# velocity more than INLET velocity

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

 May 11, 2003, 23:32 velocity more than INLET velocity #1 neu Guest   Posts: n/a Have a simple geometry of a 1cm diameter pipe. After 3 cm (from left to right)length of pipe the diameter increases to 1.2cm expanding downward. Upper wall of the pipe remains same. Have now an expansion of length 7cm giving total of 10 cm. at left side of this geometry a velocity inlet is conditioned and at right side an outflow. Velocity is given 0.0015 m/s at left side velocity inlet. Displaying contours and computing min max veolity is giving maximum velocity 0.0019 m/s which is greater than 0.0015 m/s. Is the expansion causing the velocity to increase? Or any thing wrong?

 May 12, 2003, 17:02 Re: velocity more than INLET velocity #2 Shiping Liu Guest   Posts: n/a The maximum velocity must be greater than 0.0015m/s if you set a uniform veolity at inlet, because the velocity becomes non-uniform inside the pipe. Is it turbulent flow?

 May 13, 2003, 04:34 Re: velocity more than INLET velocity #3 McGregor Guest   Posts: n/a Once the flow is fully develloped you have a velocity profile. The velocity you entered is an average. Parabolic profile as below. _________________________________ - v=0 -- --- ----v max --- -- -________________________________ Mcgregor

 May 13, 2003, 04:56 Re: velocity more than INLET velocity #4 mcgregor Guest   Posts: n/a _____________________ - v=0 --- ---- ----- v max ---- --- - _____________________

 Thread Tools Search this Thread Search this Thread: Advanced Search 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 Off Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post VT_Bromley FLUENT 3 February 12, 2011 09:02 saurus FLUENT 0 January 26, 2011 15:35 jpo FLUENT 8 December 10, 2010 07:20 Jongdae Kim FLUENT 0 June 15, 2004 11:21 chong chee nan FLUENT 0 December 29, 2001 05:13

All times are GMT -4. The time now is 11:16.

 Contact Us - CFD Online - Privacy Statement - Top