CFD Online Discussion Forums

CFD Online Discussion Forums (
-   CFX (
-   -   How to estimate uncertainity during simulation (

kpsudhakar February 17, 2012 07:24

How to estimate uncertainity during simulation
I am monitoring a CFD simulation with performance numbers (Total pressure loss).I have noticed that there is an oscillation of the performance number for every iteration(Variation in the range of +/-2.5%).Kindly let me know how could i account those variation?

Thanks in advance
Sudhakar P

m9819348 February 17, 2012 09:12

Hi sudhakar,

That depends on the physics of your simulation.

I assume it is a transient run?

+-2% is not at all abnormal.

If this answer is unsatisfactory, please provide more details.


Ries Bouwman

ghorrocks February 18, 2012 07:31

If your simulation is steady state this FAQ is for you:

Even if your simulation is transient many of the things discussed are relevant.

All times are GMT -4. The time now is 04:50.