CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS > FLUENT

Axial velocity problem in Fluent

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

LinkBack Thread Tools Search this Thread Display Modes
Old   May 15, 2009, 03:54
Default Axial velocity problem in Fluent
New Member
Join Date: May 2009
Posts: 4
Rep Power: 17
clueless is on a distinguished road
Near the inlet of the pipe, the axial velocity of a 500 reynold number flow is lower than that of a flow at reynold number 100. May i enquire why?
clueless is offline   Reply With Quote

Old   May 15, 2009, 15:06
Join Date: May 2009
Posts: 79
Rep Power: 17
ak6g08 is on a distinguished road

could you clarify something for me, the Re=500 is at the inlet of the pipe..where are you getting an Re=100?

in general, a reynolds number can be lower for a lower flow velocity, assuming the characteristic length is in the atmosphere (outside of the inlet), your reynolds number is much larger because your 'characteristic length' is huge, when you then move into say a pipe, your length (pipe diameter) suddenly decreases substantially, and thus results to a lower reynolds number even though your velocity goes up, but if you are comparing the inlet of a given pipe to the outlet of the same pipe, the reynolds numbers must be the same throughout, due to mass continuity...hope that helps

ak6g08 is offline   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
problem for UDF velocity Geremi FLUENT 0 April 19, 2005 02:13
Fluent problem Z FLUENT 1 April 8, 2005 04:22
problem with fluent in batch mode Pat FLUENT 2 February 13, 2003 13:14
Can I use fluent to solve this multiphase problem Steven FLUENT 1 January 24, 2003 20:52
Licensing problem with Fluent v5.5 moiami FLUENT 3 April 17, 2002 03:50

All times are GMT -4. The time now is 20:16.