[GiDlist] Semistructured volume

Moderator: GiD Team

Isabel Gil

[GiDlist] Semistructured volume

Postby Isabel Gil » Thu Apr 26, 2007 11:30 am

Hello GiD'users!

I have a little problem when I want to create a mesh.
I am working with GID 8.0.8 in Windows.


I attach my project because I don't get to make a good semistructured
volume with structured mesh
in z-direction. You can see the irregularities of the mesh if you use
the XY-plane view and the rotate trackball tool.

I don't know what I am doing wrong. I think I followed correctly the
advice that previous e-mails
gave me but perhaps I am forgetting something.

I would be really grateful if you could cast a glance at it.

Thanks in advance and best regards
Isa

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Ahmed Arbane

[GiDlist] Display Coordinate system origin.

Postby Ahmed Arbane » Thu Apr 26, 2007 6:14 pm

Hi all,

Does anyone know how to display the coordinate system origin on the GID
8.0.2?

Thanks

AA
Beasy CM
Southampton,UK
User avatar
escolano
Posts: 1627
Joined: Thu Sep 18, 2014 3:31 pm

[GiDlist] Display Coordinate system origin.

Postby escolano » Thu Apr 26, 2007 7:29 pm

Hello,

You can do it from "Utilities-Preferences ", "Grid"
Set on the "Draw axis" checkbox.

You can also activate it by clicking the rigth mouse button over the small grid of the bottom-righ.
It will appear a menu with a "show/hide axis" option.

You can also display the current numerical coordinates, from "Utilities-Preferences ", "General"
Setting the "Display coordinates" checkbox

Regards

Enrique Escolano

----- Original Message -----
From: "Ahmed Arbane" Ahmed.Arbane at beasy.com
To: "GID_FORO" gidlist at gatxan.cimne.upc.es
Sent: Thursday, April 26, 2007 4:36 PM
Subject: [GiDlist] Display Coordinate system origin.


Hi all,

Does anyone know how to display the coordinate system origin on the GID
8.0.2?

Thanks

AA
Beasy CM
Southampton,UK
_______________________________________________
GiDlist mailing list
GiDlist at gid.cimne.upc.es
http://gid.cimne.upc.es/mailman/listinfo/gidlist
User avatar
escolano
Posts: 1627
Joined: Thu Sep 18, 2014 3:31 pm

[GiDlist] Semistructured volume

Postby escolano » Thu Apr 26, 2007 8:29 pm

Hello Isabel,

I don't see the "irregularities of the mesh ". What do you want to obtain?
Can you specify some node or element number of your mesh where the mesh is wrong?

Enrique

----- Original Message -----
From: "Isabel Gil" misabel at litec.csic.es
To: "GID_FORO" gidlist at gatxan.cimne.upc.es
Sent: Thursday, April 26, 2007 11:56 AM
Subject: [GiDlist] Semistructured volume


Hello GiD'users!

I have a little problem when I want to create a mesh.
I am working with GID 8.0.8 in Windows.


I attach my project because I don't get to make a good semistructured
volume with structured mesh
in z-direction. You can see the irregularities of the mesh if you use
the XY-plane view and the rotate trackball tool.

I don't know what I am doing wrong. I think I followed correctly the
advice that previous e-mails
gave me but perhaps I am forgetting something.

I would be really grateful if you could cast a glance at it.

Thanks in advance and best regards
Isa


User avatar
miguel
Posts: 346
Joined: Thu Sep 25, 2014 9:04 am

[GiDlist] Semistructured volume

Postby miguel » Fri Apr 27, 2007 7:43 am

Hi,

If you mean that the elements are quite distorted, i think it's because you
have assigned element size of '2' for some volumes (layers 'capa1_a' and
'capa1_b' with a height of 0.002) and '4' for others (layers 'capa2_a' and
'capa2_b' with a height of 0.002). Some details of the surfaces conforming
the volumes is just 0.001. You can see it at 'ig_volume_size_1.png'.

And, for instance, at the layer 'capa1_b', there are surfaces with element
size assigned of 0.0059 (and the width of the surface is just 0.002) and
just beside them surfaces with element size of 0.000325, 15 times less, as
you can see in the image 'ig_surface_size_1.png', resulting in the mesh
shown in 'ig_mesh_zoom_1.png'.
Best regards,

Miguel

-----Mensaje original-----
De: gidlist-admin at gatxan.cimne.upc.edu
[mailto:gidlist-admin at gatxan.cimne.upc.edu] En nombre de Isabel Gil
Enviado el: jueves, 26 de abril de 2007 11:56
Para: GID_FORO
Asunto: [GiDlist] Semistructured volume

Hello GiD'users!

I have a little problem when I want to create a mesh.
I am working with GID 8.0.8 in Windows.


I attach my project because I don't get to make a good semistructured
volume with structured mesh
in z-direction. You can see the irregularities of the mesh if you use
the XY-plane view and the rotate trackball tool.

I don't know what I am doing wrong. I think I followed correctly the
advice that previous e-mails
gave me but perhaps I am forgetting something.

I would be really grateful if you could cast a glance at it.

Thanks in advance and best regards
Isa

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Isabel Gil

[GiDlist] Semistructured volume

Postby Isabel Gil » Fri Apr 27, 2007 5:42 pm

Hello!

First of all, thanks for your reply.

Your are right with the so different size of mesh elements I am using,
but if you, in the previous project I sent you, put "RENDER-normal" and
put on and off the "layer capa2_a", you can see that different lines
appear (you can see this effect at first sight on the left at the bottom
with only the "layer capa1_a" on and putting the "layer capa2_a" on and
off, with the view of XY plane).
Do you mean that these irregularities in the mesh is due to my bad size
election?

Again, thank-you very much in advance.

Best regards!
Isa

Miguel Pasenau wrote:
Hi,

If you mean that the elements are quite distorted, i think it's because you
have assigned element size of '2' for some volumes (layers 'capa1_a' and
'capa1_b' with a height of 0.002) and '4' for others (layers 'capa2_a' and
'capa2_b' with a height of 0.002). Some details of the surfaces conforming
the volumes is just 0.001. You can see it at 'ig_volume_size_1.png'.

And, for instance, at the layer 'capa1_b', there are surfaces with element
size assigned of 0.0059 (and the width of the surface is just 0.002) and
just beside them surfaces with element size of 0.000325, 15 times less, as
you can see in the image 'ig_surface_size_1.png', resulting in the mesh
shown in 'ig_mesh_zoom_1.png'.
Best regards,

Miguel

-----Mensaje original-----
De: gidlist-admin at gatxan.cimne.upc.edu
[mailto:gidlist-admin at gatxan.cimne.upc.edu] En nombre de Isabel Gil
Enviado el: jueves, 26 de abril de 2007 11:56
Para: GID_FORO
Asunto: [GiDlist] Semistructured volume

Hello GiD'users!

I have a little problem when I want to create a mesh.
I am working with GID 8.0.8 in Windows.


I attach my project because I don't get to make a good semistructured
volume with structured mesh
in z-direction. You can see the irregularities of the mesh if you use
the XY-plane view and the rotate trackball tool.

I don't know what I am doing wrong. I think I followed correctly the
advice that previous e-mails
gave me but perhaps I am forgetting something.

I would be really grateful if you could cast a glance at it.

Thanks in advance and best regards
Isa



------------------------------------------------------------------------


------------------------------------------------------------------------


------------------------------------------------------------------------

User avatar
escolano
Posts: 1627
Joined: Thu Sep 18, 2014 3:31 pm

[GiDlist] Semistructured volume

Postby escolano » Fri Apr 27, 2007 6:35 pm

I think that we didn't understand your meaning of "irregularities in the mesh"
I think that you don't want to say "elements with bad angles or sizes", and what you want
is that all extruded nodes have exactly the same XY proyection. Is not?

Structured or semi-structured meshes will not generate aligned-like nodes in the extrusion direction, the algorithm is not a simple
translation, is more general (lateral surfaces can be curved, and both tops must have the same number of boundaries, but can have
different shape)

Last 8.1.x beta versions have an "special option" to try to force this alignement if possible, by setting the GiD variable
AlignSemiStructuredNodes to 1
escape escape escape utilities variables AlignSemiStructuredNodes 1
(but your 8.0.8 official version doesn't has this option)

Next week we are releasing a new beta version 8.1.3 that also has a new unstructured quadrilateral meshing algorithm,
Obtained quadrilaterals will have much better shape quality. Can set this mesher with the variable:
escape escape escape utilities variables QuadrilateralMesher 1

Regards

Enrique Escolano

----- Original Message -----
From: "Isabel Gil" misabel at litec.csic.es
To: gidlist at gatxan.cimne.upc.edu
Sent: Friday, April 27, 2007 6:12 PM
Subject: Re: [GiDlist] Semistructured volume


Hello!

First of all, thanks for your reply.

Your are right with the so different size of mesh elements I am using,
but if you, in the previous project I sent you, put "RENDER-normal" and
put on and off the "layer capa2_a", you can see that different lines
appear (you can see this effect at first sight on the left at the bottom
with only the "layer capa1_a" on and putting the "layer capa2_a" on and
off, with the view of XY plane).
Do you mean that these irregularities in the mesh is due to my bad size
election?

Again, thank-you very much in advance.

Best regards!
Isa

Miguel Pasenau wrote:
Hi,

If you mean that the elements are quite distorted, i think it's because you
have assigned element size of '2' for some volumes (layers 'capa1_a' and
'capa1_b' with a height of 0.002) and '4' for others (layers 'capa2_a' and
'capa2_b' with a height of 0.002). Some details of the surfaces conforming
the volumes is just 0.001. You can see it at 'ig_volume_size_1.png'.

And, for instance, at the layer 'capa1_b', there are surfaces with element
size assigned of 0.0059 (and the width of the surface is just 0.002) and
just beside them surfaces with element size of 0.000325, 15 times less, as
you can see in the image 'ig_surface_size_1.png', resulting in the mesh
shown in 'ig_mesh_zoom_1.png'.
Best regards,

Miguel

-----Mensaje original-----
De: gidlist-admin at gatxan.cimne.upc.edu
[mailto:gidlist-admin at gatxan.cimne.upc.edu] En nombre de Isabel Gil
Enviado el: jueves, 26 de abril de 2007 11:56
Para: GID_FORO
Asunto: [GiDlist] Semistructured volume

Hello GiD'users!

I have a little problem when I want to create a mesh.
I am working with GID 8.0.8 in Windows.


I attach my project because I don't get to make a good semistructured
volume with structured mesh
in z-direction. You can see the irregularities of the mesh if you use
the XY-plane view and the rotate trackball tool.

I don't know what I am doing wrong. I think I followed correctly the
advice that previous e-mails
gave me but perhaps I am forgetting something.

I would be really grateful if you could cast a glance at it.

Thanks in advance and best regards
Isa



------------------------------------------------------------------------


------------------------------------------------------------------------


------------------------------------------------------------------------


_______________________________________________
GiDlist mailing list
GiDlist at gid.cimne.upc.es
http://gid.cimne.upc.es/mailman/listinfo/gidlist
Isabel Gil

[GiDlist] Semistructured volume

Postby Isabel Gil » Mon Apr 30, 2007 10:23 am

Hi!

Thanks for your reply. I answer through your e-mail:

Enrique Escolano wrote:
I think that we didn't understand your meaning of "irregularities in the mesh"
I think that you don't want to say "elements with bad angles or sizes", and what you want
is that all extruded nodes have exactly the same XY proyection. Is not?

Yes, you are right. I meant just what you have described.
Structured or semi-structured meshes will not generate aligned-like nodes in the extrusion direction, the algorithm is not a simple
translation, is more general (lateral surfaces can be curved, and both tops must have the same number of boundaries, but can have
different shape)

Last 8.1.x beta versions have an "special option" to try to force this alignement if possible, by setting the GiD variable
AlignSemiStructuredNodes to 1
escape escape escape utilities variables AlignSemiStructuredNodes 1
(but your 8.0.8 official version doesn't has this option)

Then, I have just downloaded Gid8.1.2b-win-x32.exe, which is a beta
version but I am not able to find the GiD variable
AlignSemiStructuredNodes and to put it to 1.
Could you say to me where it is exactly?
Thanks in advance and best regards
Isa
ftp://gid.cimne.upc.es/pub/gid_adds/Windows/GiD8.1.2b-win-x32.exe
Next week we are releasing a new beta version 8.1.3 that also has a new unstructured quadrilateral meshing algorithm,
Obtained quadrilaterals will have much better shape quality. Can set this mesher with the variable:
escape escape escape utilities variables QuadrilateralMesher 1

Regards

Enrique Escolano

----- Original Message -----
From: "Isabel Gil" misabel at litec.csic.es
To: gidlist at gatxan.cimne.upc.edu
Sent: Friday, April 27, 2007 6:12 PM
Subject: Re: [GiDlist] Semistructured volume



Hello!

First of all, thanks for your reply.

Your are right with the so different size of mesh elements I am using,
but if you, in the previous project I sent you, put "RENDER-normal" and
put on and off the "layer capa2_a", you can see that different lines
appear (you can see this effect at first sight on the left at the bottom
with only the "layer capa1_a" on and putting the "layer capa2_a" on and
off, with the view of XY plane).
Do you mean that these irregularities in the mesh is due to my bad size
election?

Again, thank-you very much in advance.

Best regards!
Isa

Miguel Pasenau wrote:

Hi,

If you mean that the elements are quite distorted, i think it's because you
have assigned element size of '2' for some volumes (layers 'capa1_a' and
'capa1_b' with a height of 0.002) and '4' for others (layers 'capa2_a' and
'capa2_b' with a height of 0.002). Some details of the surfaces conforming
the volumes is just 0.001. You can see it at 'ig_volume_size_1.png'.

And, for instance, at the layer 'capa1_b', there are surfaces with element
size assigned of 0.0059 (and the width of the surface is just 0.002) and
just beside them surfaces with element size of 0.000325, 15 times less, as
you can see in the image 'ig_surface_size_1.png', resulting in the mesh
shown in 'ig_mesh_zoom_1.png'.
Best regards,

Miguel

-----Mensaje original-----
De: gidlist-admin at gatxan.cimne.upc.edu
[mailto:gidlist-admin at gatxan.cimne.upc.edu] En nombre de Isabel Gil
Enviado el: jueves, 26 de abril de 2007 11:56
Para: GID_FORO
Asunto: [GiDlist] Semistructured volume

Hello GiD'users!

I have a little problem when I want to create a mesh.
I am working with GID 8.0.8 in Windows.


I attach my project because I don't get to make a good semistructured
volume with structured mesh
in z-direction. You can see the irregularities of the mesh if you use
the XY-plane view and the rotate trackball tool.

I don't know what I am doing wrong. I think I followed correctly the
advice that previous e-mails
gave me but perhaps I am forgetting something.

I would be really grateful if you could cast a glance at it.

Thanks in advance and best regards
Isa



------------------------------------------------------------------------


------------------------------------------------------------------------


------------------------------------------------------------------------


_______________________________________________
GiDlist mailing list
GiDlist at gid.cimne.upc.es
http://gid.cimne.upc.es/mailman/listinfo/gidlist


_______________________________________________
GiDlist mailing list
GiDlist at gid.cimne.upc.es
http://gid.cimne.upc.es/mailman/listinfo/gidlist

Ahmed Arbane

[GiDlist] Uncollapse function

Postby Ahmed Arbane » Tue May 01, 2007 6:38 pm

Hi,

I created a surface in a new layer named "surface1" from lines "By
contour" which belong to another layer named "Box".

This new surface has no sub-entities (lines and points) which I would
like to generate in the same layer "surface1".

I used the function "Uncollapse", it creates the sub-entities required,
however these sub-entities belong to the layer "Box" even if "surface1"
is the layer in use.

How could I have it done without using the function "send to" in the
layer interface window ?

Thanks

Ahmed
Beasy CM
Southampton, UK
User avatar
escolano
Posts: 1627
Joined: Thu Sep 18, 2014 3:31 pm

[GiDlist] Semistructured volume

Postby escolano » Wed May 02, 2007 11:01 am

First you can set visible the "rigth buttons"

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