Simultaneous measurement of turbulent velocity field and surface wave amplitude in the initial stage of an open-channel flow by PIV

2005 ◽  
Vol 39 (6) ◽  
pp. 945-953 ◽  
Author(s):  
F. -C. Li ◽  
Y. Kawaguchi ◽  
T. Segawa ◽  
K. Suga
Keyword(s):  
Surface Wave ◽  
Velocity Field ◽  
Channel Flow ◽  
Simultaneous Measurement ◽  
Wave Amplitude ◽  
Open Channel ◽  
Open Channel Flow ◽  
Turbulent Velocity ◽  
Initial Stage ◽  
Turbulent Velocity Field

Hydraulics of offset baffle culvert fishways

1988 ◽  
Vol 15 (6) ◽  
pp. 1043-1051 ◽  
Author(s):  
N. Rajaratnam ◽  
C. Katopodis ◽  
S. Lodewyk
Keyword(s):  
Experimental Study ◽  
Velocity Field ◽  
Turbulent Flow ◽  
Key Words ◽  
Channel Flow ◽  
Open Channel ◽  
Open Channel Flow ◽  
Flow Equation

This paper presents the results of an experimental study on the hydraulics of culverts with offset baffles to pass fish. Using analytical considerations and experimental observations, a flow equation has been developed between the discharge, diameter, depth, and slope for a culvert fish way with the standard offset baffle system. The velocity field at the slot has also been evaluated. Some further experiments were performed to assess the effect of baffle spacing and height on the hydraulics of the culvert fishway. Key words: culverts, fishways, baffles, hydraulics, open-channel flow, turbulent flow.

Effect of the aspect ratio on the velocity field of a straight open-channel flow

2021 ◽  
Vol 33 (8) ◽  
pp. 085110
Author(s):  
A.-M. Shinneeb ◽  
G. Nasif ◽  
R. Balachandar
Keyword(s):  
Velocity Field ◽  
Aspect Ratio ◽  
Channel Flow ◽  
Open Channel ◽  
Open Channel Flow

MODELING THE ORGANIC REMOVAL AND OXYGEN CONSUMPTION BY BIOFILMS IN AN OPEN-CHANNEL FLOW

1994 ◽  
Vol 30 (2) ◽  
pp. 53-61 ◽  
Author(s):  
Shiyu Li ◽  
Guang Hao Chen
Keyword(s):  
Water Quality ◽  
Oxygen Consumption ◽  
River Water ◽  
Channel Flow ◽  
Diffusion Layer ◽  
Open Channel ◽  
Open Channel Flow ◽  
River Water Quality ◽  
Monod Kinetics ◽  
Organic Removal

A mathematical model is proposed to predict the removal of dissolved organic substances and the consumption of dissolved oxygen by attached biofilms in an open-channel flow. The model combines the biofilm equations with the conventional Streeter–Phelps type equations of river water quality by considering the mass transfer of organics and oxygen in the river water through the diffusion layer into the biofilm. It is assumed that the diffusion and reaction within the biofilm are of steady-state, and follow Monod kinetics. The model is solved numerically with a trial-and-error method. The simulation results of the model for an ideal case of river flow and biofilm show that the organic removal rate and oxygen consumption rate caused by the biofilm are greater than that by suspended biomass. The effects of diffusion layer thickness, flow velocity, and biofilm thickness on the change of river water quality are discussed.

Sign in / Sign up

Export Citation Format

Share Document