TVD -- CFD Online Discussion Forums

November 17, 2005, 12:25	TVD	#1
TVD Guest Posts: n/a	Hi, I am wondering why it is when people are implementing TVD schemes for bounded variables like the mixture fraction in Combusting flows, why is it that they use the TVD criteria for the spatial derivatives, but often times not for the time derivatives? Surely this can still result in an unbounded solution? I have seen people to use Crank-Nicolson and Three Point Backward differences which are not TVD as well the 3rd order Runge-Kutta scheme (used by Osher) which is TVD. Can anyone explain this to me?

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 Forum Rules

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Nvd / tvd	MichiB	OpenFOAM Programming & Development	8	July 21, 2021 06:27
TVD ...	Questioner	Main CFD Forum	1	June 7, 2006 09:54
4th and 5th Order TVD Runge-Kutta Methods	saygin	Main CFD Forum	2	January 30, 2006 12:45
TVD etc..	J. K.	Main CFD Forum	9	November 11, 2004 10:27
TVD Schemes	Matt Umbel	Main CFD Forum	1	January 25, 2000 05:21

All times are GMT -4. The time now is 02:39.