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

Euler computation on hybrid grid

Register Blogs Community New Posts Updated Threads Search

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   October 7, 2011, 06:51
Default Euler computation on hybrid grid
  #1
Senior Member
 
Join Date: Oct 2011
Posts: 242
Rep Power: 17
naffrancois is on a distinguished road
Hello,

For some strange reasons, I would like to perform an Euler computation of a NACA0012, M=0.8, a=1.25 on a hybrid grid.

Obvisouly, I encounter convergence problems , stall or crash.

Does any of you have some tips in order to enforce convergence ?

What I have:
- Time-stepping: Euler-Backward, RGK family
- Spatial scheme: central scalar, central matrix, and some upwind schemes
- Multigrid, Full-multigrid, single grid start-up
- Residual smoothing
- ...

What I tried so far:
- deactivate multigrid
- increase scalar dissipation coeffs
- lowering CFL up to 1 for Euler Backward time-stepping

Not working so far... any help would be highly appreciated !

François
naffrancois is offline   Reply With Quote

Reply

Tags
hybrid grid euler crash


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
Grid generation and Compressible Euler equations oe Main CFD Forum 7 September 8, 2008 22:28
Hybrid mesh generation Jake Main CFD Forum 2 April 21, 2007 15:27
GRID TO GRID INTERPOLATION in FLUENT calogero FLUENT 3 June 4, 2003 09:32
Combustion Convergence problems Art Stretton Phoenics 5 April 2, 2002 06:59
Troubles modelling flow through a grid Hans Klaufus CFX 1 June 28, 2000 17:43


All times are GMT -4. The time now is 03:09.