CFD Online Logo CFD Online URL
Home > Forums > CFX

Bubble rise velocity

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

LinkBack Thread Tools Display Modes
Old   December 1, 2006, 15:43
Default Bubble rise velocity
Posts: n/a

I am studying behavior of a large air bubble rising in water. How I can get rise velocity from Function Calculator?

I have two ideas:

1.- Create a isovolume at air volume fraction between 0 and 1, and use function VolumeAve with air velocity as variable.

2.- Create a isosurface at air volume fraction = 0.5, and use function AreaAve with air velocity as variable.

I get different results from two ways. What is the right option? Do you have some new idea?

Thanks in advance Miguel
  Reply With Quote

Old   December 25, 2006, 20:17
Default Re: Bubble rise velocity
Posts: n/a
Hi Miguel, The bubble-water interface has to be very refined as you understand. There are couple of questions before answering your query:

1) Is it unsteady or steady? 2) 2D or 3D? 3) Is the solution grid independent?
  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
VOF single bubble rising velocity! Lincoln Main CFD Forum 3 April 10, 2012 10:04
Multiple floating objects CKH OpenFOAM 10 September 21, 2011 23:13
bubble rise velocity Xilaf Main CFD Forum 0 March 3, 2010 17:01
air bubble is disappear increasing time using vof xujjun CFX 9 June 9, 2009 07:59
Query on VOF for Bubble rise Vamsi Main CFD Forum 0 December 22, 2005 01:02

All times are GMT -4. The time now is 04:06.