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

boundary layer thickness

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

Reply
 
LinkBack Thread Tools Display Modes
Old   December 29, 2000, 06:40
Default boundary layer thickness
  #1
98.4F
Guest
 
Posts: n/a
Hey,

When doing the boundary layer correction first the normal boundary layer thickness is calculated and from that the boundary layer displacement thickness is calculated. What's the difference between " normal boundary layer thickness" and "boundary layer displacement thickness " ? They sound similar to me.

Thanks
  Reply With Quote

Old   December 29, 2000, 08:23
Default Re: boundary layer thickness
  #2
Ghanshyam Singh
Guest
 
Posts: n/a
#B.L. Thickness(delta) is the normal distance where velocity changes from zero to 0.99Uo.

#Displacement thickness(delta_star) is based on the mass flux balance and it can be defined as the distance by which the external streamlines are shifted because of the b.l. formation. It is equal to the distance (delta_star) such that deficit in discharge due to b.l. formation is equal to delta_star times the ambient velocity "Uo".

GS
  Reply With Quote

Reply

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
Boundary layer thickness ghazanfarzahedi Main CFD Forum 2 July 28, 2009 23:43
Boundary layer thickness calculation nat FLUENT 0 April 9, 2009 06:04
plotting boundary layer thickness graphs in a 3d Neelima FLUENT 1 March 29, 2006 18:04
Boundary Layer Thickness cfd-freak Main CFD Forum 3 March 27, 2003 13:18
boundary layer thickness Lee,jangho FLUENT 4 September 25, 2000 00:09


All times are GMT -4. The time now is 12:25.