CFD Online Logo CFD Online URL
Home > Forums > CFX

Volume fraction in CFX

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

LinkBack Thread Tools Display Modes
Old   April 14, 2011, 18:03
Default Volume fraction in CFX
New Member
Join Date: Mar 2011
Posts: 4
Rep Power: 6
Wendy1984 is on a distinguished road
Hi Everyone,

I'm looking at free surface flow tutorial in CFX and it sets the Water Volume Fraction to 0.5 for Isosurface in CFD-Post to show the free surface. Just wondering why it is 0.5 not 1. I tried from 0.1 to 0.9 and they give quite different values, what do they stead for?

I'm new to CFX and thank for any advices.

Last edited by Wendy1984; April 14, 2011 at 23:15.
Wendy1984 is offline   Reply With Quote

Old   April 15, 2011, 07:02
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 11,066
Rep Power: 86
ghorrocks has a spectacular aura aboutghorrocks has a spectacular aura aboutghorrocks has a spectacular aura about
A water.volume fraction of 0 represents pure air and 1 represents pure water. So a value of 0.5 is just the half way point and is defined as the interface.
ghorrocks is online now   Reply With Quote

Old   September 2, 2011, 04:54
New Member
Join Date: Feb 2011
Location: Bhopal, M.P. (India)
Posts: 18
Rep Power: 6
vishal.indomitable is on a distinguished road
Send a message via Yahoo to vishal.indomitable
Volume of Fluid means "The volume of the fluid which you are specifying upon the volume of all the fluids which you have taken."
Ex- if you take water and air and specify vol of water as 0.2,
it means
the volume of water/ (vol of water + vol of air) = 0.2
vishal.indomitable 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
Variation in volume fraction Pravesh Kumar FLUENT 5 November 6, 2013 01:48
interDyMFoam - change in volume fraction gopala OpenFOAM Running, Solving & CFD 0 April 27, 2009 10:46
On the damBreak4phaseFine cases paean OpenFOAM Running, Solving & CFD 0 November 14, 2008 22:14
Differences between serial and parallel runs carsten OpenFOAM Bugs 11 September 12, 2008 11:16
Vanishing volume fraction Astrid CFX 7 February 5, 2003 17:23

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