The distributions of eddy viscosity and turbulent velocity in pipe flow

AIChE Journal ◽  
1965 ◽  
Vol 11 (4) ◽  
pp. 748-759 ◽  
Author(s):  
Richard C. Seagrave
Keyword(s):  
Pipe Flow ◽  
Eddy Viscosity ◽  
Turbulent Velocity

A Three Equation Curvature and Rotation Sensitive Variant of the SST K-Omega Turbulence Model

2010 ◽  
Author(s):  
Tej Prasad Dhakal ◽  
D. Keith Walters
Keyword(s):  
Transport Equation ◽  
Eddy Viscosity ◽  
Reynolds Stress Model ◽  
Turbulent Velocity ◽  
Turbulence Structure ◽  
New Model ◽  
Streamline Curvature ◽  
History Effects ◽  
System Rotation ◽  
Velocity Scale

To date, eddy viscosity models are the most accepted and widely used RANS-based turbulence closures, attributable to their computational efficiency and relative robustness. One notable shortcoming of these models is their insensitivity to system rotation and streamline curvature. In this article, we present a variation of the SST k-ω model properly sensitized to system rotation and streamline curvature. The new model is based on a direct simplification of the Reynolds Stress Model under weak equilibrium conditions. To enhance stability and include history effects, an additional transport equation for a transverse turbulent velocity scale is added to the model. The new transport equation incorporates the physical effect of curvature and rotation on the turbulence structure. The eddy viscosity is then redefined based on the new turbulent velocity scale. The model is calibrated based on rotating homogeneous shear flow and implemented for a number of test cases including rotating channel, U-duct, and hump model flow. Compared to popular two equation models, the new model shows improved performance in system rotation and/or streamline curvature dominated flows.

Eddy viscosity model for turbulent pipe flow

AIAA Journal ◽  
1971 ◽  
Vol 9 (8) ◽  
pp. 1626-1628 ◽  
Author(s):  
GDALIA KLEINSTEIN
Keyword(s):  
Pipe Flow ◽  
Eddy Viscosity ◽  
Turbulent Pipe Flow ◽  
Viscosity Model ◽  
Eddy Viscosity Model

A test of Phillips' hypothesis for eddy viscosity in pipe flow

AIChE Journal ◽  
1968 ◽  
Vol 14 (5) ◽  
pp. 825-826 ◽  
Author(s):  
Lionel V. Baldwin ◽  
Robert D. Haberstroh
Keyword(s):  
Pipe Flow ◽  
Eddy Viscosity

The Effect of Inlet Disturbances on Turbulent Pipe Flow

1974 ◽  
Vol 16 (3) ◽  
pp. 211-213 ◽  
Author(s):  
J. Weir ◽  
A. J. Priest ◽  
V. K. Sharan
Keyword(s):  
Reynolds Number ◽  
Velocity Profile ◽  
Pipe Flow ◽  
Internal Flow ◽  
Turbulent Pipe Flow ◽  
Turbulent Velocity ◽  
Flow Component ◽  
Inlet Conditions

Disturbances near the entry to a pipe are shown to effect significantly the development of the turbulent velocity profile. The attainment of a ‘fully developed’ profile at a Reynolds number of 4 × 105 takes rather longer than is often assumed. Consequently, some care is required when designing test facilities with entry pipes (or channels) providing inlet conditions for internal flow component investigations.

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