At present, turbulence closures for curved flows only account for curvature effects in the fully turbulent region where the Reynolds number is large. The justification is that, near a wall, viscous effects dominate and curvature effects are only of secondary importance. Recent direct simulation data show that this assumption is not valid, even for simple two-dimensional fully developed turbulent curved channel flows. This paper presents an approach to develop a near-wall turbulence closure for wall-bounded curved flows. The curved channel direct simulation data is used as a guide to held develop such a closure. The proposed closure has the unique property of approaching conventional high-Reynolds-number Reynolds-stress closures far away from the wall. Hence, curvature effects in both the near-wall and the fully turbulent parts of the flow are accounted for properly. Validations of the closure are carried out with a set of low-Reynolds-number simulation data and with experimental measurements at high Reynolds number. Good agreement is obtained in both cases; in particular, the anisotropic behavior of the normal stresses and the shear stress behavior near the convex and concave walls.
Near-wall turbine closure for curved flows
AIAA Journal ; 29
1991-08-01
Miscellaneous
No indication
English
Near-wall turbine closure for curved flows
AIAA | 1991
|Improving turbine endwall cooling uniformity by controlling near-wall secondary flows
Online Contents | 2017
|Improving turbine endwall cooling uniformity by controlling near-wall secondary flows
SAGE Publications | 2017
|Improving turbine endwall cooling uniformity by controlling near-wall secondary flows
Online Contents | 2016
|A k-L Turbulence Closure for Wall-Bounded Flows
AIAA | 2005
|