CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > FLUENT

the result of the velocity and pressure drop is a little strange.

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

Reply
 
LinkBack Thread Tools Display Modes
Old   December 18, 2012, 20:48
Default the result of the velocity and pressure drop is a little strange.
  #1
Member
 
Rong Yue
Join Date: Oct 2012
Location: Canada
Posts: 65
Rep Power: 4
yuhehuan is on a distinguished road
Hi, everyone. I simulated the airlow in a box(0.25m*0.02m*0.25m) using fluent, the velocity at inlet(the bottom surface of the box) is 0.05m/s, and got the pressre drop at outlet (top surface) is 6pa/0.25m, which is close to the value i calculated by using Ergun equation. But the problem is the facet average velocity at the inlet and outlet are aslo 0.05m/s. It seems the velocity doesn't reduce from the bottom to the top. Is it resonable? And if i used a circle (r=0.005m) as the inlet, the pressure drop is very low, like 0.1pa/0.25m. So i think the pressure drop is too small. Does anybody explain it for me? I will appreciate your reply! Many thanks!
yuhehuan is offline   Reply With Quote

Reply

Thread Tools
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 On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Low pressure result in low velocity region for RNG-ke? Gabbee90 OpenFOAM Running, Solving & CFD 0 July 14, 2011 20:48
Neumann pressure BC and velocity field Antech Main CFD Forum 0 April 25, 2006 02:15
Variables Definition in CFX Solver 5.6 R P CFX 2 October 26, 2004 02:13
Terrible Mistake In Fluid Dynamics History Abhi Main CFD Forum 12 July 8, 2002 09:11
what the result is negatif pressure at inlet chong chee nan FLUENT 0 December 29, 2001 06:13


All times are GMT -4. The time now is 08:30.