[GiDlist] Background mesh

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Helver Mauricio Barrera Cardenas

[GiDlist] Background mesh

Postby Helver Mauricio Barrera Cardenas » Fri Aug 22, 2008 11:29 am

Dear Sir.

Is it possible to somehow divide a quadrilateral mesh into a triangular one? I ask this because only triangular background meshes are allowed, yet I'm trying to apply an adaptive meshing scheme from data obtained on a quadrilateral mesh. If this is possible, I suppose that once I get the new mesh, I should be able to merge triangles back together so as to recover a quadrilateral mesh and then proceed on with an improved analysis. Am I right?
Thanks a lot for your help.

Regards

Mauricio Barrera
Universidad Autonoma de Occidente
Cali-Colombia
(0572)3188000-Ext.11359


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abelcs
Posts: 141
Joined: Mon Oct 13, 2014 9:14 am

[GiDlist] Background mesh

Postby abelcs » Mon Aug 25, 2008 11:37 am

Dear Mauricio,

You can divide a quadrilateral mesh into a triangular one using 'Mesh -
Edit Mesh-Split Elements - Quadrilateral-Triangle' option. Once you have
the new triangles they should work as the other triangular meshes, so you
can use them normally as a background mesh.

Note that the quadrilaterals can be splitted in two ways (symmetrically or
not) depending on the option 'Symmetrical structured', which can be set in
'Preferences - Meshing'.

Regards,

ABEL

_________________________________
Abel Coll Sans - Civil Engineer
CIMNE - International Center for Numerical Methods in Engineering
Ofice c-2, C1 building - Campus Nord UPC
Gran Capità s/n, 08034 Barcelona
T: 34 - 93 401 74 03 Fax: 34 - 93 40 65 17


_____

De: gidlist-admin at gid.cimne.upc.edu [mailto:gidlist-admin at gid.cimne.upc.edu]
En nombre de Helver Mauricio Barrera Cardenas
Enviado el: viernes, 22 de agosto de 2008 0:10
Para: gidlist at gid.cimne.upc.edu
Asunto: [GiDlist] Background mesh


Dear Sir.

Is it possible to somehow divide a quadrilateral mesh into a triangular one?
I ask this because only triangular background meshes are allowed, yet I'm
trying to apply an adaptive meshing scheme from data obtained on a
quadrilateral mesh. If this is possible, I suppose that once I get the new
mesh, I should be able to merge triangles back together so as to recover a
quadrilateral mesh and then proceed on with an improved analysis. Am I
right?
Thanks a lot for your help.

Regards

Mauricio Barrera
Universidad Autonoma de Occidente
Cali-Colombia
(0572)3188000-Ext.11359


_____

Este mensaje y/o sus anexos son para uso exclusivo de su destinatario
intencional. Puede contener información legalmente protegida por ser
privilegiada o confidencial. Si usted no es el destinatario intencional del
mensaje, por favor infórmenos de inmediato y elimine el mensaje y su anexos
de su computador y sistema de comunicaciones. Igualmente, le comunicamos que
cualquier retención, revisión no autorizada, distribución, divulgación,
reenvío, copia, impresión, reproducción o uso indebido de este mensaje y/o
anexos, esta estrictamente prohibida y sancionada legalmente.

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escolano
Posts: 1628
Joined: Thu Sep 18, 2014 3:31 pm

[GiDlist] Background mesh

Postby escolano » Mon Sep 08, 2008 5:45 pm

As Abel explained, you can split GiD quadrilaterals into 2 triangles (without add nodes) or 4 triangles (adding a new central node), but probably you don't need to use this tool for your background mesh.
Your own solver can write the new background mesh file writting your quadrilaterals as two triangles and setting the new required nodal sizes.

Enrique
----- Original Message -----
From: Abel Coll
To: gidlist at gid.cimne.upc.edu
Sent: Monday, August 25, 2008 12:35 PM
Subject: RE: [GiDlist] Background mesh


Dear Mauricio,

You can divide a quadrilateral mesh into a triangular one using 'Mesh - Edit Mesh-Split Elements - Quadrilateral-Triangle' option. Once you have the new triangles they should work as the other triangular meshes, so you can use them normally as a background mesh.

Note that the quadrilaterals can be splitted in two ways (symmetrically or not) depending on the option 'Symmetrical structured', which can be set in 'Preferences - Meshing'.

Regards,

ABEL

_________________________________
Abel Coll Sans - Civil Engineer
CIMNE - International Center for Numerical Methods in Engineering
Ofice c-2, C1 building - Campus Nord UPC
Gran Capità s/n, 08034 Barcelona
T: 34 - 93 401 74 03 Fax: 34 - 93 40 65 17




------------------------------------------------------------------------------
De: gidlist-admin at gid.cimne.upc.edu [mailto:gidlist-admin at gid.cimne.upc.edu] En nombre de Helver Mauricio Barrera Cardenas
Enviado el: viernes, 22 de agosto de 2008 0:10
Para: gidlist at gid.cimne.upc.edu
Asunto: [GiDlist] Background mesh


Dear Sir.

Is it possible to somehow divide a quadrilateral mesh into a triangular one? I ask this because only triangular background meshes are allowed, yet I'm trying to apply an adaptive meshing scheme from data obtained on a quadrilateral mesh. If this is possible, I suppose that once I get the new mesh, I should be able to merge triangles back together so as to recover a quadrilateral mesh and then proceed on with an improved analysis. Am I right?
Thanks a lot for your help.

Regards

Mauricio Barrera
Universidad Autonoma de Occidente
Cali-Colombia
(0572)3188000-Ext.11359


------------------------------------------------------------------------------
Este mensaje y/o sus anexos son para uso exclusivo de su destinatario intencional. Puede contener información legalmente protegida por ser privilegiada o confidencial. Si usted no es el destinatario intencional del mensaje, por favor infórmenos de inmediato y elimine el mensaje y su anexos de su computador y sistema de comunicaciones. Igualmente, le comunicamos que cualquier retención, revisión no autorizada, distribución, divulgación, reenvío, copia, impresión, reproducción o uso indebido de este mensaje y/o anexos, esta estrictamente prohibida y sancionada legalmente.
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