CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Mesh Generation & Pre-Processing Software > Pointwise & Gridgen

GRIDGEN REDIMENSION

Register Blogs Community New Posts Updated Threads Search

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   December 16, 2008, 00:09
Default GRIDGEN REDIMENSION
  #1
gr
Guest
 
Posts: n/a
I need to redimension the grids on a connector, without changing the starting and ending distance of the first and the last grid point respectively. Here is an example, Connector with first grid point say 0.1 mm and the remaining grids are equidistant say 0.3 mm apart and the ending distance say 0.2 mm. Now I wish to get the equal gridpoints 0.9 mm apart i.e every fourth grid point remains, but I want to keep the same constraints at the beginning and end. How can I do this? Thanks

  Reply With Quote

Old   December 16, 2008, 20:31
Default Re: GRIDGEN REDIMENSION
  #2
Chris Sideroff
Guest
 
Posts: n/a
gr,

If you have set, i.e. constrained, the beginning/ending spacing of a connector, changing the number of points on the connector does not change the beginning/ending spacing.

However to get the point distribution you desire, contrained ends with equi-distant intermediate spacing you have to go a step further. You will need to create breakpoints at the first and last grid point locations. Doing this allows one to set a specific distribution on each sub-connector. The first and last sub-connector will only have two grid points so the distribution method will have no influence on these. Simply apply equal spacing to the middle sub-connector and voila!

If you change the total number of points, you will need to revisit the "connector distribution" mode to ensure the first and last sub-connector have only two grid points with the remainder in the middle (you can change the number of sub-connector grid points in this mode as well). You may also need to apply equal spacing to the middle sub-connector as well.

Another way to accomplish the same idea is to create a new at the same location as the old one, set the internal distribution to your liking and use "connector replace" to replace the old with the new.

Hope that helps, Chris
  Reply With Quote

Old   December 17, 2008, 12:13
Default Re: GRIDGEN REDIMENSION
  #3
gr
Guest
 
Posts: n/a
Thanks so much.
  Reply With Quote

Reply


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 Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
How to import NACA 0012 Profile in Gridgen maplepink Main CFD Forum 17 May 7, 2013 13:01
gridgen memory allocation problem ziad Pointwise & Gridgen 5 February 27, 2010 20:16
Glyph command to close GRIDGEN? chris Pointwise & Gridgen 2 March 25, 2007 14:22
Gridgen question vishwas Pointwise & Gridgen 2 February 25, 2006 16:05
CFX & Gridgen user. Please help Jane CFX 1 March 15, 2004 00:17


All times are GMT -4. The time now is 01:36.