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

Chimera method

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

Reply
 
LinkBack Thread Tools Display Modes
Old   October 8, 2004, 13:09
Default Chimera method
  #1
Bill
Guest
 
Posts: n/a
Are collar grids unavoidable for chimera method applied to penetrating bodies,

Thanks,

Bill.
  Reply With Quote

Old   October 8, 2004, 16:03
Default Re: Chimera method
  #2
ag
Guest
 
Posts: n/a
Not if you are clever in how you grid around the protruding body. For example, consider a wing grid where j goes around the body and k moves outboard along the wing (l then is the direction out from the wing). If you make the k = 1 surface conform to the fuselage surface you will not need a separate collar grid. The k = 1 surface becomes part of the solid boundary definition for the fuselage, and represents the part of the fuselage surface removed by the presence of the wing. Of course, sometimes it's easier just to build a collar grid in order to not have orphans.
  Reply With Quote

Old   October 14, 2004, 14:57
Default Re: Chimera method
  #3
Bill
Guest
 
Posts: n/a
I agree, but my point is: collar grids are also quite complex to generate. The strength (on paper) of chimera method is the use of totally independant meshes. But it seems to me that we just displace the problem to the collar grids.
  Reply With Quote

Old   October 14, 2004, 16:17
Default Re: Chimera method
  #4
ag
Guest
 
Posts: n/a
The strength of the Chimera method is that instead of trying to generate one grid for a complex geometry (wing-fuselage-inlet-etc) I can generate simpler grids for each part and have them mate in a fairly general overlapping manner. A collar grid is significantly less complex than what you need if you don't use some type of domain decomposition.
  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
discretizer - gmshToFoam Andyjoe Open Source Meshers: Gmsh, Netgen, CGNS, ... 13 March 14, 2012 05:35
Comparison: Finite Volume Method vs. Analytic Method m-fry Main CFD Forum 1 April 20, 2010 14:40
Code for most powerfull FDV Method D.S.Nasan Main CFD Forum 6 September 4, 2008 02:08
Help about the preconditioner in gmres method Dan Gao Main CFD Forum 3 July 5, 2008 01:18
hess-smith method and fvm method yangqing FLUENT 0 March 20, 2002 20:25


All times are GMT -4. The time now is 15:23.