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

time step reg.

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

Reply
 
LinkBack Thread Tools Display Modes
Old   December 23, 2008, 01:36
Default time step reg.
  #1
NVSD BABU
Guest
 
Posts: n/a
Hi What is the significance of timestep in steady state solution,and what it mean in steady state solution.

Regards NVSD BABU
  Reply With Quote

Old   December 23, 2008, 17:34
Default Re: time step reg.
  #2
Glenn Horrocks
Guest
 
Posts: n/a
Hi,

In a steady state simulation it is a psuedo-timestep. It is used to advance the simulation towards convergence and it is based on a physical timestep, but it has several simplifications so is not a true timestep. These simplifications include not including some transient cross-terms and the ability to advance different equations at different rates. This means an intermediate solution is not equivalent to a transient solution, only the final converged solution is relevant.

There was a very good summary of this posted a while back, I think posted by Cyclone (not sure) but I can't seem to find it with the search. It described in detail the simplifications made in a steady state simulation.

Glenn Horrocks
  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
Extrusion with OpenFoam problem No. Iterations 0 Lord Kelvin OpenFOAM Running, Solving & CFD 8 March 28, 2016 11:08
Velocity blows up suddenly after 30,000+ iterations lordvon OpenFOAM Running, Solving & CFD 15 October 19, 2015 13:52
Time step size and max iterations per time step pUl| FLUENT 31 August 21, 2015 04:46
Full pipe 3D using icoFoam cyberbrain OpenFOAM 4 March 16, 2011 10:20
Intermediate step during a time step Burn OpenFOAM 0 July 16, 2009 10:01


All times are GMT -4. The time now is 19:05.