# Sudden expansion

 User Name Remember Me Password
 Register Blogs Members List Search Today's Posts Mark Forums Read

 LinkBack Thread Tools Display Modes
 July 28, 2011, 02:28 Sudden expansion #1 Senior Member   Govindaraju Join Date: Apr 2010 Posts: 208 Rep Power: 10 Dear friends I have a question on fluid mechanics. a 6cm dia pipe expands gradually to 9 cm dia pipe. walls of expansion section are angled 10 degree from the horizontal. if the flow exit from smaller to bigger dia pipe there is a flow separation in the downstream flow for certain length and then the flow becomes fully developed . How to calculate exactly the distance from the start of expansion to the fully developed flow starts in the downstream flow? Thanks Regards Govind

 July 28, 2011, 02:33 #2 Super Moderator   Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 14,199 Rep Power: 109 Put a line across the downstream flow and take a velocity cross section. Then push the line downstream until the velocity is fully developed to within a tolerance you specify.

July 28, 2011, 11:27
sudden expansion
#3
Senior Member

Govindaraju
Join Date: Apr 2010
Posts: 208
Rep Power: 10
Quote:
 Originally Posted by ghorrocks Put a line across the downstream flow and take a velocity cross section. Then push the line downstream until the velocity is fully developed to within a tolerance you specify.
Thanks for your information. Is there any mathematical method to calculate where the flow starts to develop fully?

Thanks

Regards

Govind

 July 28, 2011, 18:35 #4 Super Moderator   Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 14,199 Rep Power: 109 What do you mean by mathematical? My description is mathematical.

 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 carldaru ANSYS Meshing & Geometry 33 January 27, 2017 01:56 ruzfactor Main CFD Forum 0 November 26, 2010 19:21 thinktank ANSYS Meshing & Geometry 4 June 16, 2010 16:05 applemango Main CFD Forum 0 April 16, 2010 06:08 Ahmed FLUENT 0 January 2, 2006 11:01

All times are GMT -4. The time now is 20:11.

 Contact Us - CFD Online - Privacy Statement - Top