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[GiDlist] Mesh generating problem with GID 6.1.2

Posted: Mon Jun 20, 2005 6:03 pm
by Enrique Gutiérrez Diez
Hi there,

I have been using GID to generate triangular finite element grids for a while, I was using the 7 version to do so but on a month trial password basis, now I run out of those passwords so I renovated my company's 6 version to install it on my computer, because they had it on an old computer...anyway, I am having problems creating grids, because the program just chooses a really small element size despite the fact that I enter a different size before generating the new mesh.

I have tried with several of my old projects/grids, that I generated with the 7 version and some of them I can generate the mesh again with the pro 6 version and some of them just keep on changing the elements size automatically to something really small, say from 3 m to 0.5 m thus creating a mesh with a million nodes, when I usually run my models on 50,000 node grids...

So basically my question is, why does the GID 6.1.2 change the size of identities automatically when I hit the "generate" mesh button?? why does it do that with some projects and not with others when these projects are pretty much similar or identical?? Is there any way to avoid this??

Thanks very much for your time and help

Enrique
---------------------------------------------
Enrique Gutiérrez Diez
Tecnocean Ingeniería S.L.
C/ Balmes 184,3º2ª
08006 Barcelona
+34-93-238-8970
www.tecnocean.com
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[GiDlist] Mesh generating problem with GID 6.1.2

Posted: Tue Jun 21, 2005 9:02 pm
by escolano
Dear Sir,

Two GiD versions always have some difference, and you must not expect to obtain the same mesh with two different versions.

By default, both versions (6.1.2 and 7.x) try to correct the user assigned mesh sizes (else must be not possible to generate the mesh)

Can deactivate this automatic correction from: Utilities-Preferences - Meshing - Automatic correct sizes
But if you deactivate this option, you are responsible to manually assign more coherent sizes to geometric entities, in order to obtain a mesh.

Check also other meshing parameters values, like the element sizes transition factor.

Best regards

Enrique Escolano
----- Original Message -----
From: Enrique Gutiérrez Diez
To: gidlist at gatxan.cimne.upc.es
Sent: Monday, June 20, 2005 6:56 PM
Subject: [GiDlist] Mesh generating problem with GID 6.1.2


Hi there,

I have been using GID to generate triangular finite element grids for a while, I was using the 7 version to do so but on a month trial password basis, now I run out of those passwords so I renovated my company's 6 version to install it on my computer, because they had it on an old computer...anyway, I am having problems creating grids, because the program just chooses a really small element size despite the fact that I enter a different size before generating the new mesh.

I have tried with several of my old projects/grids, that I generated with the 7 version and some of them I can generate the mesh again with the pro 6 version and some of them just keep on changing the elements size automatically to something really small, say from 3 m to 0.5 m thus creating a mesh with a million nodes, when I usually run my models on 50,000 node grids...

So basically my question is, why does the GID 6.1.2 change the size of identities automatically when I hit the "generate" mesh button?? why does it do that with some projects and not with others when these projects are pretty much similar or identical?? Is there any way to avoid this??

Thanks very much for your time and help

Enrique
---------------------------------------------
Enrique Gutiérrez Diez
Tecnocean Ingeniería S.L.
C/ Balmes 184,3º2ª
08006 Barcelona
+34-93-238-8970
www.tecnocean.com
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