[ GiDlist ] Urgent: Connectivity for 20 noded brick element
Posted: Fri May 04, 2001 2:39 pm
Hello,
In an hexa element is not easy of talking about clockwise sense
because this is a convention only valid for a plane. In 3D, it is
better of talking about the right hand rule. For this element, the
criteria is:
The normal of the face 1-2-3-4, using the right hand rule, will point
towards the interior of the element. The normal of the face 5-6-7-8 will
point towards outside the element.
Also, check the following:
Command: *ElemsConec can have as argument: swap
Command: *GlobalNodes can have as arguments: invert swap swapinvert
Also, All these commands can have an additional argument that is the
number
of order of the node.
For example, to print the 3th node of one element use:
*ElemsConec(3)
Regards,
-----Mensaje original-----
De: owner-gid at gatxan.cimne.upc.es
[mailto:owner-gid at gatxan.cimne.upc.es]En nombre de Gunaratnam
Gnanaranjan
Enviado el: viernes, 04 de mayo de 2001 0:22
Para: gidlist at gatxan.cimne.upc.es
Asunto: [ GiDlist ] Urgent: Connectivity for 20 noded brick element
Hi All
I need some clarification about the local node
numbering for 20 noded brick element connectivity.
As I see, the gid first list the conner nodes and
then the intermediate nodes of each side.Thats fine.
But the problem is it lists the nodes in the clockwise
sense whereas I want it in the anti clockwise sense.
(This change in direction of connectivity gives me
large errors)Is there any way I can ask the GID to
list the connectivity in anti clock wise sense.
(ie:starting from a node and proceding in the
anticlockwise direction
Iwould appreciate if some one can give me some insight
in to this problem.
gnana
USA
__________________________________________________
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In an hexa element is not easy of talking about clockwise sense
because this is a convention only valid for a plane. In 3D, it is
better of talking about the right hand rule. For this element, the
criteria is:
The normal of the face 1-2-3-4, using the right hand rule, will point
towards the interior of the element. The normal of the face 5-6-7-8 will
point towards outside the element.
Also, check the following:
Command: *ElemsConec can have as argument: swap
Command: *GlobalNodes can have as arguments: invert swap swapinvert
Also, All these commands can have an additional argument that is the
number
of order of the node.
For example, to print the 3th node of one element use:
*ElemsConec(3)
Regards,
-----Mensaje original-----
De: owner-gid at gatxan.cimne.upc.es
[mailto:owner-gid at gatxan.cimne.upc.es]En nombre de Gunaratnam
Gnanaranjan
Enviado el: viernes, 04 de mayo de 2001 0:22
Para: gidlist at gatxan.cimne.upc.es
Asunto: [ GiDlist ] Urgent: Connectivity for 20 noded brick element
Hi All
I need some clarification about the local node
numbering for 20 noded brick element connectivity.
As I see, the gid first list the conner nodes and
then the intermediate nodes of each side.Thats fine.
But the problem is it lists the nodes in the clockwise
sense whereas I want it in the anti clockwise sense.
(This change in direction of connectivity gives me
large errors)Is there any way I can ask the GID to
list the connectivity in anti clock wise sense.
(ie:starting from a node and proceding in the
anticlockwise direction
Iwould appreciate if some one can give me some insight
in to this problem.
gnana
USA
__________________________________________________
Do You Yahoo!?
Yahoo! Auctions - buy the things you want at great prices
http://auctions.yahoo.com/