CFD Online Logo CFD Online URL
Home > Forums > General Forums > Main CFD Forum

determination of fully developed flow

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

LinkBack Thread Tools Search this Thread Display Modes
Old   September 3, 2002, 22:00
Default determination of fully developed flow
Posts: n/a
hi there,

i am interested in finding the entry length for several Reynolds numbers for flow in a straight rectangular duct. the criteria i used to determine the entry length was that the second derivative of the pressure with respect to the streamwise direction be less than certain predefined value of epsilon, (d^2P/dz^2 < epsilon). it was found that different values of epsilon give different entry length (note that the difference is significant).


what is the appropriate magnitude of epsilon? 1e-4? 1e-5?

other that the above mentioned criteria, what other criteria can i use?

thanks in advance.

regards, yfyap
  Reply With Quote


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
Fully Developed Flow in Star-cd SMM STAR-CD 0 September 5, 2011 23:08
Fully Developed Flow at an Inlet Ed Mueller CFX 5 January 13, 2009 12:50
what is the fully developed fluid flow? charles CFX 7 November 13, 2006 10:48
udf for 3D laminar fully developed flow salman FLUENT 0 November 9, 2006 22:45
B. C. for Fully Developed flow?? M Kermani Main CFD Forum 10 November 9, 2000 20:31

All times are GMT -4. The time now is 09:22.