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

Quick help on the Hoyas and Jimenez Channel (Re_tau = 2000)!

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

Reply
 
LinkBack Thread Tools Display Modes
Old   April 11, 2013, 15:18
Default Quick help on the Hoyas and Jimenez Channel (Re_tau = 2000)!
  #1
Member
 
Jack
Join Date: Aug 2012
Posts: 42
Rep Power: 4
JackW is on a distinguished road
Hi Guys,

I have to ask this any help would be great! I am looking to calculate the invariant map III-II for a RANS against the DNS data here:

http://torroja.dmt.upm.es/channels/d...es/Re2000.prof

however I need the Reynold's stress. Unfortunately I am unsure as to how to calculate this from the available data (the headers have confused me! <- annoyed in myself!)

Best wishes,

Jack
JackW is online now   Reply With Quote

Old   April 12, 2013, 04:19
Default
  #2
Senior Member
 
sbaffini's Avatar
 
Paolo Lampitella
Join Date: Mar 2009
Location: Italy
Posts: 518
Blog Entries: 14
Rep Power: 17
sbaffini will become famous soon enough
The Reynolds stresses in the file are:

u'+, v'+, w'+, uv'+, uw'+ and vw'+.

A simple plot of these quantities will certify this.
sbaffini is offline   Reply With Quote

Old   April 16, 2013, 13:12
Default
  #3
Member
 
Jack
Join Date: Aug 2012
Posts: 42
Rep Power: 4
JackW is on a distinguished road
Hi, just incase anyone else has this question they are the RMS (root mean square) values of u_i u_j, called the turbulence intensities by the authors (but intensity is typically divided by U) - so to get the Reynold's stresses simply square the values

ps. sbaffini - I thought they were Reynold's stresses at first too!
JackW is online now   Reply With Quote

Old   April 18, 2013, 07:19
Default
  #4
Senior Member
 
sbaffini's Avatar
 
Paolo Lampitella
Join Date: Mar 2009
Location: Italy
Posts: 518
Blog Entries: 14
Rep Power: 17
sbaffini will become famous soon enough
That's how you will more probably find them in any DNS database (all the ones i know). I tought you were unsure about the colums to pick up
sbaffini 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



All times are GMT -4. The time now is 17:12.