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

Laminar bubble separation

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

LinkBack Thread Tools Display Modes
Old   July 24, 2008, 15:56
Default Laminar bubble separation
Posts: n/a
Hi everybody,

I am actually simulating the flow over a 3d wing using the transition model in CFX. My Y+ at the wall are less than 1 except at the near leading edge. I found a laminar separation bubble at 0 angle of attack at about 60% of the chord on the succion side. Could this be possible ??? Furthermore, on the pressure side, the transition occurs earlier as in the succion side. I think that this could be a numerical error. Has someone any idea ?

Thanks ! That would be very helpful !

  Reply With Quote

Old   July 24, 2008, 21:57
Default Re: Laminar bubble separation
Glenn Horrocks
Posts: n/a

Looks like you read my previous posting on laminar separation bubbles.

Possible at 60% chord? Yes.

Transition earlier on pressure side than suction side? Yes. If you have an asymmetric airfoil and you are running it at zero lift then it is likely the pressure side transition will be earlier.

Looks like you need to read some textbooks on airfoil design theory. Time to visit the library.

Glenn Horrocks
  Reply With Quote


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
Separation bubble, hypersonic compression corner ben akih CFX 3 December 10, 2006 17:33
Laminar separation bubble Axilleas Tsompanos FLUENT 5 August 6, 2004 12:24
Laminar boundary separation yongsheng NUMECA 2 March 26, 2003 17:04
V2F model and laminar separation Romuald Main CFD Forum 1 February 17, 2003 05:05
Laminar bubble separation Daniel Bruno FLUENT 0 May 10, 2001 23:11

All times are GMT -4. The time now is 01:22.