[GiDlist] Curved triangles and straight quadrilaterals

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Andrea Calaon

[GiDlist] Curved triangles and straight quadrilaterals

Postby Andrea Calaon » Thu Oct 14, 2004 4:40 pm

Curve triangles and straight quadrilaterals

Hi everyone,
I’m using GiD 7.4.7b for windows.
I have the following problem:
Surfaces with curved contours meshed with triangles have curved elements on the curved
contour lines, but if meshed with quadrilaterals the elements on the curved contours have
straight lines.



Other data:
* I use “Draw quadratic elements as curves”
* I mesh 2D surfaces embedded in 3D
* The mesh is quadratical
Am I doing or interpreting something wrong?
Thanks for any help.

Kind regards
Andrea


Andrea Calaon

Ashurst Lodge, Ashurst
Southampton, Hampshire
SO40 7AA, UK
Tel. office: +44 23 80 293 223
Fax office: +44 23 80 292 853
Mobile: +44 7766 488 225
E-mail: andrea at beasy.com
Enrique Escolano

[GiDlist] Curved triangles and straight quadrilaterals

Postby Enrique Escolano » Thu Oct 14, 2004 8:09 pm

The quadratic nodes of quadrilaterals are located over the geometric
entities (curved), same as triangles.
Are you sure than your mesh is quadratic, and are drawing the elements as
curved?
I tried with GiD 7.4.9b and it works ok.

Enrique Escolano

----- Original Message -----
From: "Andrea Calaon" andrea at beasy.com
To: gidlist at gatxan.cimne.upc.es
Sent: Thursday, October 14, 2004 5:16 PM
Subject: [GiDlist] Curved triangles and straight quadrilaterals


Curve triangles and straight quadrilaterals

Hi everyone,
I'm using GiD 7.4.7b for windows.
I have the following problem:
Surfaces with curved contours meshed with triangles have curved elements on
the curved
contour lines, but if meshed with quadrilaterals the elements on the curved
contours have
straight lines.



Other data:
* I use "Draw quadratic elements as curves"
* I mesh 2D surfaces embedded in 3D
* The mesh is quadratical
Am I doing or interpreting something wrong?
Thanks for any help.

Kind regards
Andrea


Andrea Calaon

Ashurst Lodge, Ashurst
Southampton, Hampshire
SO40 7AA, UK
Tel. office: +44 23 80 293 223
Fax office: +44 23 80 292 853
Mobile: +44 7766 488 225
E-mail: andrea at beasy.com
Andrea Calaon

[GiDlist] Curved triangles and straight quadrilaterals

Postby Andrea Calaon » Fri Oct 15, 2004 2:12 pm

Dear Enrique,
I send you 4 pictures showing what kind of mesh I get in 3D and 2D cases.
With quadrilaterals the location of the nodes is on the straight lines.
I set the mesh to quadratic thorough the menu and tried with the command "Meshing
quadratic" as well.
In preferences the "as curved" choice is selected.
I checked the coords: the nodes are on the straight lines in case of quadrilaterals and
on the curve in case of triangles.

On a Linux machine with GiD 7.4.7b it works fine.


Kind regards
Andrea

On 14 Oct 2004 at 21:05, Enrique Escolano wrote:

The quadratic nodes of quadrilaterals are located over the geometric
entities (curved), same as triangles.
Are you sure than your mesh is quadratic, and are drawing the elements as
curved?
I tried with GiD 7.4.9b and it works ok.

Enrique Escolano

----- Original Message -----
From: "Andrea Calaon" andrea at beasy.com
To: gidlist at gatxan.cimne.upc.es
Sent: Thursday, October 14, 2004 5:16 PM
Subject: [GiDlist] Curved triangles and straight quadrilaterals




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