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 
Re: Spalart Allarmas Model
Oneequation 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 onedimensional flow situations like fully developed pipe flows. But it is hard to determine l_c in twodimensional situations, because l_c depends on the flow situation. Hence, a twoequation or reynoldsstress model should be used in this case.

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