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

oscillation of the pressure coefficient! why?

Register Blogs Community New Posts Updated Threads Search

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   June 29, 2009, 15:17
Default oscillation of the pressure coefficient! why?
  #1
New Member
 
alex
Join Date: Jun 2009
Posts: 1
Rep Power: 0
nomrodd is on a distinguished road
hi,

after a steady state simulation around a NACA 4415 airfoil i have plotted the cp_polar (the plot is attached) and noticed a oscillation of the pressure coefficient cp!
the used turbulence model was SST!

what may be the reasons for that oscillation?

Thanks!
Attached Images
File Type: jpg cP_NACA_4415.jpg (86.9 KB, 83 views)
nomrodd is offline   Reply With Quote

Old   June 29, 2009, 19:34
Default
  #2
Super Moderator
 
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,871
Rep Power: 144
ghorrocks is just really niceghorrocks is just really niceghorrocks is just really niceghorrocks is just really nice
Hi,

My first guess is facetting of the geometry. You need a smoother shape. Second guess is incomplete convergence.

Glenn Horrocks
ghorrocks is offline   Reply With Quote

Reply


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
Pressure coefficient Giuseppe FLUENT 2 July 26, 2015 04:19
pressure coefficient problem (FLUENT) pimpin FLUENT 8 March 24, 2014 23:37
How to apply negtive pressure to outlet bioman66 CFX 5 June 3, 2006 02:40
pressure gradient term in low speed flow Atit Koonsrisuk Main CFD Forum 2 January 10, 2002 11:52
Problem in Result of the pressure coefficient Ken Choi Main CFD Forum 2 March 15, 1999 05:15


All times are GMT -4. The time now is 16:06.