[GiDlist] Mixed meshes

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Smith, Mark

[GiDlist] Mixed meshes

Post by Smith, Mark »

Hi Enrique
Thanks for the reply. The tetrahedral structured mesh might do the job I
will have to try. I wanted hexahedra ideally as they are not as stiff a
shape, also I imagine their shape quality will not be as good, I did not
realise you could do structured tet meshes, thanks for the prompt reply.
Regards
mark



Subject: [GiDlist] Mixed meshes



From: Enrique Escolano gidlist at gid.cimne.upc.edu
Wed Jul 14 15:48:02 2010


Is possible to do it, but the elements must be compatible: e.g. the
structured part instead of generate hexahedra must be set to generate
tetrahedra (because triangular faces are shared with the unstructured
part of tetrahedra)

To set the dome to be meshed as structured its volumes must have exactly
6
faces: I rebuilt again this part by revolution, to have this 6-faced
volumes.

I attach my model including the mesh (I set a number of 5 structured
divisions for all directions)

Regards

Enrique

----- Original Message -----
From: "Smith, Mark" Mark.Smith at linx.co.uk
To: gidlist at gid.cimne.upc.edu
Sent: Wednesday, July 14, 2010 2:14 PM
Subject: [GiDlist] Mixed meshes


Gid ver 9.0.4

Hi Gid team
Is it possible to produce different mesh types in different regions? In
the attached simple test model I want to be able to produce a structured
mesh in the "dome" region and a tetrahedral mesh in the "cap" region,
both meshes can and will share the same nodes at the interface between
the 2 bodies so I think it should be possible but can't figure out a way
to do it ;-( Any Ideas?
Regards
mark


Please be advised that this email may contain confidential
information. If you are not the intended recipient, please notify us
by email by replying to the sender and delete this message. The
sender disclaims that the content of this email constitutes an offer
to enter into, or the acceptance of, any agreement; provided that the
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User avatar
abelcs
Posts: 146
Joined: Mon Oct 13, 2014 9:14 am

[GiDlist] Mixed meshes

Post by abelcs »

Dear Mark,

If the model is like the one you sent (without any "more complex" part), you
also can try to subdivide the cap region so as it will be formed by 6-faced
volumes. Doing so, you will be able to generate structured hexahedras.

Note that you also have the semi-structured option for generating
hexahedras. This option can be applied to topologically prismatic volumes,
and can generate hexas (structured in the prismatic direction of the volume)
"connecting" the mesh of the tops of the volume, which can be unstructured
(quads in this case).

Kind regars,

ABEL


_________________________________
Abel Coll Sans - Civil Engineer
CIMNE - International Center for Numerical Methods in Engineering
Ofice c-2, C1 building - Campus Nord UPC
Gran Capità s/n, 08034 Barcelona
T: 34 - 93 401 74 03 Fax: 34 - 93 40 65 17
________________________________



AVISO IMPORTANTE

Los datos de carácter personal contenidos en el mensaje, se registrarán en
un fichero para facilitar la gestión de las comunicaciones de CIMNE. Se
pueden ejercitar los derechos de acceso, rectificación, cancelación y
oposición por escrito, dirigiéndose a nuestras oficinas de CIMNE, Gran
Capitán s/n, Edificio C1 - Campus Norte UPC, 08034 Barcelona, España.

AVÍS IMPORTANT

Les dades de caràcter personal contingudes en aquest missatge es registraran
en un fitxer per facilitar la gestió de les comunicacions del CIMNE. Es
poden exercir els drets d'accés, rectificació, cancel·lació i oposició, per
escrit a les nostres oficines del CIMNE, Gran Capità s/n, Edifici C1, Campus
Nord UPC, 08034 Barcelona, Espanya.

IMPORTANT NOTICE

All personal data contained in this mail will be processed confidentially
and stored in a file property of CIMNE in order to manage corporate
communications. You may exercise the right of access, rectification,
deletion and objection by letter sent to CIMNE, Gran Capitán, Edificio C1 -
Campus Norte UPC, 08034 Barcelona, Spain.

________________________________




-----Mensaje original-----
De: gidlist-admin at gid.cimne.upc.edu [mailto:gidlist-admin at gid.cimne.upc.edu]
En nombre de Smith, Mark
Enviado el: miércoles, 14 de julio de 2010 16:18
Para: gidlist at gid.cimne.upc.edu
Asunto: RE: [GiDlist] Mixed meshes

Hi Enrique
Thanks for the reply. The tetrahedral structured mesh might do the job I
will have to try. I wanted hexahedra ideally as they are not as stiff a
shape, also I imagine their shape quality will not be as good, I did not
realise you could do structured tet meshes, thanks for the prompt reply.
Regards
mark



Subject: [GiDlist] Mixed meshes



From: Enrique Escolano gidlist at gid.cimne.upc.edu
Wed Jul 14 15:48:02 2010


Is possible to do it, but the elements must be compatible: e.g. the
structured part instead of generate hexahedra must be set to generate
tetrahedra (because triangular faces are shared with the unstructured part
of tetrahedra)

To set the dome to be meshed as structured its volumes must have exactly
6
faces: I rebuilt again this part by revolution, to have this 6-faced
volumes.

I attach my model including the mesh (I set a number of 5 structured
divisions for all directions)

Regards

Enrique

----- Original Message -----
From: "Smith, Mark" Mark.Smith at linx.co.uk
To: gidlist at gid.cimne.upc.edu
Sent: Wednesday, July 14, 2010 2:14 PM
Subject: [GiDlist] Mixed meshes


Gid ver 9.0.4

Hi Gid team
Is it possible to produce different mesh types in different regions? In the
attached simple test model I want to be able to produce a structured mesh in
the "dome" region and a tetrahedral mesh in the "cap" region, both meshes
can and will share the same nodes at the interface between the 2 bodies so I
think it should be possible but can't figure out a way
to do it ;-( Any Ideas?
Regards
mark


Please be advised that this email may contain confidential information. If
you are not the intended recipient, please notify us by email by replying to
the sender and delete this message. The sender disclaims that the content
of this email constitutes an offer to enter into, or the acceptance of, any
agreement; provided that the foregoing does not invalidate the binding
effect of any digital or other electronic reproduction of a manual signature
that is included in any attachment.
_______________________________________________
GiDlist mailing list
GiDlist at gid.cimne.upc.edu
http://gid.cimne.upc.es/mailman/listinfo/gidlist
Smith, Mark

[GiDlist] Mixed meshes

Post by Smith, Mark »

Hi Abel
Thanks for your reply. I agree I can split the volumes into 6 faced regions but this is time consuming as it has to be done manually and any change to the geometry means this has to be repeated all over again ;-( I have used the semi structured approach before but this also requires lots of manual intervention.
Are there any plans to introduce a fully automatic hexahedral mesher?

Regards
mark

-----Original Message-----
From: gidlist-admin at gid.cimne.upc.edu [mailto:gidlist-admin at gid.cimne.upc.edu] On Behalf Of Abel Coll
Sent: 14 July 2010 16:42
To: gidlist at gid.cimne.upc.edu
Subject: RE: [GiDlist] Mixed meshes

Dear Mark,

If the model is like the one you sent (without any "more complex" part), you also can try to subdivide the cap region so as it will be formed by 6-faced volumes. Doing so, you will be able to generate structured hexahedras.

Note that you also have the semi-structured option for generating hexahedras. This option can be applied to topologically prismatic volumes, and can generate hexas (structured in the prismatic direction of the volume) "connecting" the mesh of the tops of the volume, which can be unstructured (quads in this case).

Kind regars,

ABEL


_________________________________
Abel Coll Sans - Civil Engineer
CIMNE - International Center for Numerical Methods in Engineering Ofice c-2, C1 building - Campus Nord UPC Gran Capità s/n, 08034 Barcelona
T: 34 - 93 401 74 03 Fax: 34 - 93 40 65 17 ________________________________



AVISO IMPORTANTE

Los datos de carácter personal contenidos en el mensaje, se registrarán en un fichero para facilitar la gestión de las comunicaciones de CIMNE. Se pueden ejercitar los derechos de acceso, rectificación, cancelación y oposición por escrito, dirigiéndose a nuestras oficinas de CIMNE, Gran Capitán s/n, Edificio C1 - Campus Norte UPC, 08034 Barcelona, España.

AVÍS IMPORTANT

Les dades de caràcter personal contingudes en aquest missatge es registraran en un fitxer per facilitar la gestió de les comunicacions del CIMNE. Es poden exercir els drets d'accés, rectificació, cancel·lació i oposició, per escrit a les nostres oficines del CIMNE, Gran Capità s/n, Edifici C1, Campus Nord UPC, 08034 Barcelona, Espanya.

IMPORTANT NOTICE

All personal data contained in this mail will be processed confidentially and stored in a file property of CIMNE in order to manage corporate communications. You may exercise the right of access, rectification, deletion and objection by letter sent to CIMNE, Gran Capitán, Edificio C1 - Campus Norte UPC, 08034 Barcelona, Spain.

________________________________




-----Mensaje original-----
De: gidlist-admin at gid.cimne.upc.edu [mailto:gidlist-admin at gid.cimne.upc.edu]
En nombre de Smith, Mark
Enviado el: miércoles, 14 de julio de 2010 16:18
Para: gidlist at gid.cimne.upc.edu
Asunto: RE: [GiDlist] Mixed meshes

Hi Enrique
Thanks for the reply. The tetrahedral structured mesh might do the job I will have to try. I wanted hexahedra ideally as they are not as stiff a shape, also I imagine their shape quality will not be as good, I did not realise you could do structured tet meshes, thanks for the prompt reply.
Regards
mark



Subject: [GiDlist] Mixed meshes



From: Enrique Escolano gidlist at gid.cimne.upc.edu
Wed Jul 14 15:48:02 2010


Is possible to do it, but the elements must be compatible: e.g. the structured part instead of generate hexahedra must be set to generate tetrahedra (because triangular faces are shared with the unstructured part of tetrahedra)

To set the dome to be meshed as structured its volumes must have exactly
6
faces: I rebuilt again this part by revolution, to have this 6-faced volumes.

I attach my model including the mesh (I set a number of 5 structured divisions for all directions)

Regards

Enrique

----- Original Message -----
From: "Smith, Mark" Mark.Smith at linx.co.uk
To: gidlist at gid.cimne.upc.edu
Sent: Wednesday, July 14, 2010 2:14 PM
Subject: [GiDlist] Mixed meshes


Gid ver 9.0.4

Hi Gid team
Is it possible to produce different mesh types in different regions? In the attached simple test model I want to be able to produce a structured mesh in the "dome" region and a tetrahedral mesh in the "cap" region, both meshes can and will share the same nodes at the interface between the 2 bodies so I think it should be possible but can't figure out a way
to do it ;-( Any Ideas?
Regards
mark


Please be advised that this email may contain confidential information. If you are not the intended recipient, please notify us by email by replying to the sender and delete this message. The sender disclaims that the content of this email constitutes an offer to enter into, or the acceptance of, any agreement; provided that the foregoing does not invalidate the binding effect of any digital or other electronic reproduction of a manual signature that is included in any attachment.
_______________________________________________
GiDlist mailing list
GiDlist at gid.cimne.upc.edu
http://gid.cimne.upc.es/mailman/listinfo/gidlist

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


Please be advised that this email may contain confidential
information. If you are not the intended recipient, please notify us
by email by replying to the sender and delete this message. The
sender disclaims that the content of this email constitutes an offer
to enter into, or the acceptance of, any agreement; provided that the
foregoing does not invalidate the binding effect of any digital or
other electronic reproduction of a manual signature that is included
in any attachment.
User avatar
abelcs
Posts: 146
Joined: Mon Oct 13, 2014 9:14 am

[GiDlist] Mixed meshes

Post by abelcs »

Dear Mark,

Not in a short term. By the moment we are not planing to include any
unstructured hexa mesher inside GiD.

Kind regards,

ABEL


_________________________________
Abel Coll Sans - Civil Engineer
CIMNE - International Center for Numerical Methods in Engineering
Ofice c-2, C1 building - Campus Nord UPC
Gran Capità s/n, 08034 Barcelona
T: 34 - 93 401 74 03 Fax: 34 - 93 40 65 17
________________________________



AVISO IMPORTANTE

Los datos de carácter personal contenidos en el mensaje, se registrarán en
un fichero para facilitar la gestión de las comunicaciones de CIMNE. Se
pueden ejercitar los derechos de acceso, rectificación, cancelación y
oposición por escrito, dirigiéndose a nuestras oficinas de CIMNE, Gran
Capitán s/n, Edificio C1 - Campus Norte UPC, 08034 Barcelona, España.

AVÍS IMPORTANT

Les dades de caràcter personal contingudes en aquest missatge es registraran
en un fitxer per facilitar la gestió de les comunicacions del CIMNE. Es
poden exercir els drets d'accés, rectificació, cancel·lació i oposició, per
escrit a les nostres oficines del CIMNE, Gran Capità s/n, Edifici C1, Campus
Nord UPC, 08034 Barcelona, Espanya.

IMPORTANT NOTICE

All personal data contained in this mail will be processed confidentially
and stored in a file property of CIMNE in order to manage corporate
communications. You may exercise the right of access, rectification,
deletion and objection by letter sent to CIMNE, Gran Capitán, Edificio C1 -
Campus Norte UPC, 08034 Barcelona, Spain.

________________________________




-----Mensaje original-----
De: gidlist-admin at gid.cimne.upc.edu [mailto:gidlist-admin at gid.cimne.upc.edu]
En nombre de Smith, Mark
Enviado el: miércoles, 14 de julio de 2010 18:01
Para: gidlist at gid.cimne.upc.edu
Asunto: RE: [GiDlist] Mixed meshes

Hi Abel
Thanks for your reply. I agree I can split the volumes into 6 faced regions
but this is time consuming as it has to be done manually and any change to
the geometry means this has to be repeated all over again ;-( I have used
the semi structured approach before but this also requires lots of manual
intervention.
Are there any plans to introduce a fully automatic hexahedral mesher?

Regards
mark

-----Original Message-----
From: gidlist-admin at gid.cimne.upc.edu
[mailto:gidlist-admin at gid.cimne.upc.edu] On Behalf Of Abel Coll
Sent: 14 July 2010 16:42
To: gidlist at gid.cimne.upc.edu
Subject: RE: [GiDlist] Mixed meshes

Dear Mark,

If the model is like the one you sent (without any "more complex" part), you
also can try to subdivide the cap region so as it will be formed by 6-faced
volumes. Doing so, you will be able to generate structured hexahedras.

Note that you also have the semi-structured option for generating
hexahedras. This option can be applied to topologically prismatic volumes,
and can generate hexas (structured in the prismatic direction of the volume)
"connecting" the mesh of the tops of the volume, which can be unstructured
(quads in this case).

Kind regars,

ABEL


_________________________________
Abel Coll Sans - Civil Engineer
CIMNE - International Center for Numerical Methods in Engineering Ofice c-2,
C1 building - Campus Nord UPC Gran Capità s/n, 08034 Barcelona
T: 34 - 93 401 74 03 Fax: 34 - 93 40 65 17 ________________________________



AVISO IMPORTANTE

Los datos de carácter personal contenidos en el mensaje, se registrarán en
un fichero para facilitar la gestión de las comunicaciones de CIMNE. Se
pueden ejercitar los derechos de acceso, rectificación, cancelación y
oposición por escrito, dirigiéndose a nuestras oficinas de CIMNE, Gran
Capitán s/n, Edificio C1 - Campus Norte UPC, 08034 Barcelona, España.

AVÍS IMPORTANT

Les dades de caràcter personal contingudes en aquest missatge es registraran
en un fitxer per facilitar la gestió de les comunicacions del CIMNE. Es
poden exercir els drets d'accés, rectificació, cancel·lació i oposició, per
escrit a les nostres oficines del CIMNE, Gran Capità s/n, Edifici C1, Campus
Nord UPC, 08034 Barcelona, Espanya.

IMPORTANT NOTICE

All personal data contained in this mail will be processed confidentially
and stored in a file property of CIMNE in order to manage corporate
communications. You may exercise the right of access, rectification,
deletion and objection by letter sent to CIMNE, Gran Capitán, Edificio C1 -
Campus Norte UPC, 08034 Barcelona, Spain.

________________________________




-----Mensaje original-----
De: gidlist-admin at gid.cimne.upc.edu [mailto:gidlist-admin at gid.cimne.upc.edu]
En nombre de Smith, Mark
Enviado el: miércoles, 14 de julio de 2010 16:18
Para: gidlist at gid.cimne.upc.edu
Asunto: RE: [GiDlist] Mixed meshes

Hi Enrique
Thanks for the reply. The tetrahedral structured mesh might do the job I
will have to try. I wanted hexahedra ideally as they are not as stiff a
shape, also I imagine their shape quality will not be as good, I did not
realise you could do structured tet meshes, thanks for the prompt reply.
Regards
mark



Subject: [GiDlist] Mixed meshes



From: Enrique Escolano gidlist at gid.cimne.upc.edu
Wed Jul 14 15:48:02 2010


Is possible to do it, but the elements must be compatible: e.g. the
structured part instead of generate hexahedra must be set to generate
tetrahedra (because triangular faces are shared with the unstructured part
of tetrahedra)

To set the dome to be meshed as structured its volumes must have exactly
6
faces: I rebuilt again this part by revolution, to have this 6-faced
volumes.

I attach my model including the mesh (I set a number of 5 structured
divisions for all directions)

Regards

Enrique

----- Original Message -----
From: "Smith, Mark" Mark.Smith at linx.co.uk
To: gidlist at gid.cimne.upc.edu
Sent: Wednesday, July 14, 2010 2:14 PM
Subject: [GiDlist] Mixed meshes


Gid ver 9.0.4

Hi Gid team
Is it possible to produce different mesh types in different regions? In the
attached simple test model I want to be able to produce a structured mesh in
the "dome" region and a tetrahedral mesh in the "cap" region, both meshes
can and will share the same nodes at the interface between the 2 bodies so I
think it should be possible but can't figure out a way
to do it ;-( Any Ideas?
Regards
mark


Please be advised that this email may contain confidential information. If
you are not the intended recipient, please notify us by email by replying to
the sender and delete this message. The sender disclaims that the content
of this email constitutes an offer to enter into, or the acceptance of, any
agreement; provided that the foregoing does not invalidate the binding
effect of any digital or other electronic reproduction of a manual signature
that is included in any attachment.
_______________________________________________
GiDlist mailing list
GiDlist at gid.cimne.upc.edu
http://gid.cimne.upc.es/mailman/listinfo/gidlist

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


Please be advised that this email may contain confidential information. If
you are not the intended recipient, please notify us by email by replying to
the sender and delete this message. The sender disclaims that the content
of this email constitutes an offer to enter into, or the acceptance of, any
agreement; provided that the foregoing does not invalidate the binding
effect of any digital or other electronic reproduction of a manual signature
that is included in any attachment.
_______________________________________________
GiDlist mailing list
GiDlist at gid.cimne.upc.edu
http://gid.cimne.upc.es/mailman/listinfo/gidlist
User avatar
escolano
Posts: 1918
Joined: Sun Sep 05, 1982 10:51 pm

[GiDlist] Mixed meshes

Post by escolano »

If do you had only the dome structured part, you could create hexahedra
(this is the default element for structured volumes),
but this part is sharing surfaces with unstructured volumesn and a
quadrilateral face is not compatible with the triangular face of neighbor
elements
(we don't have special elements like pyramids to do a transition between
hexahedra and tetrahedra)

Regards

Enrique

----- Original Message -----
From: "Smith, Mark" Mark.Smith at linx.co.uk
To: gidlist at gid.cimne.upc.edu
Sent: Wednesday, July 14, 2010 4:17 PM
Subject: RE: [GiDlist] Mixed meshes


Hi Enrique
Thanks for the reply. The tetrahedral structured mesh might do the job I
will have to try. I wanted hexahedra ideally as they are not as stiff a
shape, also I imagine their shape quality will not be as good, I did not
realise you could do structured tet meshes, thanks for the prompt reply.
Regards
mark



Subject: [GiDlist] Mixed meshes



From: Enrique Escolano gidlist at gid.cimne.upc.edu
Wed Jul 14 15:48:02 2010


Is possible to do it, but the elements must be compatible: e.g. the
structured part instead of generate hexahedra must be set to generate
tetrahedra (because triangular faces are shared with the unstructured
part of tetrahedra)

To set the dome to be meshed as structured its volumes must have exactly
6
faces: I rebuilt again this part by revolution, to have this 6-faced
volumes.

I attach my model including the mesh (I set a number of 5 structured
divisions for all directions)

Regards

Enrique

----- Original Message -----
From: "Smith, Mark" Mark.Smith at linx.co.uk
To: gidlist at gid.cimne.upc.edu
Sent: Wednesday, July 14, 2010 2:14 PM
Subject: [GiDlist] Mixed meshes


Gid ver 9.0.4

Hi Gid team
Is it possible to produce different mesh types in different regions? In
the attached simple test model I want to be able to produce a structured
mesh in the "dome" region and a tetrahedral mesh in the "cap" region,
both meshes can and will share the same nodes at the interface between
the 2 bodies so I think it should be possible but can't figure out a way
to do it ;-( Any Ideas?
Regards
mark


Please be advised that this email may contain confidential
information. If you are not the intended recipient, please notify us
by email by replying to the sender and delete this message. The
sender disclaims that the content of this email constitutes an offer
to enter into, or the acceptance of, any agreement; provided that the
foregoing does not invalidate the binding effect of any digital or
other electronic reproduction of a manual signature that is included
in any attachment.
_______________________________________________
GiDlist mailing list
GiDlist at gid.cimne.upc.edu
http://gid.cimne.upc.es/mailman/listinfo/gidlist
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