CFD Online Logo CFD Online URL
Home > Forums > OpenFOAM Post-Processing

Is it possible to integrate air through a system with mixture of air and water?

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

LinkBack Thread Tools Display Modes
Old   September 30, 2013, 06:35
Default Is it possible to integrate air through a system with mixture of air and water?
Join Date: May 2013
Posts: 53
Rep Power: 4
Hale is on a distinguished road
Hi to all,

I'm using interFoam solver for solving flow through a vertical pipe with mixture of air and water. I want to check the mass conservation of air through the system by comparing the air at the inlet and outlet. In order to do that I have to find the quantities in the following equation:

Qair_inlet = Qair_domain + Qair_outlet

I can easily find the inlet and outlet air fluxes but I don't know how to find the air in the domain. Is there any way to integrate the air bobbles in the domain in OpenFOAM?

Hale is offline   Reply With Quote

Old   September 30, 2013, 08:57
Senior Member
Håkon Strandenes
Join Date: Dec 2011
Location: Norway
Posts: 111
Rep Power: 10
haakon will become famous soon enough
You can integrate up either alpha1*U&Sf() or (1-alpha1)*U&Sf() at the inlet and outlet boundaries, depending on whether alpha1 is the phase fraction of water or air.

One other alternative is possibly to integrate alpha1 over the entire domain volume, that will give you the volume of that phase (air or water) present at each timestep.

You can get some hints here: (check the latest part about volume flow out of the domain).
haakon is offline   Reply With Quote


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
mass flow in is not equal to mass flow out saii CFX 2 September 18, 2009 08:07
air bubble is disappear increasing time using vof xujjun CFX 9 June 9, 2009 07:59
air and water vapour mixture - multiphase model Saba FLUENT 0 February 10, 2009 13:05
Separation phenomenon of water, droplet and air Raymond CFX 0 July 9, 2004 22:59
Help!!!problems in air jet into water bath kim FLUENT 4 June 9, 2003 07:04

All times are GMT -4. The time now is 06:37.