Radial velocity with a swirling core in laminar pipe flow

MissCFD · June 25, 2015, 22:55

Hello,

Can everybody explain me where that the radial velocity come from in straight pipe flow with a swirling wall in the core of the pipe ? I suppose that it is in relation to boundaries layers ?!

Although the radial velocity is negligible compared with the others components, I noted that the radial velocity reach a max peak near the rotating wall and an other near the static wall and I just wondered why ?

Thank you

ghorrocks · June 26, 2015, 08:03

Yes, this sounds like a secondary flow. Look up "secondary flow" on google and you should get some good examples of flows you would not expect.

June 25, 2015, 22:55	Radial velocity with a swirling core in laminar pipe flow	#1
MissCFD Senior Member Join Date: Aug 2014 Posts: 160 Rep Power: 12	Hello, Can everybody explain me where that the radial velocity come from in straight pipe flow with a swirling wall in the core of the pipe ? I suppose that it is in relation to boundaries layers ?! Although the radial velocity is negligible compared with the others components, I noted that the radial velocity reach a max peak near the rotating wall and an other near the static wall and I just wondered why ? Thank you

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
solving a conduction problem in FLUENT using UDF	Avin2407	Fluent UDF and Scheme Programming	1	March 13, 2015 03:02
Laminar pipe flow	John	FLUENT	6	December 5, 2014 06:00
Boundary condition of velocity and pressure at interface for air water pipe flow	jignesh_thaker2007	OpenFOAM Running, Solving & CFD	0	June 10, 2014 17:42
Time averaged velocity in turbulent pipe flow	tsero	FLUENT	1	November 2, 2012 04:19
WSS and normal velocity gradient for the slanted pipe	wanna88	FLUENT	2	October 1, 2012 23:34

June 26, 2015, 08:03		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,871 Rep Power: 144	Yes, this sounds like a secondary flow. Look up "secondary flow" on google and you should get some good examples of flows you would not expect.