# multiphase volume fraction defintion

 User Name Remember Me Password
 Register Blogs Members List Search Today's Posts Mark Forums Read

 November 9, 2010, 11:24 multiphase volume fraction defintion #1 New Member   Daniel Baeriswyl Join Date: Oct 2009 Posts: 9 Rep Power: 7 Dear all, i am doing a transient simulation. A solid is pressing in a fluid. the Fluid contains water and air. How can i define in CFX which part of the domain contains water or air ? there is no outlet and inlet. thanks for an answer. daniel

 November 9, 2010, 17:40 #2 Super Moderator   Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 10,665 Rep Power: 84 The CFX tutorials show the various ways water and air can be specified. The 2D flow over a bump one shows the free surface approach, the bubble column one shows the eularian approach.

November 18, 2010, 13:01
#3
New Member

Willian
Join Date: Jan 2010
Location: Brasil
Posts: 22
Rep Power: 7
Quote:
 Originally Posted by ghorrocks The CFX tutorials show the various ways water and air can be specified. The 2D flow over a bump one shows the free surface approach, the bubble column one shows the eularian approach.
Like ghorrocks said, the tutorial "Flow over a bump" show how you can define it. You basically define these fluids in your domain settings and create a expression using step function to define two different volume fractions.

You also can find more information in CFX manual looking for "free surface".

Good luck,
Willian

 September 2, 2011, 05:01 #4 New Member   Vishal Join Date: Feb 2011 Location: Bhopal, M.P. (India) Posts: 18 Rep Power: 6 Specify the working fluids as Water and air. That may solve your problem.

 Thread Tools Display Modes Linear Mode

 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 OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post gaottino OpenFOAM Native Meshers: blockMesh 7 July 19, 2010 14:11 gopala OpenFOAM Running, Solving & CFD 0 April 27, 2009 10:46 paean OpenFOAM Running, Solving & CFD 0 November 14, 2008 22:14 SSL FLUENT 2 January 26, 2008 12:55 Rasmus Gjesing (Gjesing) OpenFOAM Native Meshers: blockMesh 10 April 2, 2007 14:00

All times are GMT -4. The time now is 18:53.

 Contact Us - CFD Online - Top