Problem with structured mesh in GMSH

Andrea_p · July 21, 2021, 10:51

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

PenPencil · July 21, 2021, 15:22

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.

PenPencil · July 21, 2021, 15:25

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.

Andrea_p · July 21, 2021, 16:26

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

Andrea_p · July 22, 2021, 08:01

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

PENGGEGE777 · January 21, 2022, 04:04

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

July 21, 2021, 15:22		#2
PenPencil New Member Icaro Amorim de Carvalho Join Date: Dec 2020 Posts: 24 Rep Power: 5	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.

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July 21, 2021, 15:25		#3
PenPencil New Member Icaro Amorim de Carvalho Join Date: Dec 2020 Posts: 24 Rep Power: 5	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.