|November 11, 2009, 09:16||
Conservation of mass
Join Date: Nov 2009
Posts: 158Rep Power: 7
i am a Fluent user.
We all know that the finite volume method is conservative
however, we can see that in many simulations we have small mass imbalance
Is that due to roundoff errors????
do FVM still conservative for non linear equations like NS?
when the simulation diverge, we can obtain sometimes an enormous mass imbalance....
Thanks for ure replies
|November 11, 2009, 17:21||
Join Date: Oct 2009
Posts: 88Rep Power: 7
sometimes the convergence criteria there isn't all. for example in the airfol tutorial if i don't remember badly; don't use this criteria but monitor mass flow in the outflow surface. i think that you change this and go on with the interetion the bilance of mass go down.
i hope that will be helpful
|Thread||Thread Starter||Forum||Replies||Last Post|
|mass flow in is not equal to mass flow out||saii||CFX||2||September 18, 2009 08:07|
|Mass Conservation in LES||Sas||Main CFD Forum||3||July 6, 2007 10:37|
|Mass Conservation||Balaji||FLUENT||0||May 11, 2005 07:16|
|Mass conservation||Diego Nogueira||Main CFD Forum||1||July 30, 2004 15:50|
|Two-phase mass conservation ?||Michael R. Rasmussen||CFX||3||September 1, 2000 08:36|