Turbulent velocity distribution with dip phenomenon in conic open channels

2014 ◽  
Vol 53 (1) ◽  
pp. 73-82 ◽  
Author(s):  
Junke Guo ◽  
Amin Mohebbi ◽  
Yuan Zhai ◽  
Shawn P. Clark
Keyword(s):  
Velocity Distribution ◽  
Turbulent Velocity ◽  
Open Channels

Lateral velocity distribution in open channels with partially flexible submerged vegetation

2016 ◽  
Vol 16 (6) ◽  
pp. 1267-1282 ◽  
Author(s):  
Lijuan Han ◽  
Yuhong Zeng ◽  
Li Chen ◽  
Wenxin Huai
Keyword(s):  
Velocity Distribution ◽  
Open Channels ◽  
Submerged Vegetation ◽  
Lateral Velocity

On Turbulent Flow Between Parallel Plates

1953 ◽  
Vol 20 (1) ◽  
pp. 109-114
Author(s):  
S. I. Pai
Keyword(s):  
Turbulent Flow ◽  
Velocity Distribution ◽  
Poiseuille Flow ◽  
The Other ◽  
Turbulent Velocity ◽  
Parallel Plates ◽  
Mean Velocity ◽  
Reynolds Equations ◽  
Mean Pressure ◽  
The Mean

Abstract The Reynolds equations of motion of turbulent flow of incompressible fluid have been studied for turbulent flow between parallel plates. The number of these equations is finally reduced to two. One of these consists of mean velocity and correlation between transverse and longitudinal turbulent-velocity fluctuations u 1 ′ u 2 ′ ¯ only. The other consists of the mean pressure and transverse turbulent-velocity intensity. Some conclusions about the mean pressure distribution and turbulent fluctuations are drawn. These equations are applied to two special cases: One is Poiseuille flow in which both plates are at rest and the other is Couette flow in which one plate is at rest and the other is moving with constant velocity. The mean velocity distribution and the correlation u 1 ′ u 2 ′ ¯ can be expressed in a form of polynomial of the co-ordinate in the direction perpendicular to the plates, with the ratio of shearing stress on the plate to that of the corresponding laminar flow of the same maximum velocity as a parameter. These expressions hold true all the way across the plates, i.e., both the turbulent region and viscous layer including the laminar sublayer. These expressions for Poiseuille flow have been checked with experimental data of Laufer fairly well. It also shows that the logarithmic mean velocity distribution is not a rigorous solution of Reynolds equations.

Annular Flow—A Note on the Turbulent Velocity Profile

1958 ◽  
Vol 62 (575) ◽  
pp. 830-831 ◽  
Author(s):  
Henry Barrow
Keyword(s):  
Experimental Data ◽  
Velocity Profile ◽  
Velocity Distribution ◽  
Power Law ◽  
Annular Flow ◽  
Turbulent Velocity ◽  
Concentric Annulus ◽  
Annular Section ◽  
Modified Power Law

The Important characteristics of the turbulent velocity profile of a plain concentric annulus and some of the methods of correlating the velocity distribution are briefly reviewed. The average velocities in an annular section are examined and some experimental data is correlated by a modified power law.

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