Prediction of Turbulent Boundary Layers With a Second-Moment Closure: Part II—Effects of Streamline Curvature and Spanwise Rotation

1993 ◽  
Vol 115 (1) ◽  
pp. 64-69 ◽  
Author(s):  
N. Shima
Keyword(s):  
Present Model ◽  
Recovery Process ◽  
Turbulent Boundary Layers ◽  
Moment Closure ◽  
Second Moment ◽  
Streamline Curvature ◽  
Second Moment Closure ◽  
Present Part ◽  
Rotating Boundary ◽  
Spanwise Rotation

Further testing of the second-moment closure employed in Part I is made. The present part considers the effects of streamline curvature and spanwise system rotation. As expected, the exact stress production terms broadly account for these effects. In addition, the present model, which is applied right up to a wall, successfully captures the laminarization in the rotating boundary layer. Attention is also given to the capability to reproduce the recovery process from curvature.

Prediction of Turbulent Boundary Layers With a Second-Moment Closure: Part I—Effects of Periodic Pressure Gradient, Wall Transpiration, and Free-Stream Turbulence

1993 ◽  
Vol 115 (1) ◽  
pp. 56-63 ◽  
Author(s):  
N. Shima
Keyword(s):  
Pressure Gradient ◽  
Boundary Layers ◽  
Free Stream ◽  
Moment Closure ◽  
Second Moment ◽  
Free Stream Turbulence ◽  
Periodic Pressure ◽  
Second Moment Closure ◽  
Oscillating Boundary ◽  
Present Part

The purpose of this two-part paper is to assess the performance of a second-moment closure applicable up to a wall. In the present part, the turbulence model is applied to the boundary layers with periodic pressure gradient, with wall transpiration and with free-stream turbulence. The predictions are shown to be in good agreement with experiments and a direct simulation. In particular, a tendency towards relaminarization and a subsequent retransition in the oscillating boundary layer are faithfully reproduced, and the effect of the length scale of free-stream turbulence is correctly captured.

Nonlinear second moment closure consistent with shear and strain flows

AIAA Journal ◽  
1997 ◽  
Vol 35 ◽  
pp. 825-831
Author(s):  
Dirk G. Pfuderer ◽  
Claus Eifert ◽  
Johannes Janicka
Keyword(s):  
Moment Closure ◽  
Second Moment ◽  
Second Moment Closure

Computation of Discrete-Hole Film Cooling by a Near-Wall Second-Moment Turbulence Closure

1999 ◽  
Author(s):  
Hamn-Ching Chen ◽  
Gengsheng Wei ◽  
Je-Chin Han
Keyword(s):  
Film Cooling ◽  
Moment Closure ◽  
Navier Stokes ◽  
Closure Model ◽  
Complex Flow ◽  
Second Moment ◽  
Finite Analytic Method ◽  
Second Moment Closure ◽  
Effectiveness Prediction ◽  
Near Wall

Abstract A multiblock Favre-Averaged Navier-Stokes (FANS) method has been developed in conjunction with a chimera domain decomposition technique for investigation of flat surface, discrete-hole film cooling performance. The finite-analytic method solves the FANS equations in conjunction with a near-wall second-order Reynolds stress (second-moment) closure model and a two-layer k-ε model. Comparisons of flow fields and turbulence quantities with experimental data clearly demonstrate the capability of the near-wall second-moment closure model for accurate resolution of the complex flow interaction bewteen the coolant jet and the mainstream. The near-wall second-moment anisotropic model provides better agreement in adiabatic film effectiveness prediction than the two-layer k-ε model.

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