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

VOF reflection from outlet boundary

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   October 10, 2013, 03:03
Default VOF reflection from outlet boundary
  #1
New Member
 
Derek Foran
Join Date: Jul 2013
Posts: 10
Rep Power: 12
OttawaCFD is on a distinguished road
Hi,

I am performing a basic VOF open channel simulation in which water is flowing around a structure. My model seems to be working correctly but I am having trouble reaching a steady state condition in terms of the velocity. The velocity seems to be oscillating over time at my test point and I think this is due to a wave reflecting from the outlet boundary. Is there a way of using non-reflecting boundaries with the VOF open channel model? Is there possible another way of avoiding these oscillations of velocity and attain steady state quicker? Any tips would be appreciated, thanks.

Derek
OttawaCFD is offline   Reply With Quote

Old   October 10, 2013, 03:22
Default
  #2
New Member
 
Join Date: Sep 2013
Location: Shanghai China
Posts: 6
Rep Power: 12
quantities is on a distinguished road
extend your computational domain to which makes the outlet is far away from your test point, it can avoid this oscillation around outlet to influence the domain that you care.
quantities is offline   Reply With Quote

Old   October 10, 2013, 13:22
Default
  #3
New Member
 
Derek Foran
Join Date: Jul 2013
Posts: 10
Rep Power: 12
OttawaCFD is on a distinguished road
I will try that, thanks for the tip!
OttawaCFD is offline   Reply With Quote

Reply

Tags
vof; nrbc

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
Outlet boundary condition for wave flume with interFoam solver Arnoldinho OpenFOAM 9 July 10, 2018 06:15
Radiation interface hinca CFX 15 January 26, 2014 18:11
An error has occurred in cfx5solve: volo87 CFX 5 June 14, 2013 18:44
CFX13 Post Periodic interface EtaEta CFX 7 December 8, 2011 18:15
Outlet boundary setup for interFoam mittal OpenFOAM Running, Solving & CFD 2 July 14, 2010 09:59


All times are GMT -4. The time now is 15:42.