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

Bad Cd results applying k-ε models to hydrofoil

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   December 9, 2011, 06:17
Default Bad Cd results applying k-ε models to hydrofoil
  #1
spk
Member
 
Join Date: Aug 2009
Posts: 67
Rep Power: 16
spk is on a distinguished road
Hi guys,

I simulated a 2D hydrofoil geometry in non-cavitating conditions.
The tested angles are from 0 to 10 degrees and the velocity is constant.
I simulated this hydrofoil using Spalart-Allmaras, k-ε models and k-ω models. Using S-A and k-ω models i have good results for Cl and Cd comparing with experimental results.
But using the k-ε models (standard,rng,realizable) i have good results for Cl but bad results for Cd (as the angle attack increases Cd decreases!)
Also i used enhanced wall treatment (y+=1).

k-ε models cant solve correctly the drag coefficient in hydrofoils?
Please could you help me?

spk
spk is offline   Reply With Quote

Old   December 10, 2011, 09:27
Default
  #2
spk
Member
 
Join Date: Aug 2009
Posts: 67
Rep Power: 16
spk is on a distinguished road
The problem is solved!
spk is offline   Reply With Quote

Reply

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
bad results when compared with other simulations Le Stanc CFX 12 November 8, 2006 02:47
Bad results when compared with Wind Tunnel Luiz CFX 7 October 27, 2006 10:35
applying results as b.c on some other model manohar FLUENT 3 October 10, 2005 08:03
Comparing Results between Models Mark CFX 2 July 26, 2004 19:29
comparing different models and grids Philipp Main CFD Forum 4 August 31, 2001 05:14


All times are GMT -4. The time now is 02:12.