Hi Benjamin,

There is a corrected bug in the 8.0.2 version, that will be available in the

next official version. It will be public very soon (today or the next week),

so you will be able to mesh your model.

I thought it was already fixed in the 8.0.2 version, so I’m sorry for have

not telling this to you before.

Thanks for notifying us this irregular behaviour of GiD.

Best regards,

ABEL

__________________________________________________________

Abel Coll Sans

CIMNE - International Center for Numerical Methods in Engineering

Office C2 - C1Building - Campus Nord UPC

Gran Capità s/n, 08034 Barcelona

Tfn: 34 - 93 401 74 03 Fax: 34 - 93 401 65 17

mailto:

abelcs at cimne.upc.edu abelcs at cimne.upc.edu _________________________________________________________

_____

De:

gidlist-admin at gatxan.cimne.upc.edu[mailto:

gidlist-admin at gatxan.cimne.upc.edu] En nombre de Benjamin Sanderse

Enviado el: jueves, 21 de diciembre de 2006 23:10

Para:

gidlist at gatxan.cimne.upc.eduAsunto: Re: [GiDlist] quadrilaterals in circles

Hi Abel,

I get your point yes, but still I am not able to get it working myself.

If I define the interior cylinder volume as structured of semi-structured

GiD crashes. I am using version 8.0.2, so that should work...?

Benjamin

----- Original Message -----

From: Abel Coll mailto:

abelcs at cimne.upc.edu To:

gidlist at gatxan.cimne.upc.edu Sent: Wednesday, December 20, 2006 4:48 AM

Subject: RE: [GiDlist] quadrilaterals in circles

Hello,

You have to ensure that the line divisions are compatible.

For example: if you want to mesh one four-sided surface with structured

quadrilateral and you assign 2 and 3 number of divisions to opposite lines

of the surface, GiD will mesh both lines with 3 number of divisions, to make

the mesh compatible. May be this is the reason why your circle lines are

meshed with an odd number of divisions, even if you assign an even number of

it (in your case 2).

A part from that, which GiD version are you using? I recommend you to use

the last official version (8.0.2), because there are some bug fixed from

older versions.

Regards,

ABEL

__________________________________________________________

Abel Coll Sans

CIMNE - International Center for Numerical Methods in Engineering

Office C2 - C1Building - Campus Nord UPC

Gran Capità s/n, 08034 Barcelona

Tfn: 34 - 93 401 74 03 Fax: 34 - 93 401 65 17

mailto:

abelcs at cimne.upc.edu abelcs at cimne.upc.edu _________________________________________________________

_____

De:

gidlist-admin at gatxan.cimne.upc.edu[mailto:

gidlist-admin at gatxan.cimne.upc.edu] En nombre de Benjamin Sanderse

Enviado el: martes, 19 de diciembre de 2006 21:50

Para:

gidlist at gatxan.cimne.upc.eduAsunto: Re: [GiDlist] quadrilaterals in circles

I see that your mesh is indeed working, but I cannot discover what you

changed to make it work. I defined the volume as structured mesh and the

front and end circles as unstructured. I still get the error messages that

for the circular surface 'all contour lines must have an even number of

sides'. The circles have 8 sides and I defined two elements on each side. I

do not see why this doesn't work. Can you give me your approach?

Benjamin

----- Original Message -----

From: Abel Coll mailto:

abelcs at cimne.upc.edu To:

gidlist at gatxan.cimne.upc.edu Sent: Tuesday, December 19, 2006 12:12 PM

Subject: RE: [GiDlist] quadrilaterals in circles

Hello,

It seams that you had not assigned compatible meshing data to entities.

Using GiD, hexahedra elements can only be done using structured or

semi-structured volume mesh, so all the volumes must have this kind of

meshes. I send you an example of a possible mesh of your model.

Regards,

ABEL

__________________________________________________________

Abel Coll Sans

CIMNE - International Center for Numerical Methods in Engineering

Office C2 - C1Building - Campus Nord UPC

Gran Capità s/n, 08034 Barcelona

Tfn: 34 - 93 401 74 03 Fax: 34 - 93 401 65 17

mailto:

abelcs at cimne.upc.edu abelcs at cimne.upc.edu _________________________________________________________

_____

De:

gidlist-admin at gatxan.cimne.upc.edu[mailto:

gidlist-admin at gatxan.cimne.upc.edu] En nombre de Benjamin Sanderse

Enviado el: martes, 19 de diciembre de 2006 16:32

Para:

gidlist at gatxan.cimne.upc.eduAsunto: Re: [GiDlist] quadrilaterals in circles

And the attachment....

----- Original Message -----

From: Enrique mailto:

escolano at cimne.upc.edu Escolano

To:

gidlist at gatxan.cimne.upc.edu Sent: Tuesday, December 19, 2006 5:59 AM

Subject: Re: [GiDlist] quadrilaterals in circles

You can also try the other option pointed by Abel: subdivide the circle in

4-sided structured parts.

I attach an image of two possible patterns. The second one can have

acceptable quality.

----- Original Message -----

From: Benjamin Sanderse mailto:

bsanderse at gmail.com To:

gidlist at gatxan.cimne.upc.es Sent: Tuesday, December 19, 2006 1:26 AM

Subject: [GiDlist] quadrilaterals in circles

Hello all,

I have the following problem: I want to simulate the flow around a cylinder

in 3D. The cylinder must be detached from the sides of the domain in order

to see edge effects. The code that I am using accepts only hex elements;

basically I use quadrilaterals extruded tot a third dimension. The problem

now lies in modelling the two ends (circles) of the cylinder, since GiD does

not allow me to model them as quads... What is the solution for this?

Benjamin

-------------- next part --------------

An HTML attachment was scrubbed...

URL:

http://listas.cimne.upc.edu/pipermail/gidlist/attachments/20061222/2ef9a6e5/attachment.htm -------------- next part --------------

A non-text attachment was scrubbed...

Name: not available

Type: image/jpeg

Size: 20792 bytes

Desc: not available

Url :

http://listas.cimne.upc.edu/pipermail/gidlist/attachments/20061222/2ef9a6e5/attachment.jpeg -------------- next part --------------

A non-text attachment was scrubbed...

Name: not available

Type: image/jpeg

Size: 28555 bytes

Desc: not available

Url :

http://listas.cimne.upc.edu/pipermail/gidlist/attachments/20061222/2ef9a6e5/attachment-0001.jpeg