CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > OpenFOAM > OpenFOAM Running, Solving & CFD


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

LinkBack Thread Tools Display Modes
Old   March 17, 2009, 03:45
Default ddtSchemes
New Member
Hubert Hérenger
Join Date: Mar 2009
Posts: 7
Rep Power: 10
herenger is on a distinguished road
Dear all.

In section 4.4.6 the User Guide states that ddtSchemes Euler is implicit. If this is the case, why would I then have to care about max. Co no.? As implicit time schemes are (unconditionally?) stable the chosen time step shouldn't affect the convergence (though affecting the physical validity of obtained results), right?
I now have a case where for a specific time step the sim. crashes after around 10 iterations whereas with a smaller time step everything just runs fine. Any explanations?

Best regards,


PS: Please feel free to redirect me to an existing thread if this discussions fits into another thread ...
herenger is offline   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
Choise of ddtSchemes regarding Dynamic Mesh Refinement TaylorTayleighInstability sega OpenFOAM Running, Solving & CFD 0 March 9, 2009 10:34

All times are GMT -4. The time now is 19:11.