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

mesh like spiderweb?

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

Reply
 
LinkBack Thread Tools Display Modes
Old   December 17, 2009, 05:39
Default
  #21
Senior Member
 
Join Date: Dec 2009
Posts: 112
Rep Power: 8
heavy_user is on a distinguished road
HI all,

thx for the answer!

I want to mesh outside and inside (it is supposed to be a circle inlet at the bottom of a box).

In the last try I ended up having Nx =Ny, otherwise blockmesh complained that the meshing would not match on different edges.
So I came up with the mixed edges theorie (neither parallel to x- or y- axes).
maybe it was a different prob.

I will check on that.

regards
heavy_user is offline   Reply With Quote

Old   December 17, 2009, 06:31
Default
  #22
Senior Member
 
Join Date: Dec 2009
Posts: 112
Rep Power: 8
heavy_user is on a distinguished road
I checked it out again and it seems to be a matter of connecting the meshes of different volumes rather than meshing the single volumes...
I am having a little trouble to imagine it (without a GUI) and to relate the curved edges of a cylinder to the cartesian-coordinate systems...
(so it turned out that the x-direction of the inner half of a cylinder seems to be parallel to the y-direction of the fraction of a cylinder surrounding the inner one, thats why I ended up not being able to mesh x- and y- direction independently)


So I got to apologize for confusing you about the "problem" ...!!
THX for your effort again!!!
heavy_user is offline   Reply With Quote

Old   December 18, 2009, 08:30
Default
  #23
Senior Member
 
Join Date: Mar 2009
Posts: 248
Rep Power: 10
jaswi is on a distinguished road
Hi Heavy_user

As far as I can understand you , you need to take a look at the User Guide's
example of hole in a plate mesh. The blockMeshDict given for this case is for a quarter mesh. Take a look at it and let us know if that solves your problem.
Else please post here a rough hand sketch of the mesh topology you desire.
The spider type mesh you initially wanted is also possible with blockmeshdict. One just needs to collapse one of the edges of block and it does works. Please first provide a rough mesh topology you desire.

Thanks

Best Regards
jaswi
jaswi is offline   Reply With Quote

Old   December 18, 2009, 08:44
Default
  #24
Senior Member
 
Join Date: Dec 2009
Posts: 112
Rep Power: 8
heavy_user is on a distinguished road
Quote:
Originally Posted by jaswi View Post
Hi Heavy_user

As far as I can understand you , you need to take a look at the User Guide's
example of hole in a plate mesh. The blockMeshDict given for this case is for a quarter mesh. Take a look at it and let us know if that solves your problem.
Else please post here a rough hand sketch of the mesh topology you desire.
The spider type mesh you initially wanted is also possible with blockmeshdict. One just needs to collapse one of the edges of block and it does works. Please first provide a rough mesh topology you desire.

Thanks

Best Regards
jaswi

hi Jaswi,

thx for the answer!!

I am working in 2D right now, so i avoided the prob.

I was told before that it was NOT possible to create a mesh I originally desired (spidermesh) with blockmesh, so I delayed the task... so thanks for the information with the collapsing corners.. I cant imagine right now how this makes the mesh I desired possible, but I will do more thinking and get back to you if I need further help...



regards
heavy_user is offline   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
Meshing aifoil in ICEM student123a ANSYS Meshing & Geometry 13 December 8, 2010 11:40
Dynamic Mesh Problem. Tom Clark FLUENT 9 July 7, 2010 07:56
problem when converting mesh (made by ICEM) using fluentMeshToFoam Forrest_Lei OpenFOAM 11 October 16, 2009 06:28
2d irregular grid Remy Main CFD Forum 1 December 22, 2008 05:49
General questions on grid-based computing Adrin Gharakhani Main CFD Forum 21 June 5, 2000 13:47


All times are GMT -4. The time now is 22:51.