Cylinder

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anicakabanica
Posts: 8
Joined: Sun Nov 19, 2017 4:23 pm

Cylinder

Post by anicakabanica »

Hello everybody, is it possible to mesh cylinder with hexahedra elements? Thank You!
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escolano
Posts: 1918
Joined: Sun Sep 05, 1982 10:51 pm

Re: Cylinder

Post by escolano »

You can only mesh with hexahedra volumes structured (6-faces topologically like a box) or semi-structured (extruded volumes with two 'equivalent' tops and all lateral surfaces of 4-sides, topologically like a square)

The cylinder in particular is a semi-structured shape,
can mesh it with semi-structured hexahedra with
Mesh->Semi structured->Volumes
select the number of divisions in the structured direction (the extrusion direction)
and then the volumes
and by default elements are triangle for surfaces and tetrahedra for volumes, to change it
Mesh->Element type->Hexahedra
and select the volume
then could generate your mesh

To create a structured mesh is necessary to modify the geometry, splitting the cylinder volume in 6-sided volumes (not always easy or possible in general)
anicakabanica
Posts: 8
Joined: Sun Nov 19, 2017 4:23 pm

Re: Cylinder

Post by anicakabanica »

Is it possible to mesh this part ONLY with hexahedra elements? I assigned the element type hexahedra, but GiD generates linear elements, too.
anicakabanica
Posts: 8
Joined: Sun Nov 19, 2017 4:23 pm

Re: Cylinder

Post by anicakabanica »

I want to mesh this part only with hexahedra elements.
I want to mesh this part only with hexahedra elements.
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anicakabanica
Posts: 8
Joined: Sun Nov 19, 2017 4:23 pm

Re: Cylinder

Post by anicakabanica »

I've managed it. The problem was that I didn't erase the line that served for sweep operation and GiD automatically added linear elements to that line. Sorry for disturbing :)
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