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

Basic Poiseuille flow simulation question

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

Reply
 
LinkBack Thread Tools Display Modes
Old   October 2, 2007, 13:05
Default Basic Poiseuille flow simulation question
  #1
Ashish
Guest
 
Posts: n/a
Hi experts,

My question is very basic. I am running a simulation for Poiseuille flow in a pipe (Laminar; incompressible flow) using ADINA. I model the pipe in 3D. Pipe is long enough (Dia 4mm and lenght 60mm).

For BC : at one end I give constant velocity (inlet) and at the other 0.0 pressure. The velocity distribution becomes parabolic as it should be. But the value of peak velocity is not what I expected from Poiseuille's flow V(r)=Vmax(R^2-r^2). Same about pressure drop.

Likewise if I just give Pressure BCs at both ends, velocity distribution is parabolic but not what poisullie's eqn predicts for Vmax?

I am not familiar with computational aspects of CFD but I think I am missing something very basic. I have varried mesh size etc.?

Thanks.

Ashish

  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
Domain format problem on airfoil flow simulation andrenonaka CFX 6 December 4, 2014 04:57
What is the Difference between Re=0 and Re=0.01 in Simulation of Viscoelastic Flow andreachan Main CFD Forum 6 November 28, 2012 17:04
Simulation of a complex wing in solidworks flow simulation niels1900 FloEFD, FloWorks & FloTHERM 6 April 20, 2011 10:44
Free surface flow simulation question Jane Luo FLUENT 1 April 23, 2004 04:26
Question concerning about the flow simulation of a fan in an engine room. ghlee Main CFD Forum 3 October 21, 1998 07:05


All times are GMT -4. The time now is 18:12.