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The Spalart-Allmaras model is best suited for ___________

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The Spalart-Allmaras model is best suited for ___________

(a) turbulent jet flows

(b) turbulent mixing layers

(c) turbulent boundary layers with slight pressure gradients

(d) turbulent boundary layers with adverse pressure gradients

I got this question in an online quiz.

This intriguing question comes from Turbulence Modelling in division Turbulence Modelling of Computational Fluid Dynamics

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The correct option is (d) turbulent boundary layers with adverse pressure gradients

Best explanation: The Spalart-Allmaras model is suitable for flow near walls. So, it is suitable for turbulent boundary layers. The other models are also suitable for this case. But, they cannot model adverse pressure gradients for which Spalart-Allmaras is the best model.

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