CFD Online Logo CFD Online URL
Home > Forums > Pointwise & Gridgen

Gridgen node spacing

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

LinkBack Thread Tools Display Modes
Old   July 27, 2006, 03:06
Default Gridgen node spacing
Posts: n/a
When I constrain the node spacing on both ends of a connector, the resulting distribution gives a maximum node spacing that is larger than the node spacing specified at both ends. I want to create a connector with a delta s of 2 on one end and 20 on the other end, and the maximum delta s on the connector should not exceed 20. So I need for instance a geometric progression starting with 2 and increasing to 20 on the first part of the connector, and a constant sizing for the rest of the connector. How can I do this without splitting the connector?
  Reply With Quote

Old   July 27, 2006, 07:51
Default Re: Gridgen node spacing
Posts: n/a
You can put a breakpoint on the connector and use that to set spacings internally. Go to the "Redistribute" menu and look at the breakpoint functions.
  Reply With Quote

Old   July 30, 2006, 12:33
Default Re: Gridgen node spacing
John Chawner
Posts: n/a
ag's suggestion about adding a break point at the location where the point spacing reaches 20 and then remains constant is a good one.

If you don't want to have to constrain the location at which the spacing achieves a value of 20 (which you have to do with the break point idea), and if the number of grid points on the connector doesn't have to remain fixed at a specified value, there's a script on the Glyph Script Exchange ( that does pretty much what you want: given the spacing constraints and a maximum spacing allowed anywhere on the connector, it automatically adds points until those criteria are reached.

Also, strictly speaking, geometric progression won't work because it's a 1-sided function - you can only specify the constraint at one end.
  Reply With Quote


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
gambit edge node spacing sayeem FLUENT 2 December 13, 2010 06:12
Controlling spacing in normal extrusion in gridgen praveen Pointwise & Gridgen 0 July 17, 2010 06:01
Node Spacing and number of nodes hagupta CFX 1 June 12, 2006 06:45
Node spacing Gary Holland FLUENT 2 July 1, 2005 11:25
small node spacing Gary Holland FLUENT 13 June 10, 2005 10:06

All times are GMT -4. The time now is 14:49.