Nonlinear Kinematic-Wave Model for Predicting Open-Channel Flow Rate

1999 ◽  
Vol 125 (8) ◽  
pp. 886-889 ◽  
Author(s):  
Samuel Nii Odai
Keyword(s):  
Channel Flow ◽  
Flow Rate ◽  
Open Channel ◽  
Open Channel Flow ◽  
Wave Model ◽  
Kinematic Wave ◽  
Kinematic Wave Model

Finite element modeling of surge propagation and an application to the Hay River, N.W.T.

1992 ◽  
Vol 19 (3) ◽  
pp. 454-462 ◽  
Author(s):  
F. E. Hicks ◽  
P. M. Steffler ◽  
R. Gerard
Keyword(s):  
Finite Element ◽  
Channel Flow ◽  
Open Channel ◽  
Initial Conditions ◽  
Open Channel Flow ◽  
Kinematic Wave ◽  
Finite Element Scheme ◽  
Flow Problems ◽  
Ice Jam

This paper describes the application of the characteristic-dissipative-Galerkin method to steady and unsteady open channel flow problems. The robust performance of this new finite element scheme is demonstrated in modeling the propagation of ice jam release surges over a 500 km reach of the Hay River in Alberta and Northwest Territories. This demonstration includes the automatic determination of steady flow profiles through supercritical–subcritical transitions, establishing the initial conditions for the unsteady flow analyses. The ice jam releases create a dambreak type of problem which begins as a very dynamic situation then develops into an essentially kinematic wave problem as the disturbance propagated downstream. The characteristic-dissipative-Galerkin scheme provided stable solutions not only for the extremes of dynamic and kinematic wave conditions, but also through the transition between the two. Key words: open channel flow, finite element method, dam break, surge propagation.

Hydraulics of steeppass fishways

1991 ◽  
Vol 18 (6) ◽  
pp. 1024-1032 ◽  
Author(s):  
N. Rajaratnam ◽  
C. Katopodis
Keyword(s):  
Experimental Study ◽  
Velocity Profile ◽  
Channel Flow ◽  
Flow Rate ◽  
Open Channel ◽  
Maximum Velocity ◽  
Open Channel Flow ◽  
Width Ratio ◽  
Hydraulic Design ◽  
Theoretical Considerations

This paper presents the results of an experimental study on the hydraulics of steeppass fishways. Using theoretical considerations and experimental observations, an expression has been developed that relates the flow rate, slope of the fishway, and depth of flow. It was also found that the characteristic (similarity) velocity profile found earlier, for smaller values of depth to width ratio,y0/b, with the maximum velocity near the bottom, changes to a rather symmetrical profile with the maximum velocity occurring somewhere near the mid-depth for larger values of y0/b. A correlation has also been found for the maximum velocity. This paper also includes some observations on the M-type backwater curves that would appear in the fishway when the tailwater depths exceed uniform flow depths. Key words: fishways, hydraulics, turbulent flow, open-channel flow, hydraulic design.

Development for the Online Calibration Equipment of Open Channel Flowmeter

2012 ◽  
Vol 241-244 ◽  
pp. 538-543
Author(s):  
Wei Zhu ◽  
Wei Qi Chen ◽  
Cheng Li Wang ◽  
Wei Yong Shen ◽  
Wei Guo Zhao
Keyword(s):  
Real Time ◽  
Channel Flow ◽  
Flow Rate ◽  
Open Channel ◽  
Open Channel Flow ◽  
Feature Points ◽  
Flow Meter ◽  
Area Method ◽  
Online Calibration ◽  
Measurement Principle

In order to solve the problem of the calibration for the open-channel flow meter; the online calibration equipment was introduced. The velocity-area method was adopted as the measurement principle. The real time velocities and liquid level of different feature points in the open-channel were measured automatically. The flow rate of the open-channel was calculated and the online calibration was done.

scholarly journals Numerical investigation on the behavior of combining open-channel flow

2021 ◽  
Vol 23 (2) ◽  
pp. 1110
Author(s):  
Nor Azni Shahari ◽  
Nor Arif Husaini Norwaza ◽  
Iskandar Shah Mohd Zawawi ◽  
Nurisha Adrina Mohd Kamarul ◽  
Aimi Said
Keyword(s):  
Froude Number ◽  
Water Flow ◽  
Channel Flow ◽  
Flow Rate ◽  
Rate Ratio ◽  
Open Channel ◽  
Open Channel Flow ◽  
Flow Rate Ratio ◽  
Flow Depth ◽  
Management Schemes

Open-channel flow is known as fluid flow with an open atmospheric surface. It has become an important issue especially when measuring the flow rate and depth of water as part of environmental management schemes. Many efforts have been made by the previous researchers to investigate the behavior of water flow. However, most studies on water flow have only been carried out in a straight prismatic main channel, either in a trapezoidal and rectangular type of channel section with lateral branch of angle of 90<sup>o</sup>. In this study, the general equations of combining open-channel flow for trapezoidal and V-shaped channels are modified in the form of nonlinear polynomial equations. The proposed equations are solved using Newton-Raphson procedure to determine the upstream flow depth. All the computations and analysis of the behavior of water flow depth influenced by Froude number and flow rate ratio are performed using graphical user interface, which is designed in MATLAB software. Comparative analysis shows that the modified equations agree well with the experimental data as reported in the literature. The trapezoidal channel demonstrates the highest value of flow depth as the Froude number and flow rate ratio increase; thus, it has potential to avoid water overflow.

1113 A study for multilines flow rate measurement on open channel flow

2005 ◽  
Vol 2005 (0) ◽  
pp. 169
Author(s):  
Takahiro NISHIHARA ◽  
Masahiro TAKEI ◽  
Hiroshige KIKURA ◽  
Masanori ARITOMI ◽  
Michitsugu MORI
Keyword(s):  
Channel Flow ◽  
Flow Rate ◽  
Open Channel ◽  
Open Channel Flow ◽  
Rate Measurement ◽  
Flow Rate Measurement

Hydraulics of culvert fishways IV: spoiler baffle culvert fishways

1991 ◽  
Vol 18 (1) ◽  
pp. 76-82 ◽  
Author(s):  
N. Rajaratnam ◽  
C. Katopodis ◽  
S. Lodewyk
Keyword(s):  
Experimental Study ◽  
Turbulent Flow ◽  
Key Words ◽  
Channel Flow ◽  
Flow Rate ◽  
Open Channel ◽  
Open Channel Flow ◽  
Flow Depth

This paper presents the results of an experimental study on the hydraulics of culvert fishways with spoiler baffles. Four designs were studied with the heights of the baffles equal to 0.09D and 0.15D and longitudinal spacings of 0.53D and 1.06D, where D is the diameter of the culvert. Design equations have been developed relating the flow depth to the flow rate, the diameter and the slope of the culvert for each baffle design. Expressions have also been found for the barrier velocity. Key words: culverts, fishways, hydraulics, turbulent flow, open-channel flow.

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