# Problem with structured mesh in GMSH

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July 21, 2021, 11:51
Problem with structured mesh in GMSH
#1
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Hi,
I am new in the forum and in GMSH. I don't understand why Gmsh turns my structured mesh into an unstructured one. I attach the file. geo in extension .txt. Thanks in advance for your help.
Regards,
Andrea
Attached Files
 mesh.txt (2.0 KB, 8 views)

 July 21, 2021, 16:22 #2 New Member   Icaro Amorim de Carvalho Join Date: Dec 2020 Posts: 23 Rep Power: 3 Gmsh requires all surfaces to have at most 4 constituent points/lines to provide a structured mesh. You have to subdivide your geometry in surfaces where you have no more than this number of points/lines. PENGGEGE777 likes this.

 July 21, 2021, 16:25 #3 New Member   Icaro Amorim de Carvalho Join Date: Dec 2020 Posts: 23 Rep Power: 3 Besides, you have to recombine all your surfaces. Please check the tutorials from Gmsh. There you can see how to recombine the elements to get a structured mesh. In short, you have to transfinite your surfaces and then recombine. Best of luck.

July 21, 2021, 17:26
#4
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Quote:
 Originally Posted by PenPencil Besides, you have to recombine all your surfaces. Please check the tutorials from Gmsh. There you can see how to recombine the elements to get a structured mesh. In short, you have to transfinite your surfaces and then recombine. Best of luck.
Thanks for your answer, I try and I will let you know
-Andrea

July 22, 2021, 09:01
#5
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Quote:
 Originally Posted by PenPencil Besides, you have to recombine all your surfaces. Please check the tutorials from Gmsh. There you can see how to recombine the elements to get a structured mesh. In short, you have to transfinite your surfaces and then recombine. Best of luck.
I can't find the tutorials of Gmsh, have you got any links?
-Andrea

January 21, 2022, 05:04
#6
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PENG YAN
Join Date: Jul 2021
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Quote:
 Originally Posted by Andrea_p I can't find the tutorials of Gmsh, have you got any links? -Andrea
Go gmsh website, an example is the following link:

http://gmsh.info/doc/texinfo/gmsh.ht...-element-sizes

 Tags gmsh 4.7.1