CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS > FLUENT

Inviscid solver : separation of the flow

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

LinkBack Thread Tools Search this Thread Display Modes
Old   September 1, 2003, 11:18
Default Inviscid solver : separation of the flow
Jean-Marie Cavet
Posts: n/a
Dear all

I would need a piece of advice about how Fluent deals with the inviscid solver. Indeed,I am working on a 3D body and the lift coefficient I got for different angles of attack gives a stall point. Besides, concerning the flow visualisation, I got some kind of separation of the flow. Should this solver not understand flow separation (since no boundary layer)...? Why does this solver model the stalling point? Could you answer me, should you have any ideas about it??

Thanks all

  Reply With Quote

Old   September 2, 2003, 12:32
Default Re: Inviscid solver : separation of the flow
Jonas Larsson
Posts: n/a
What you are seeing is separation caused by the artificial disspiation/viscosity in Fluent's Euler scheme. The separation point (assuming that it is on a curved surface and not at a corner) does not represent anything physical, it is a numerical effect. An "ideal" Euler solver should not predict any separation at all from a wing at high angle of attack (past the stall line).

Separation in Euler solvers has been discussed in detail several time before here. Here are a few archived discussions that might be of interest:
  Reply With Quote


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
compressible flow calculation error using rhoSimpleFoam solver student4326 OpenFOAM Running, Solving & CFD 7 November 2, 2015 11:34
ATTENTION! Reliability problems in CFX 5.7 Joseph CFX 14 April 20, 2010 15:45
What solver to use for simulating flow behavior in inlet manifold mecbe2002 OpenFOAM 4 April 9, 2010 08:01
Poor Convergence for Transient Subsonic Diffuser sims with flow separation TWaung CFX 1 April 16, 2009 08:25
Fatal over flow in solver Nandu CFX 5 September 16, 2002 07:19

All times are GMT -4. The time now is 10:46.