CFD Online Logo CFD Online URL
Home > Forums > FLUENT

Convergence issues with long period sloshing flows

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

LinkBack Thread Tools Display Modes
Old   February 1, 2006, 08:41
Default Convergence issues with long period sloshing flows
Posts: n/a
Does anyone know any tricks to get my solution to converge for a long period (~15 secs) sloshing flow? The excitation of the domain is just some A * sin (2*Pi/T * time). If my period is long then the solution (moment time history) doesn't look smooth. If I shorten it then things look great and match theory. Any suggestions?
  Reply With Quote

Old   February 1, 2006, 09:41
Default Re: Convergence issues with long period sloshing f
Posts: n/a
By period do you mean the flow time? In this case the moment time history couldn't look smooth because of non-linear effects due to the interaction between the frequency 1/T of your excitation and the natural frequency of the fluid in the tank. As long as your solution converges well (preferably within 10 or less iterations) every time step, I never found unrealistic results...

Hope this helps

  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
Laminar Pipe Flow convergence issues preichl OpenFOAM Running, Solving & CFD 11 September 22, 2014 21:22
continuity convergence in buoyancy driven flows brossofor FLUENT 0 March 29, 2011 04:31
Grid size, convergence issues franzdrs Main CFD Forum 3 June 18, 2009 07:57
Bouyancy-driven flows and convergence Marcello Caciolo Main CFD Forum 11 March 8, 2009 04:34
Problems with convergence and initial guessed fields in compressible steady flows Pedro Gil Main CFD Forum 3 April 25, 2000 11:34

All times are GMT -4. The time now is 03:40.