Refining quadrilateral and hexahedral element meshes

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fcdiass
Posts: 16
Joined: Fri Nov 08, 2019 8:04 pm

Refining quadrilateral and hexahedral element meshes

Post by fcdiass »

Hello everyone!

I would like to know GiD offers some way to refine meshes as proposed by Robert Schneiders in his work "Refining Quadrilateral and Hexahedral Element Meshes".

Here we have some examples of this type of refining in 2D quadrilateral meshes:
image (1).png
image (1).png (32.31 KiB) Viewed 2881 times
... and in 3D hexahedral meshes:
image (2).png
image (2).png (58.74 KiB) Viewed 2881 times
See more in: https://www.researchgate.net/profile/Ro ... Meshes.pdf
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escolano
Posts: 1915
Joined: Sun Sep 05, 1982 10:51 pm

Re: Refining quadrilateral and hexahedral element meshes

Post by escolano »

Sorry, GiD cannot do this kind of hexahedra refinements, with pattern of edge subdivisions 1:3
The octtree mesher is doing internally a similar subdivision with pattern 1:2, but in any case it is an internal feature not accessible at user level.
fcdiass
Posts: 16
Joined: Fri Nov 08, 2019 8:04 pm

Re: Refining quadrilateral and hexahedral element meshes

Post by fcdiass »

escolano wrote:Sorry, GiD cannot do this kind of hexahedra refinements, with pattern of edge subdivisions 1:3
The octtree mesher is doing internally a similar subdivision with pattern 1:2, but in any case it is an internal feature not accessible at user level.
Thanks for your quick answer! Currently, I am doing this transition manually (almost drawing one by one element).
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escolano
Posts: 1915
Joined: Sun Sep 05, 1982 10:51 pm

Re: Refining quadrilateral and hexahedral element meshes

Post by escolano »

Instead of manually you can do it at Tcl scripting level

e.g. can ask the current mesh for example with
GiD_Info Mesh

and can create new nodes and elements with the command
GiD_Mesh create|delete|edit|get|list

see GiD help on Customization->Tcl/Tk extension
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