[Gmsh] 3D interconnection of structured and unstructured grids

[Ruth V. Sabariego]

Sorry Daniele, that's not possible when mixing structured and 
unstructured grids.
Ruth


On 04/04/11 13:29, Trimarchi D. wrote:
> Hi Ruth,
> Yes, I agree with your remark. The question was not well posed: is there any way to build prisms or pyramids in gmsh?
>
> Thanks,
>               Daniele
>
>
>
> On 4/4/11 11:54, "Ruth V. Sabariego"<r.sabariego at ulg.ac.be>  wrote:
>
>    First, remove the line:
>   Line(62) = {27, 27};
>
>   Second, it is simply not possible to get only tetrahedra when you have squares in one of the surfaces enclosing the volume, prisms and/or pyramids should be generated.
>   If you don't recombine Surface 11, you will get a mesh with prisms and tetrahedra.
>
>   Ruth
>
>   On 04/04/11 11:23, Trimarchi D. wrote:
>
> Hi Ruth,
> Thank you for your post, this is very interesting. I am also interested in how to connect structured and un-structured blocks; however I find problems when try to connect structured hexa and unstructured tetra.
>
> Please find attached an example where four blocks are connected. I cold'nt figure out how to resolve the connection between the tetra and hexa.
>
> Any guess?
>
> Thanks,
>               Daniele
>
>
>
>
> On 31/3/11 20:54, "Ruth V. Sabariego"<r.sabariego at ulg.ac.be>  <mailto:r.sabariego at ulg.ac.be><mailto:r.sabariego at ulg.ac.be>   wrote:
>
>    You can use Gmsh but you must force the Frontal algorithm.
>   Options->Mesh->General->3D algorithm->Frontal
>
>   You can also force the algorithm in the geo file with
>   Mesh.Algorithm3D=4;
>
>   Have a loop at the attached example
>   Mesh.Algorithm3D = 4 ;
>
>   Regards,
>   Ruth
>
>
>
>
>
>   On 31/03/11 18:21, Nolwenn de Carlan wrote:
> Hello everybody,
>
>   I try to connect a structured grid with an unstructured one in 3D, without any success for the moment... (I found in the archives something concerning the same question, but it is from March 2000)
>   Can gmsh do this? If yes, how can this be done?
>   If no, can someone tell me if there is another tool to create hybrid 3D mesh ?
>
>   Best regards
>
>   Nolwenn
>
>
>
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-- 
Dr. Ir. Ruth V. Sabariego
University of Liege, Dept. of Electrical Engineering&  Computer Science,
Applied&  Computational Electromagnetics (ACE),
phone: +32-4-3663737 - fax: +32-4-3662910 - http://ace.montefiore.ulg.ac.be/