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

Time discretization scheme

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

LinkBack Thread Tools Search this Thread Display Modes
Old   April 12, 2011, 19:15
Default Time discretization scheme
Senior Member
Join Date: Apr 2009
Posts: 106
Rep Power: 17
HaKu is on a distinguished road
Which time discretization scheme is better.. second order RK low disspiation low dispersion scheme or third order RK TVD scheme.. (in terms of convergence rate and effectiveness)

Secondly by doing WENO implementation in the characteristic field , does it gives any advantage over the scheme where WENo is not solved in chractersitic field??
HaKu is offline   Reply With Quote

Old   June 12, 2011, 02:06
Default RK3 vs RK2
Super Moderator
Hans Bihs
Join Date: Jun 2009
Location: Trondheim, Norway
Posts: 390
Rep Power: 18
valgrinda is on a distinguished road

The accuracy of the third order Runge- Kutta scheme is obviously higher than that of the second-order Runge-Kutta scheme. Concerning effectivness: keep in mind that for each Euler step of the Runge-Kutta scheme, the poisson equation needs to be solved. So here the second order Runge-Kutta scheme will take less time to compute.

valgrinda is offline   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
How to write k and epsilon before the abnormal end xiuying OpenFOAM Running, Solving & CFD 8 August 27, 2013 15:33
TVD scheme in unstructured finite volume discretization abcdef123 Main CFD Forum 2 January 16, 2013 00:26
directMapped problem panda60 OpenFOAM Bugs 4 July 8, 2010 10:23
Time discretisation scheme for steady state case Andrey CFX 7 September 16, 2008 03:40
VOF Discretization Scheme soy FLUENT 1 June 26, 2006 06:46

All times are GMT -4. The time now is 23:18.