[GiDlist] CAN'T generate volume mesh

Moderator: GiD Team

Henry Liu

[GiDlist] CAN'T generate volume mesh

Postby Henry Liu » Tue Oct 12, 2004 4:26 pm

Hi, everyone

I am a new user of GiD. I got a question about how to
generate volume mesh from surface geometry or surface
mesh.

My problem is in twofold. First, I have a surface
geometry (see attachment volume_bad.geo -- an example
in advanced tutorial, I did not find the respective
solution there) but I can't generate volume entity (by
creating a volume in GiD), thus I can't generate
volume mesh. Second, I have a surface mesh and I can
generate volume entity (by creating volume with search
option in GiD). When I am trying to generate volume
mesh, it gave me wrong message like (problematic
surfaces: 14) and so on.

Could anyone tell wether this is due to wrong surface
geometry or surface mesh, or is there any way out to
fix it manually on problematic surfaces?

thanks

Henry Liu

=====
Henry Liu

______________________________________________________________________
Post your free ad now! http://personals.yahoo.ca
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Rafael Doig

[GiDlist] CAN'T generate volume mesh

Postby Rafael Doig » Tue Oct 12, 2004 11:41 pm

Hi Henry,

I use to generate a volume mesh (hexahedras) from a surface like
following:

1. Once you finish the geometry (surface), just mesh it. I.e with
quadrilateral elements.

2. Go to menu point [utilities] = [copy]

3. A copy window appears:
- select entities type = Elements
- Transformation = i.e. Translation
- select or insert first and second point (that is the sweep path)
- THEN Do extrude = VOLUMES

Volume elements will be created. In this case hexahedras.

In the same way you can extrude a surface (geo) to a volume (geo) and
then mesh the volume.

I hope, it solve your problem.

Regards,
Rafael



On Wed, 2004-10-13 at 00:09, Henry Liu wrote:
Hi, everyone

I am a new user of GiD. I got a question about how to
generate volume mesh from surface geometry or surface
mesh.

My problem is in twofold. First, I have a surface
geometry (see attachment volume_bad.geo -- an example
in advanced tutorial, I did not find the respective
solution there) but I can't generate volume entity (by
creating a volume in GiD), thus I can't generate
volume mesh. Second, I have a surface mesh and I can
generate volume entity (by creating volume with search
option in GiD). When I am trying to generate volume
mesh, it gave me wrong message like (problematic
surfaces: 14) and so on.

Could anyone tell wether this is due to wrong surface
geometry or surface mesh, or is there any way out to
fix it manually on problematic surfaces?

thanks

Henry Liu

=====
Henry Liu

______________________________________________________________________
Post your free ad now! http://personals.yahoo.ca
Enrique Escolano

[GiDlist] CAN'T generate volume mesh

Postby Enrique Escolano » Wed Oct 13, 2004 3:25 pm

The file 'volume_bad' has duplicated four lines: 6 - 20, and 7 - 29, then
cannot closed a volume.
(can see the entities number with View-Label-All)

You can see also graphically this problem with: Utilities-Draw
higher-Lines

To solve it, can collapse duplicated (not shared) entities:
Utilities-Collapse-Model

Then can create the volume, without problems, selecting all surfaces as
boundary.

Regards

Enrique Escolano

----- Original Message -----
From: "Henry Liu" masterdailymemo at yahoo.ca
To: gidlist at gatxan.cimne.upc.es
Sent: Tuesday, October 12, 2004 5:09 PM
Subject: [GiDlist] CAN'T generate volume mesh


Hi, everyone

I am a new user of GiD. I got a question about how to
generate volume mesh from surface geometry or surface
mesh.

My problem is in twofold. First, I have a surface
geometry (see attachment volume_bad.geo -- an example
in advanced tutorial, I did not find the respective
solution there) but I can't generate volume entity (by
creating a volume in GiD), thus I can't generate
volume mesh. Second, I have a surface mesh and I can
generate volume entity (by creating volume with search
option in GiD). When I am trying to generate volume
mesh, it gave me wrong message like (problematic
surfaces: 14) and so on.

Could anyone tell wether this is due to wrong surface
geometry or surface mesh, or is there any way out to
fix it manually on problematic surfaces?

thanks

Henry Liu

=====
Henry Liu

______________________________________________________________________
Post your free ad now! http://personals.yahoo.ca

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