Re-evaluation of change of mean velocity profiles in turbulent open-channel flows due to introducing sediment particles

2014 ◽  
Vol 18 (7) ◽  
pp. 2261-2267
Author(s):  
Kwonkyu Yu ◽  
Byungman Yoon ◽  
Dongsu Kim
Keyword(s):  
Open Channel ◽  
Velocity Profiles ◽  
Channel Flows ◽  
Open Channel Flows ◽  
Mean Velocity ◽  
Sediment Particles

Turbulent Boundary Layers in Low Reynolds Number Shallow Open Channel Flows

1999 ◽  
Vol 121 (3) ◽  
pp. 684-689 ◽  
Author(s):  
Ram Balachandar ◽  
Shyam S. Ramachandran
Keyword(s):  
Reynolds Number ◽  
Boundary Layers ◽  
Open Channel ◽  
Reynolds Numbers ◽  
Skin Friction Coefficient ◽  
Turbulent Boundary Layers ◽  
Channel Flows ◽  
Open Channel Flows ◽  
Mean Velocity ◽  
Low Reynolds

The results of an experimental investigation of turbulent boundary layers in shallow open channel flows at low Reynolds numbers are presented. The study was aimed at extending the database toward lower values of Reynolds number. The data presented are primarily concerned with the longitudinal mean velocity, turbulent-velocity fluctuations, boundary layer shape parameter and skin friction coefficient for Reynolds numbers based on the momentum thickness (Reθ) ranging from 180 to 480. In this range, the results of the present investigation in shallow open channel flows indicate a lack of dependence of the von Karman constant κ on Reynolds number. The extent to which the mean velocity data overlaps with the log-law decreases with decreasing Reθ. The variation of the strength of the wake with Reθ is different from the trend proposed earlier by Coles.

Numerical investigation on the incipient motion of non-spherical sediment particles in bedload regime of open channel flows

2020 ◽  
Vol 7 (5) ◽  
pp. 987-1003
Author(s):  
Boxi Zhang ◽  
Dong Xu ◽  
Bingchang Zhang ◽  
Chunning Ji ◽  
Antonio Munjiza ◽  
...  
Keyword(s):  
Numerical Investigation ◽  
Open Channel ◽  
Channel Flows ◽  
Incipient Motion ◽  
Open Channel Flows ◽  
Sediment Particles
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