CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   FLUENT (http://www.cfd-online.com/Forums/fluent/)
-   -   Spalart Allarmas Model (http://www.cfd-online.com/Forums/fluent/28256-spalart-allarmas-model.html)

Terry February 28, 2001 05:49

Spalart Allarmas Model
 
Hi!

Have anyone here used such model before to solve for lift and drag of a flow over a symmetric aerofoil with ground effects problem?. Would appreciate some comments on the model and how efficient and effective it is.

Thanks

Regards

Rüdiger Schwarze March 15, 2001 05:40

Re: Spalart Allarmas Model
 
One-equation models like the Spalart Allamaras model have only limited predictive capabilities because the turbulent length scale l_c must be specified empirically. Hence, the model can be used in quasi one-dimensional flow situations like fully developed pipe flows. But it is hard to determine l_c in two-dimensional situations, because l_c depends on the flow situation. Hence, a two-equation or reynolds-stress model should be used in this case.


All times are GMT -4. The time now is 02:16.