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

Time accurate?

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

LinkBack Thread Tools Search this Thread Display Modes
Old   March 24, 2008, 15:32
Default Time accurate?
Posts: n/a

Could someone please explain what the term "time accurate" means? I'm new to CFD and have been reading some textbooks on finite difference methods. I have many times read a program described as time accurate but don't know what this means.

I wondered if time accurate means that the program is accurate in time but that doesn't make much sense. Surely a program that isn't good in time would simply be wrong? I don't see the meaning of specifically saying that the program is time accurate.

  Reply With Quote

Old   March 25, 2008, 07:55
Default Re: Time accurate?
Posts: n/a
Consider that many times a problem of interest has a solution that is steady or unchanging in time. In this case it can be more efficient to solve the fluid equations that describe the steady-state behavior. The steady equations are a subset of the full NS equations. Of course, one can also reach the same solution (in theory) by solving the full NS equations that contain all the dynamic (transient) terms. Solvers that only solve the steady equations are not time-accurate, but they may do an excellent job on problems where time accuracy is not required (i.e. flow over an airfoil at low angle of attack, flow through a nozzle, etc.) Solvers that can provide solutions to the full unsteady equations are referred to as time-accurate solvers. They come into play when the problem of interest requires an unsteady solution.
  Reply With Quote

Old   March 25, 2008, 08:39
Default Re: Time accurate?
Posts: n/a
Thank you ag. This is a good explanation.

  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
Multiple floating objects CKH OpenFOAM Running, Solving & CFD 14 February 20, 2019 09:08
PostChannel maka OpenFOAM Post-Processing 5 July 22, 2009 09:15
Differences between serial and parallel runs carsten OpenFOAM Bugs 11 September 12, 2008 11:16
time accurate solution student Main CFD Forum 2 December 20, 2004 15:34
about convergence of time accurate in CFL3d stone_gargoly Main CFD Forum 0 March 20, 2003 20:22

All times are GMT -4. The time now is 11:09.