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

VOF model: Make extra inlet for air in the tank?

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

Like Tree1Likes
  • 1 Post By cfd seeker

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   January 11, 2013, 06:44
Default VOF model: Make extra inlet for air in the tank?
  #1
Member
 
Blue's Avatar
 
Join Date: Jul 2012
Location: India
Posts: 32
Rep Power: 11
Blue is on a distinguished road
Hi,

I am analyzing a tank by Fluent VOF model, which has one inlet at the top and three outlets at bottom. Initially half tank is filled with water and half volume by air (lower half volume has been patched for water). I have taken transient, impilcit scheme for solution+ Modified HRIC. The inlet flow rate of water has been taken as half of steady state flow rate i.e., water level of tank will go down as time will advance. This will create less space of water in tank and air will have more volume to occupy.

My questions:
(a) Do I have to make another inlet in the tank for air? Or Will air expand itself inside tank?
(b) Is this a open channel problem?
Blue is offline   Reply With Quote

Old   January 11, 2013, 06:52
Default
  #2
Senior Member
 
Join Date: Mar 2011
Location: Germany
Posts: 552
Rep Power: 17
cfd seeker is on a distinguished road
Quote:
Do I have to make another inlet in the tank for air? Or Will air expand itself inside tank?
No you don't have to make an extra inlet for air, air will expand by itself as water level decreases under gravity

Quote:
Is this a open channel problem?
No. This is Multiphase problem with air and water as two phases. Read the details of the VOF model in Fluent's theory guide
Blue likes this.
cfd seeker is offline   Reply With Quote

Old   January 11, 2013, 06:56
Default
  #3
Member
 
Blue's Avatar
 
Join Date: Jul 2012
Location: India
Posts: 32
Rep Power: 11
Blue is on a distinguished road
Thank you cfd seeker
Blue is offline   Reply With Quote

Reply

Tags
fluent, tank, vof model

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
VOF Inlet condition Rizwan FLUENT 15 July 5, 2018 16:33
Weld surface deformation by VOF model minhaj_iut FLUENT 5 February 26, 2017 23:51
What outlet BC to use for a numerical wave tank with a velocity inlet? JamesJ FLUENT 1 August 8, 2012 17:43
Heterogeneous reaction between phases with VOF model sooroo3 Fluent UDF and Scheme Programming 0 February 15, 2011 02:59
help needed for vof model yan FLUENT 3 December 16, 2005 01:17


All times are GMT -4. The time now is 14:17.