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

Connectors don't catch database

Register Blogs Community New Posts Updated Threads Search

Like Tree2Likes
  • 1 Post By cnsidero
  • 1 Post By ElVau

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   November 6, 2014, 04:03
Default Connectors don't catch database
  #1
New Member
 
Join Date: Apr 2013
Posts: 3
Rep Power: 13
ElVau is on a distinguished road
I try to mesh a pointed airfoil with a sharp trailing edge with a C-type mesh. I followed a tutorial on youtube but I could not mesh the round part in the front of the airfoil.
When I looked closer, I saw that the Connectors did not catch the database fully at the trailing edge, so I guess, there was a hole in the grid, why I could not connect it.

Can I manually change the endpoint of an connector?

As I have a quasi-3D-database, perhaps a solution could be to first reduce it to 2D and when the mesh is done in 2D to extrude it again?

Any idea or help will be appreciated.
Attached Images
File Type: jpg sharp-trailingedge.jpg (8.9 KB, 34 views)
ElVau is offline   Reply With Quote

Old   November 6, 2014, 08:56
Default
  #2
Senior Member
 
Chris Sideroff
Join Date: Mar 2009
Location: Ottawa, ON, CAN
Posts: 434
Rep Power: 22
cnsidero is on a distinguished road
Without knowing the details of your geometry (and hence why the node ended up there) my first guess would be to manually split the (bottom) connector at the trailing edge point.

- Select the connector, Edit>Split
- Move the cursor to the trailing edge point until it "snaps" to that point. Left-click to split the connector
- Select top 2 connectors, Edit>Join

Let me know the result.

-Chris
cnsidero is offline   Reply With Quote

Old   November 7, 2014, 09:15
Default
  #3
New Member
 
Join Date: Apr 2013
Posts: 3
Rep Power: 13
ElVau is on a distinguished road
Thank you, this basically worked.
But still there are some things that I could not fully solve.

First I split the lower connector in order to catch the trailing edge. Then I have two connectors on the suction side, which I join. But the spacing still is seperated, even though it is one connector (see pictures).
/edit: So both spacings start at the last point before the trailing edge, so I can't controll the amount of points there and the spacing, as for the last part of the suction side, I have one single point..

I guess my problems are pretty basic ones, I just started working with pointwise.
Attached Images
File Type: jpg grading.jpg (10.0 KB, 28 views)
File Type: jpg full-screen.jpg (13.9 KB, 21 views)
ElVau is offline   Reply With Quote

Old   November 7, 2014, 09:44
Default
  #4
Senior Member
 
Chris Sideroff
Join Date: Mar 2009
Location: Ottawa, ON, CAN
Posts: 434
Rep Power: 22
cnsidero is on a distinguished road
Oh, there's one additional step I forgot to mention that will get rid of the mis-matched spacing where you joined the connectors.

- Select the connector on the suction surface, Grid>Distribute
- Go to Break Point tab, at the bottom, click Delete All Break Points
- Go to Spacing tab and set the desired spacing at the trailing edge
- Go to Distribution tab and set the desired distribution function on that connector

The explanation is that when you join connectors, a break point is created in the resulting connector where the connector was joined. A break point is a special grid point in a connector that gives the user additional control of the location and spacing within the connector.

More often than not, when I join connectors, I don't want the resulting breakpoints so I simply remove them and reset the distribution (as I described above).

Let me know if that works.

-Chris
Aeronautics El. K. likes this.
cnsidero is offline   Reply With Quote

Old   November 11, 2014, 04:59
Default
  #5
New Member
 
Join Date: Apr 2013
Posts: 3
Rep Power: 13
ElVau is on a distinguished road
Perfect, works fine! Thanks a lot
cnsidero likes this.
ElVau is offline   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
Using database files in OpenFOAM menonshyam OpenFOAM Programming & Development 3 August 16, 2014 15:28
[Pointwise] Linking connectors arash Pointwise & Gridgen 2 September 23, 2010 11:44
Gridgen - Link Database / Connector Nico Pointwise & Gridgen 1 April 21, 2007 13:59
Can't open the database. Help Please! CFX Begineer CFX 1 October 27, 2002 13:08
can't open database cfx 5.5.1 Olivier Macchion CFX 4 October 7, 2002 09:19


All times are GMT -4. The time now is 08:45.