CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   FLUENT (http://www.cfd-online.com/Forums/fluent/)
-   -   Importance of Velocity Formulation (http://www.cfd-online.com/Forums/fluent/124022-importance-velocity-formulation.html)

alastairb September 26, 2013 03:53

Importance of Velocity Formulation
 
hi all,

I am having some trouble with a cfd solution I am running at work, very simplified it is solving an internal flow within a tube which is rotating.

It is being solved with a rotating reference frame, realizable k-e model + enhanced wall treatment, ideal-gas, solving for energy and using fmg initialisation.

Due to the rotation I am aware that it is best to solve velocities in the relative reference frame, however this causes the solution to diverge very quickly. But it converges if I leave the velocity formulation in the absolute reference frame.

Is using the absolute reference frame an issue if it converges?

thanks

Alastair


All times are GMT -4. The time now is 23:56.