.3,0,0.2};
> Point(5) = {0.3,0.7,0,0.03};
> Point(6) = {0.6,0.7,0,0.03};
> Line(1) = {1,2};
> Line(2) = {2,3};
> Line(3) = {3,4};
> Line(4) = {4,1};
> Line(5) = {5,6};
> Line Loop(6) = {3,4,1,2};
> Plane Surface(7) = {6};
> Line{5} In Surface {7};
> 
> The line 5 will be embedded in surface 7 i.e. the 2D mesh generation 
> process will
> ensure that the line segments are present in the 2D mesh and will be 
> classified
> (tagged) on line 5.
> 
> 
> 
>>> Thanks in advance,
>>> GP
>>>
>>> _______________________________________________
>>> gmsh mailing list
>>> gmsh at geuz.org
>>> http://www.geuz.org/mailman/listinfo/gmsh
>>>
>>>
>>>     
>>
>>   
> 
> 
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> 


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