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

Flat plate transition

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

Reply
 
LinkBack Thread Tools Display Modes
Old   May 13, 2009, 14:30
Default Flat plate transition
  #1
Member
 
Join Date: Mar 2009
Posts: 62
Rep Power: 8
RenardP is on a distinguished road
Hello,

I'm trying to simulate the transition on a flat plate using an extremely fine mesh and a high order DNS.

I wonder what boundary conditions I need to impose in order to obtain transition. Because on a flat plate without a pressure gradient I suppose the only factors that can trigger transition will be the free stream turbulence and the surface roughness. I don't plan to include the surface roughness into this simulation so i suppose if I don't somehow include some fluctuations in the boundary condition I will never be able to catch the transition.

How will be best to include these fluctuations ? I was thinking at adding some random noise (or to use a step function at each time step) to alter the speed in the chordwise direction.

Thanks.
RenardP is offline   Reply With Quote

Old   May 17, 2009, 04:33
Default
  #2
Member
 
Edison
Join Date: Mar 2009
Posts: 40
Rep Power: 8
hadesmajesty is on a distinguished road
I think you may read the papers by Fasel about how to generate disturbance to produce transition.
hadesmajesty is offline   Reply With Quote

Old   May 19, 2009, 09:42
Default
  #3
Member
 
Join Date: Mar 2009
Posts: 62
Rep Power: 8
RenardP is on a distinguished road
This is the article ?

"Spatial direct numerical simulation of transition phenomena in supersonic flat plate boundary layers"

If not, can you please send me the title of Fasel paper.

Thanks.
RenardP is offline   Reply With Quote

Old   May 20, 2009, 10:46
Default
  #4
SKK
Member
 
Join Date: Mar 2009
Posts: 55
Rep Power: 8
SKK is on a distinguished road
The following papers might be of help, although some of them are for bypass transition...

http://www.liv.ac.uk/~em22/papers/GT-2002-30238.pdf

http://www.liv.ac.uk/~em22/papers/96-GT-444.pdf

http://www.liv.ac.uk/~em22/papers/origins_of_spots.pdf
SKK is offline   Reply With Quote

Old   May 20, 2009, 11:47
Default
  #5
Member
 
Join Date: Mar 2009
Posts: 62
Rep Power: 8
RenardP is on a distinguished road
Thanks SSK
RenardP is offline   Reply With Quote

Old   April 8, 2010, 01:07
Default
  #6
New Member
 
Join Date: Mar 2009
Posts: 8
Rep Power: 8
ghazanfarzahedi is on a distinguished road
Dear SSK

Your lins are very useful.

I'm working on transition modeling in flat plate too. I need details of some experimental data. Would you help me how can i found them?

ghazanfar.zahedi@gmail.com

Thanks alot for your favor

Ghazanfar Zahedi
ghazanfarzahedi is offline   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
Flat Plate Transition Test Case Adam CFX 1 June 23, 2005 23:12
Boundary layer transition over a flat plate shraman Main CFD Forum 1 May 12, 2005 04:55
flat plate transition: SST k-omega divergence Peter Gasparovic FLUENT 4 May 3, 2005 13:54
'Fluent for Flat Plate Oscillatory BL Transition Jay FLUENT 11 July 11, 2002 05:48
2D Flat Plate Oscillatory BL Transition Jayd Main CFD Forum 2 June 18, 2002 08:02


All times are GMT -4. The time now is 20:51.