[Gmsh] 3D interconnection of structured and unstructured grids

[Trimarchi D.]

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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