CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > FLOW-3D

tank with multiple vents and outlets

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

Reply
 
LinkBack Thread Tools Display Modes
Old   July 9, 2012, 13:20
Default tank with multiple vents and outlets
  #1
New Member
 
half rho vsquared
Join Date: Feb 2012
Posts: 19
Rep Power: 4
halfrhovsquared is on a distinguished road
I have a tank with multiple vents at the top and multiple outlets at the bottom. I fill the tank to an initial fluid depth and height, set each of the inlets/outlets with a zero pressure boundary, and then run the scenario and watch how the fluid exits the tank. Pretty straightforward.

I've ran numerous scenarios so far with no problem but my latest has really got me stumped. Somehow fluid is flowing in from one of my vents at the top and I don't know how it's getting there since it's coming in higher than my initial fluid height and I have gravity going the proper direction.

Any ideas?

Last edited by halfrhovsquared; July 9, 2012 at 13:56.
halfrhovsquared is offline   Reply With Quote

Old   July 31, 2012, 19:25
Default
  #2
Member
 
Join Date: Mar 2012
Posts: 70
Rep Power: 4
dmilano is on a distinguished road
Check that f=0 at the vent.
dmilano is offline   Reply With Quote

Old   August 1, 2012, 10:42
Default
  #3
New Member
 
half rho vsquared
Join Date: Feb 2012
Posts: 19
Rep Power: 4
halfrhovsquared is on a distinguished road
Yes, my F fraction was zero.

I deleted the entire block and created a new one and for some reason it started working correctly again. Kept the same boundary conditions. Weird.
halfrhovsquared 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



All times are GMT -4. The time now is 23:42.