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

[ICEM] Meshing A Complex Terrain with ICEM

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   November 23, 2014, 14:28
Default Meshing A Complex Terrain with ICEM
  #1
Senior Member
 
david
Join Date: Oct 2012
Posts: 142
Rep Power: 14
davidwilcox is on a distinguished road
Hi CFD enthusiasts, experts and beginners,
This problem has been causing me to lose sleep for the past 2 weeks and I hope you guys can help me solve it. By the way, a glorious Sunday to all of you!

Project:
I am working on the wind flow over a complex terrain. I have the X Y Z coordinates.

Methodology so far:
-I imported the X Y Z coordinates into Matlab, created a triangular irregular network using the delaunay function and exported the surface as an STL file.
surfmat.png

-I then imported it to AutoCAD to do some trimming of parts I did not want, etc. This is what it looks like.
autocadsurf.jpg

- I then imported part of the geometry into ICEM and it gave me the following distressing view.
surficem001.jpg

As you can see, there are holes everywhere. Building topology will not help at all.

- I then imported the STL file into ICEM and built topology but again nothing worked as it resulted in lots of holes on the surface.

Can anybody offer any help/advice?

Thanks
David
davidwilcox is offline   Reply With Quote

Old   November 24, 2014, 20:58
Default
  #2
Senior Member
 
david
Join Date: Oct 2012
Posts: 142
Rep Power: 14
davidwilcox is on a distinguished road
Anybody out there?
davidwilcox is offline   Reply With Quote

Old   December 1, 2014, 08:52
Default
  #3
Member
 
Miro
Join Date: Jan 2013
Location: Europe
Posts: 51
Rep Power: 13
miro2000 is on a distinguished road
You could try Netgen: it's capable of creating a healthy surface mesh/checking if the one you have is healthy.

Also, Autocad can export in other formats that gambit can handle, so maybe you should try those (like ACIS, but there may be a better option).

- miro

edit: ups, now I see you were asking for ICEM, not Gambit, but I it should be the same.

Last edited by miro2000; December 1, 2014 at 08:57. Reason: a word
miro2000 is offline   Reply With Quote

Old   December 2, 2014, 11:46
Default
  #4
Super Moderator
 
diamondx's Avatar
 
Ghazlani M. Ali
Join Date: May 2011
Location: Tokyo, Japan
Posts: 1,385
Blog Entries: 23
Rep Power: 29
diamondx will become famous soon enough
I know it may sound stupid again, did you right-click on surfaces, and check FULL. holes may appears if the surfaces are shown as simpler...
__________________
Regards,
New to ICEM CFD, try this document --> https://goo.gl/KAOIwm
Ali
diamondx is offline   Reply With Quote

Old   December 4, 2014, 05:22
Default
  #5
New Member
 
Join Date: Feb 2014
Posts: 11
Rep Power: 12
CFDbeginner88 is on a distinguished road
Reducing the triangulation tolerance at Settings -> Model/Units might also make the graphics look better. Just add a zero after the dot to the number used.
CFDbeginner88 is offline   Reply With Quote

Old   December 9, 2014, 09:46
Default
  #6
Member
 
Alexander
Join Date: Nov 2009
Location: Blansko, Czech Republic
Posts: 30
Rep Power: 17
Pospelov is on a distinguished road
Hello. If you still need to create the surface from point I can try to help you. Could you sent the point for me. And I need to know the error of this point. )
Pospelov 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
[SOWFA] how to use terrainBlockMesher for meshing a complex terrain? Muhammad Omer Mughal OpenFOAM Community Contributions 11 June 6, 2016 01:39
[ICEM] ICEM Blocking and Meshing - Flow over Periodic Hill Crank-Shaft ANSYS Meshing & Geometry 8 April 29, 2014 04:11
[ANSYS Meshing] Hybrid meshing ICEM djoul ANSYS Meshing & Geometry 2 January 17, 2012 19:18
ICEM meshing question gsbhatia89 ANSYS Meshing & Geometry 0 June 10, 2010 09:29
[ICEM] Need help in ICEM CFD Mapped Meshing falconf16 ANSYS Meshing & Geometry 3 February 19, 2010 15:21


All times are GMT -4. The time now is 16:37.