# How to set the initial volume fraction?

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

 September 29, 2007, 22:07 How to set the initial volume fraction? #1 poiu0551 Guest   Posts: n/a How to set the initial volume fraction? Thank you!

 September 30, 2007, 08:14 Re: How to set the initial volume fraction? #2 K.Baker Guest   Posts: n/a you can did this with pacthing a region with vof=1 to the secondary phase. What type of flow regime you study? K.baker

 October 5, 2007, 01:01 Re: How to set the initial volume fraction? #3 poiu0551 Guest   Posts: n/a My job is to simulate a column with water,granule and air bubbles in it.The column has no cover and air flow out from the surface of the water.At the beginning,water and granules are resting in the column.Then air bubbles flow into the column from the bottom and they make the other two phase begin to flow in the column. My question is how to set the initial volume? I use E-E three-phase model and i patch the up half part of the colume with air volume fraction of 1,water and granules total of 1 in the down half part of the column.But after computing 0.01s,the volume fraction of water in the top half of the colume is nearly 0.4.I don't know why water can't get down for the function of the gravity. And the velocity of air bubble is not very large,only 0.01 m/s. I need your help! Thank you,every one!

 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 raagh77 OpenFOAM Running, Solving & CFD 98 September 23, 2013 06:31 tH3f0rC3 OpenFOAM 7 February 23, 2013 06:37 cyberbrain OpenFOAM 4 March 16, 2011 10:20 nileshjrane OpenFOAM Running, Solving & CFD 8 August 26, 2010 12:50 sunnysun OpenFOAM Running, Solving & CFD 5 March 16, 2009 04:32

All times are GMT -4. The time now is 14:57.