CFD Online Logo CFD Online URL
Home > Forums > General Forums > Main CFD Forum

Front tracking

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

LinkBack Thread Tools Search this Thread Display Modes
Old   December 8, 1999, 13:11
Default Front tracking
Don Hawken
Posts: n/a
I have implimentated a front tracking algorithm using a level-set technique. I am using it to track the contact surface between water and gas. The code maintains a pre and post front state in the cell containing the cell. Fluxes across the pre and post-front faces are combined with a flux across the front and a subvolume-change term to update the solution on each step. 1D planar problems give excellent results but I have trouble with axisymmetric problems. The front speed is taken as the average flow speed on each side of the contact surface. Unfortunately, this procedure seems to underestimate the front speed since I obtain a pressure dip in the water ahead of the front when simulating expansion of a gas bubble in water. I know that the front speed is underestimated because multiplying the computed front speed by 1.1 causes a pressure spike in the water ahead of the front.

Does anyone know a better way of computing the front speed for contact between water and gas. I am also solving 2D problems with similar difficulties.

Thanks for any advice you can give.

  Reply With Quote

Old   December 12, 1999, 13:29
Default Re: Front tracking
Muhammad Akram
Posts: n/a
I guess you are working in Eulerian description. The best way to track contact discontinuties is to work in Lagrangian or material description. In your problem the distortion is not much and perhaps no re-zoning will be required.
  Reply With Quote


Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Front capturing or tracking ? Tony Main CFD Forum 10 September 10, 2015 08:34
Melt Front Tracking in Transfer Molding Alex FLUENT 0 August 2, 2008 21:43
Front Tracking Method? Danny Main CFD Forum 4 September 25, 2006 08:19
front tracking and immersed boundary Junseok Kim Main CFD Forum 0 October 3, 2004 21:18
front tracking vahid mirabolfathi Main CFD Forum 1 June 21, 2003 05:35

All times are GMT -4. The time now is 05:28.