# Parabolic velocity profile in a rectangular channel

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

 October 26, 2013, 10:12 Parabolic velocity profile in a rectangular channel #1 New Member   Nithish Join Date: Sep 2013 Location: Erlangen,Germany Posts: 20 Rep Power: 6 We are trying to obtain a parabolic velocity profile in a rectangular channel subjected to laminar flow,but we are unable to obtain the desired velocity variation instead we are getting a maximum value through out the y axis except the edges instead of obtaining the maximum value at the centre with the variations along the axis.Attached are the files for velocity and pressure.we request help regarding the check for the boundary conditions and clarifications on them.And also please check the velocity plotted along the y axis. 0.zip

 October 27, 2013, 17:31 Test or BC #2 New Member   Join Date: Jun 2011 Posts: 18 Rep Power: 8 nithishgupta, Are you seeking the duct solution as an Open FOAM test or to serve as an inlet BC in a different problem? If it's the latter, note there's a closed-form solution (though it's an infinite series solution) for fully-developed laminar flow. I don't have it with me, but can provide it in a day or two. Timbojones

 October 28, 2013, 17:35 #3 New Member   Nithish Join Date: Sep 2013 Location: Erlangen,Germany Posts: 20 Rep Power: 6 That would be really helpful for me if you could post it.

 October 30, 2013, 06:39 Analytical solution for rectangular ducts...and more... #4 New Member   Join Date: Jun 2011 Posts: 18 Rep Power: 8 nithishgupta, I was unhappy to learn that some of the CD-ROMs I had burned prior to leaving graduate school are no longer readable. My loss is not necessarily yours, though. I was able to find the closed-form solution posted on the internet at the following link. http://www.engineering.uiowa.edu/~me...t1-updated.pdf Expressions for velocity profile and flow rate in rectangular ducts can be found on page 13, eqns (3-48) and (3-49), respectively. You can use (3-49) in conjunction with your desired flow rate to determine the required pressure gradient to use in (3-48) and compute the velocity profile. I hope this helps. Regards, Timbojones Hackerbrucke likes this.

 Thread Tools Display Modes Linear Mode

 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 OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post QBeast Fluent UDF and Scheme Programming 8 October 15, 2013 05:10 siw FLUENT 4 April 10, 2013 11:19 vetnav Tecplot 4 July 14, 2010 20:03 Rashad FLUENT 2 February 29, 2008 03:36 Nelson FLUENT 0 July 7, 2005 02:49

All times are GMT -4. The time now is 22:02.