CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > OpenFOAM > OpenFOAM Meshing & Mesh Conversion

[blockMesh] Question possible stupid about grid

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   April 5, 2007, 08:28
Default Question possible stupid about grid
  #1
Member
 
Fabian Peng Karrholm
Join Date: Mar 2009
Posts: 61
Rep Power: 15
fabianpk is on a distinguished road
Hello,

I'd like to create a mesh with rounded off corners. I'm not sure what I've created will work, because it ends up with internal faces.

This is the grid:

http://www.tfd.chalmers.se/~f98faka/roundCorners.jpg

and this is the grid with the internal faces:
http://www.tfd.chalmers.se/~f98faka/...SeeThrough.jpg

So you see I've made the corners as wedges, resulting in a zero-area face. Doesn't sound very good, but is there some workaround to this? If not I'll have to think of some other type of mesh setup.


/Fabian
fabianpk is offline   Reply With Quote

Old   April 6, 2007, 03:50
Default Does the collapseEdges utility
  #2
Senior Member
 
Mattijs Janssens
Join Date: Mar 2009
Posts: 1,419
Rep Power: 24
mattijs is on a distinguished road
Does the collapseEdges utility do something for you?
mattijs is offline   Reply With Quote

Old   April 10, 2007, 05:55
Default No, it either doesn't do anyth
  #3
Member
 
Fabian Peng Karrholm
Join Date: Mar 2009
Posts: 61
Rep Power: 15
fabianpk is on a distinguished road
No, it either doesn't do anything, or just tries to remove so many edges some cells would get less than 4 faces. It does however, report cells having 5 faces (which is exactly what I want for the cake-sized cells on the edges).

What I've done that works (at least seemingly) is to define the zero-sized faces as empty, and then removed them from the constant/polyMesh/boundary folder. It seems from early testing at least, that this does the job. It's a rather ugly solution though. If I do not remove the lines in boundary-file, I get the same result, only ensight displays the empty boundary a little oddly.

Can I define the cakepiece-blocks as something else than hex to make Foam understand it's supposed to join one edge together, or does it understand that already? It seems to do so, at least from the short simulations I've ran.
fabianpk is offline   Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
On grid independent solution for pulsatile flow David FLUENT 5 March 25, 2022 03:33
Generating elliptic grid around NACA SC2-0714 airfoil DA6righthand Main CFD Forum 20 November 3, 2015 07:50
question on technical strategy of loop on unstrcutred grid for flux computatoin dokeun Main CFD Forum 8 March 11, 2013 10:25
Question regarding non-uniform FVM staggered grid quarkz Main CFD Forum 2 June 18, 2011 17:18
Moving Body Grid Question Matt Main CFD Forum 5 September 13, 2004 00:45


All times are GMT -4. The time now is 03:19.