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Old   February 28, 2001, 05:49
Default Spalart Allarmas Model
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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.


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Old   March 15, 2001, 05:40
Default Re: Spalart Allarmas Model
Rüdiger Schwarze
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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.
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