Research on the Flow Measurement Method and Equipment of Open Channel

2013 ◽  
Vol 303-306 ◽  
pp. 567-572
Author(s):  
Cheng Li Wang ◽  
Wei Guo Zhao ◽  
Lian Chao Dai ◽  
Wei Zhu
Keyword(s):  
Velocity Distribution ◽  
Flow Measurement ◽  
Measurement Method ◽  
Open Channel ◽  
Simulation Method ◽  
Measurement Equipment ◽  
Area Method ◽  
Fluent Simulation

In order to solve the problems of flow measurement and to obtain the sectional velocity distribution of open channel, the FLUENT simulation method was adopted. The velocity-area method based on the sectional velocity distribution was introduced, and the flow measurement equipment of open channel was also designed. The experiment result shows that the error of the method is less than 1%.

An On-line Automatic Flow Measurement Method for an Open Channel under Complex Flow Conditions

2016 ◽  
Vol 9 (7) ◽  
pp. 353-364
Author(s):  
Tanghuai Fan ◽  
Jie Shen ◽  
Guofang Lv ◽  
Jiahua Zhang ◽  
Xijun Yan
Keyword(s):  
Flow Measurement ◽  
Measurement Method ◽  
Open Channel ◽  
Flow Conditions ◽  
Complex Flow ◽  
On Line

scholarly journals Study on Flow Velocity Distribution in Open Channel With Flexible Vegetation

2021 ◽  
Vol 12 ◽  
Author(s):  
Shiyu Wang ◽  
Yi Zhou ◽  
Tongshu Li ◽  
Song Li ◽  
Mingwu Zhang ◽  
...  
Keyword(s):  
Velocity Distribution ◽  
Flow Velocity ◽  
Flow Measurement ◽  
Open Channel ◽  
Maximum Flow ◽  
Distribution Model ◽  
Turbulence Structure ◽  
River Channels ◽  
Microscopic Mechanism ◽  
Flexible Vegetation

Ecological management of river channels is a hot topic for current sustainable development and flow measurement of ecological river is an important part. In this article, a flow velocity distribution model of the channel containing flexible vegetation is constructed from the vegetation riverbed theory and the bursting phenomenon to reveal the microscopic mechanism of the flow velocity distribution in the upper layer of vegetation. In the vegetation riverbed law, the effect of flexible vegetation is evaluated by the mixed length formula. The bursting phenomenon law considers the influence of the channel sidewalls on the flow and a two-dimensional velocity model is established by introducing the concept of average turbulence structure. The mechanism of the downward shift of the maximum flow velocity point on the channel sidewall is explained. The verification of the calculated velocity profiles is carried out based on data obtained in laboratory experiments. The results show that the combination of the two models can well describe the velocity distribution of the whole channel. At the end, the phenomenon of flow velocity zoning in open channel is discussed, which provides a solution for flow measurement in ecological channel.

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