CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > FLUENT

GAMBIT default parameters??

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Display Modes
Old   January 27, 2005, 15:59
Default GAMBIT default parameters??
  #1
JB
Guest
 
Posts: n/a
Hi folks,

Here is my problem : I'd like to know how Gambit does decide the default direction of an edge!!.... I'm (still) working on parametric modelling. Until now I managed doing everything I had to do with the geometry of the model, but now I'm stucked with the meshing part of the job! as an exemple : there's a lot of 'kind of' repetitive patterns in my 3d model, but when I select (using the GUI) a set of edges that have 'kind of' geometrical common points (such as length and orientation) , some of these edges does not have the same orientation! I thought this orientation was ruled by the Id. of the endpoints (for exemple : an edge connecting "vertex.1" to "vertex.2" should be oriented from "v.1" to "v.2", if you see what I mean)

I really need to know how to predict the orientation of an edge, so that I can apply the appropriate meshing to it.

Thank you in advance for your help, I know you guys usually have a bunch of good ideas
  Reply With Quote

Old   January 27, 2005, 17:01
Default Re: GAMBIT default parameters??
  #2
Chris Bailey
Guest
 
Posts: n/a
I always thought the direction of the edge came from the order you specified its vertices, which I think you say above, and when I just tried it, it seems to be true.

The order that matters is the order you name the vertices when you create the edge.

The order you create the vertices does not matter.

At least, that's what I am finding in a few simple tries. You're getting something different? Is there anything special or odd about the way you're doing it???
  Reply With Quote

Old   January 27, 2005, 18:32
Default Re: GAMBIT default parameters??
  #3
JB
Guest
 
Posts: n/a
awww.... I see what you mean Chris. Actually I have no way to control how the edges of my model are created (I don't tink so). here are the main steps of my work: 1.importing a catia model. 2.spliting the volumes of the model in such a way so that I can mesh it easily.

any idea?
  Reply With Quote

Old   January 28, 2005, 09:50
Default Re: GAMBIT default parameters??
  #4
JB
Guest
 
Posts: n/a
Ok dudes: I finally got the trick to get the sense of an edge. The following function returns an array with the coord. of a vector tangent to the edge:

gettangent("edge.xxx",0)

it is then easy to compare the sense of 2 parallel edges by comparing the sign of the coord. of the tangent vectors!

I hope this will help some of you... thx for your help, and see you next time!

jb
  Reply With Quote

Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
How to open a saved Gambit File? barkan FLUENT 5 September 1, 2012 05:53
[ANSYS Meshing] Migrating from GAMBIT to ANSYS Meshing David-CFD ANSYS Meshing & Geometry 1 April 1, 2011 05:22
Creatingfan blade profile in GAMBIT Jenny FLUENT 5 April 28, 2005 05:52
Gambit batch - kill "Startup" box how? Chris Bailey FLUENT 2 February 23, 2005 10:05
Illegal segmentation error in gambit Rob FLUENT 1 February 21, 2005 08:31


All times are GMT -4. The time now is 19:30.