CFD Online Logo CFD Online URL
Home > Forums > FLUENT

Convergence Monitoring

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

LinkBack Thread Tools Display Modes
Old   August 8, 2005, 09:40
Default Convergence Monitoring
Posts: n/a
Hi All,

With iterative time advancement I can watch convergence of a flow property (e.g. velocity) at a point on a per-iteration basis.

Does anyone know how to do this with non-iterative time advancement (NITA)? I only seem to be able to get a report of the residual after each time step and have no idea what it is doing within the time step itself.

Cheers, Jim.
  Reply With Quote

Old   August 22, 2005, 19:09
Default Re: Convergence Monitoring
Posts: n/a
With the NITA schemes with either Fractional-Step or PISO scheme, there's no need for the inner iterations (velocity-pressure), hence the name NITA.That's why FLUENT report the resiudals only after each time-step. Yet the NITA schemes preserve the second-order accuracy. The only iterations being done behind the scene are for the individual linearized equations and for the coupled (and non-linear)momentum equations.
  Reply With Quote

Old   August 25, 2005, 12:49
Default Re: Convergence Monitoring
Posts: n/a
hi helper how to apply this procedure and also do u know about the variable time stepping procedure. thank u in advance bye
  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
Convergence Centurion2011 FLUENT 24 May 9, 2015 08:02
Force can not converge colopolo CFX 13 October 4, 2011 22:03
Monitoring Convergence in Stirred Tank using MRF method GOPINATH87 Main CFD Forum 0 August 19, 2011 23:45
Convergence of CFX field in FSI analysis nasdak CFX 2 June 29, 2009 01:17
Monitoring Convergence in Fluent 5.0 Tom Plikas Main CFD Forum 0 April 6, 1999 17:10

All times are GMT -4. The time now is 07:08.