Low-Reynolds-Number Turbulent Flows in Locally Constricted Conduits: A Comparison Study

AIAA Journal ◽  
2003 ◽  
Vol 41 (5) ◽  
pp. 831-840 ◽  
Author(s):  
Zhe Zhang ◽  
Clement Kleinstreuer
Keyword(s):  
Reynolds Number ◽  
Turbulent Flows ◽  
Low Reynolds Number ◽  
Comparison Study ◽  
Low Reynolds

Low Reynolds number turbulent flows around a dynamically shaped airfoil

2001 ◽  
Author(s):  
Yongsheng Lian ◽  
Jonas Steen ◽  
Marcus Trygg-Wilander ◽  
Wei Shyy
Keyword(s):  
Reynolds Number ◽  
Turbulent Flows ◽  
Low Reynolds Number ◽  
Low Reynolds

Low Reynolds number turbulent flows around a dynamically shaped airfoil

2003 ◽  
Vol 32 (3) ◽  
pp. 287-303 ◽  
Author(s):  
Yongsheng Lian ◽  
Jonas Steen ◽  
Marcus Trygg-Wilander ◽  
Wei Shyy
Keyword(s):  
Reynolds Number ◽  
Turbulent Flows ◽  
Low Reynolds Number ◽  
Low Reynolds

scholarly journals Low Reynolds number turbulent flows over elastic walls

2020 ◽  
Vol 32 (8) ◽  
pp. 083109 ◽  
Author(s):  
Marco E. Rosti ◽  
Luca Brandt
Keyword(s):  
Reynolds Number ◽  
Turbulent Flows ◽  
Low Reynolds Number ◽  
Low Reynolds ◽  
Elastic Walls

Low Reynolds number modeling of turbulent flows with and without wall transpiration

AIAA Journal ◽  
1987 ◽  
Vol 25 (12) ◽  
pp. 1556-1564 ◽  
Author(s):  
Ronald M. C. So ◽  
Geun Jong Yoo
Keyword(s):  
Reynolds Number ◽  
Turbulent Flows ◽  
Low Reynolds Number ◽  
Low Reynolds

CFD and 1D Approaches for the Unsteady Friction Analysis of Low Reynolds Number Turbulent Flows

2017 ◽  
Vol 143 (12) ◽  
pp. 04017050 ◽  
Author(s):  
N. M. C. Martins ◽  
B. Brunone ◽  
S. Meniconi ◽  
H. M. Ramos ◽  
D. I. C. Covas
Keyword(s):  
Reynolds Number ◽  
Turbulent Flows ◽  
Low Reynolds Number ◽  
Low Reynolds ◽  
Friction Analysis

Calculation of Transitional Boundary Layers With an Improved Low-Reynolds-Number Version of the k–ε Turbulence Model

1994 ◽  
Vol 116 (4) ◽  
pp. 765-773 ◽  
Author(s):  
D. Biswas ◽  
Y. Fukuyama
Keyword(s):  
Heat Transfer ◽  
Reynolds Number ◽  
Boundary Layers ◽  
Turbulent Flows ◽  
Free Stream ◽  
Low Reynolds Number ◽  
Turbine Rotor ◽  
Limiting Behavior ◽  
Free Stream Turbulence ◽  
Low Reynolds

Several well-known low-Reynolds-number versions of the k–ε models are analyzed critically for laminar to turbulent transitional flows as well as near-wall turbulent flows from a theoretical and numerical standpoint. After examining apparent problems associated with the modeling of low-Reynolds-number wall damping functions used in these models, an improved version of the k–ε model is proposed by defining the wall damping factors as a function of some quantity (turbulence Reynolds number Ret) that is only a rather general indicator of the degree of turbulent activity at any location in the flow rather than a specific function of the location itself, and by considering the wall limiting behavior, the free-stream asymptotic behavior, and the balance between production and destruction of turbulence. This new model is applied to the prediction of (1) transitional boundary layers influenced by the free-stream turbulence, pressure gradient, and heat transfer; (2) external heat transfer distribution on the gas turbine rotor and stator blade under different inlet Reynolds number and free-stream turbulence conditions. It is demonstrated that the present model yields improved predictions.

scholarly journals Calculation of Transitional Boundary Layers With an Improved Low-Reynolds Number Version of the k-ε Turbulence Model

1993 ◽  
Author(s):  
Debsish Biswas ◽  
Yoshitaka Fukuyama
Keyword(s):  
Heat Transfer ◽  
Reynolds Number ◽  
Boundary Layers ◽  
Turbulent Flows ◽  
Free Stream ◽  
Low Reynolds Number ◽  
Turbine Rotor ◽  
Limiting Behavior ◽  
Free Stream Turbulence ◽  
Low Reynolds

Several well known low-Reynolds version of the k-ε models are analyzed critically for laminar to turbulent transtional flows as well as near wall turbulent flows from theoretical and numerical standpoint. After examining apparent problems associated with the modelling of low-Reynolds number wall damping functions used in these models, an improved version of k-ε model is proposed by defining the wall damping factors as a function of some quantity (turbulence Reynolds number Rt) which is only a rather general indicator of the degree of turbulent activity at any location in the flow rather than a specific function of the location itself, and by considering the wall limiting behavior, the free-stream asyptotic behavior, and the balnce between production and destruction of turbulence. This new model is applied to the prediction of 1) transitional boundary layers influenced by the free-stream turbulence, pressure gradient and heat transfer; 2) external heat transfer distribution on the gas turbine rotor and stator blade under different inlet Reynolds number and free-stream turbulence conditions. It is demonstrated that the present model yield improved predictions.

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