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

Pulsatile Flow Simulation With CFX

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

Reply
 
LinkBack Thread Tools Display Modes
Old   November 14, 2010, 03:43
Exclamation Pulsatile Flow Simulation With CFX
  #1
Senior Member
 
Ashkan Javadzadegan
Join Date: Sep 2010
Posts: 234
Rep Power: 7
ashtonJ is on a distinguished road
Hi everyone

I simulated a pulsatile flow in an artery. A waveform velocity distribution is used as inlet boundary condition. I applied Average Static Pressure as the outlet boundary condition and set it to 93 mmHg. Reference pressure is set to 1 atm. While solving the problem in CFX solver, the following notice is shown:

A wall has been placed at portion(s) of an OUTLET
boundary condition (at 15% of the faces, 5 % of the area)
to prevent fluid from flowing into the domain.

The boundary condition name is: Outlet.
The fluid name is: Fluid 1.

If this situation persists, consider switching to an Opening type boundary condition instead


Please let me know what the problem of my simultion is.

Kind regards
Ashton
ashtonJ is offline   Reply With Quote

Old   November 14, 2010, 05:57
Default
  #2
Super Moderator
 
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 10,830
Rep Power: 85
ghorrocks has a spectacular aura aboutghorrocks has a spectacular aura aboutghorrocks has a spectacular aura about
This is discussed in the CFX documentation and also on this forum a million times. Do a search of the doco and this forum for the answer.

In short an outlet does not allow backflow so the flow was stopped in that section of the outlet. If the backflow is real then use a opening to more correctly model it.
ghorrocks 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
Domain format problem on airfoil flow simulation andrenonaka CFX 6 December 4, 2014 04:57
CFX Treatment of Laminar and Turbulent Flows Jade M CFX 6 January 26, 2013 11:11
CFX steady simulation gharek CFX 1 April 7, 2010 18:41
Ansys 11.0 CFX - solving electric potentials and multiphase flow cfd_multiphyiscs CFX 2 March 10, 2010 14:43
Simulation of Flow through Complex 3D Geometry EmersonKB CFX 5 July 2, 2009 08:17


All times are GMT -4. The time now is 15:05.