CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > FLUENT

WAVES with VOF

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

Reply
 
LinkBack Thread Tools Display Modes
Old   December 7, 2000, 07:13
Default WAVES with VOF
  #1
Panayotis Prinos
Guest
 
Posts: n/a
Dear Colleagues We try to solve the problem of wave propagation on constant water depth using the VOF method of FLUENT 5.4 but we have not succeeded yet. We give as inlet conditions the U and V velocities as a function of time and a kind of wave is constructed near the inlet which "dies" out further downstream in contrast with the exact solution which gives unaltered waves of certain wave length in the whole domain.

I have the following questions (a) Can anyone verify that this kind of problems (propagation of upstream disturbances) can be solved with such a code ? (b) Has anyone worked with this or similar type of problem ? (c) Are there any publications with the application of FLUENT to these kind of problems.

Thank you for your response
  Reply With Quote

Old   December 17, 2000, 18:58
Default Re: WAVES with VOF
  #2
mike
Guest
 
Posts: n/a
I have been developing a similar model to investigate efficiencies of shore based wave energy devices using Fluent with the VOF model. I have been getting quite good results using a similar technique -ie using a UDF to define inlet U & V velocities. I have been using parameters with 0.5m-1m amplitude waves in 6-8m water depth. I define the height of the velocity inlet to be greater than (water depth + wave amplitude) & set the velocities above the varying water surface to be zero within the UDF. The domains I am using are only 2 or 3 wavelengths though

This has worked quite well for stokes 2nd order wave theories but it took a while to determine mesh sizing (as small as practical near surface)., modelling technique (ie geometric reconstruction)etc.. to get the modelling working.

It also takes a while for a wave of correct height to develop at the inlet starting from a flat surface due to conservation of energy

please specify any specific problems - i may be able to assist
  Reply With Quote

Reply

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
Help modelling 2d propagating water waves using vof approach ubaka Main CFD Forum 1 June 28, 2011 15:24
VOF waves breaking in my simulation mbn1454 STAR-CCM+ 4 December 12, 2010 05:27
VOF vs Level Set Method for electrohydrodynamic waves Rowland Main CFD Forum 0 July 31, 2010 22:09
Propagation of Waves with VOF Panayotis Prinos FLUENT 0 December 7, 2000 07:10
Waves with VOF Panayotis Prinos FLUENT 1 February 22, 2000 12:31


All times are GMT -4. The time now is 07:52.