Results 11 to 20 of about 2,178,021 (284)

A Flow-Measuring Algorithm of Arc-Bottomed Open Channels through Multiple Characteristic Sensing Points of the Flow-Velocity Sensor in Agricultural Irrigation Areas

Sensors, 2020
Precise flow measurement in the open channel is a key prerequisite to implementation of modern agricultural efficient water use. The channel with an arc-bottomed shape is the most common channel type in irrigation area at present.
Yu Han, Tongshu Li, Shiyu Wang, Jian Chen   +3 more
doaj   +1 more source

3D numerical modeling of flow characteristics in an open channel having in-line circular vegetation patches with varying density under submerged and emergent flow conditions

Journal of Hydrology and Hydromechanics, 2022
In the marine ecological system, the prime role of water management and durability of an ecosystem is being played by the vegetation patches. The vegetation patches in open channels can significantly affect the flow velocity, discharge capacity and ...
Tariq Hasnain, Ghani Usman, Anjum Naveed, Pasha Ghufran Ahmed   +3 more
doaj   +1 more source

Subgrid Variational Optimized Optical Flow Estimation Algorithm for Image Velocimetry

Sensors, 2022
The variational optical flow model is used in this work to investigate a subgrid-scale optimization approach for modeling complex fluid flows in image sequences and estimating their two-dimensional velocity fields.
Haoxuan Xu, Jianping Wang, Ya Zhang, Guo Zhang, Zhaolong Xiong   +4 more
doaj   +1 more source

Experimental investigations of open-channel flow and velocity to develop a predictive tool from a laboratory small scale to real-world large scale

Water Science and Technology, 2022
Open channel flow and velocity behaviour presents a dilemma for drainage systems designers where hydrologic parameters are fluctuating in space and time.
Eyad Abushandi
doaj   +1 more source

An experimental investigation of the impact of aquatic weeds trash racks on water surface profile in open channels

Water Science, 2019
A considerable quantity of weeds is drafted with flow due to maintenance activities and moving vessels causing serious problem to hydraulic structures and hydropower plants along open channels. Aquatic weed trash screens are normally constructed upstream
Mohamed Salah Abd Elmoaty
doaj   +1 more source

Shear Flows of Rapidly Flowing Granular Materials [PDF]

, 1987
Shear flows of granular materials are studied in an open channel. The wall shear is calculated from an open channel momentum equation which includes the density variations in the flow.
Brennen, C. E., Patton, J. S., Sabersky, R. H.   +2 more
core   +1 more source

Effect of flow resistance in open rectangular channel [PDF]

, 2016
The determination of flow resistance for open channels remains a challenge in practices. In this research, an experimental study was carried out to investigate the hydraulic roughness characteristics in an open channel.
Dini Mardhiyani, Dini Mardhiyani, Fazleen Izzani Abu Bakar, Fazleen Izzani Abu Bakar, Moh Fadzelly Abu Bakar, Moh Fadzelly Abu Bakar, Siti Juariah, Siti Juariah, Sri Kartini, Sri Kartini, Susi Endrini, Susi Endrini   +5 more
core   +3 more sources

Detection, Isolation, and Magnitude Estimation of Unknown Flows in Open-Channel Irrigation Systems

IEEE Access, 2021
The development of modeling and estimation strategies, useful for determining the magnitude and location of unknown flows such as seepage and leaks, appears as a valuable tool to increase the efficiency of the open-channel irrigation systems (OCIS ...
Gregory Conde, Nicanor Quijano, Carlos Ocampo-Martinez   +2 more
doaj   +1 more source

Effect of Shape of Sedient Particles at the Bed of Open Channel on Friction Coefficient [PDF]

علوم و مهندسی آبیاری, 2009
Hydraulic calculations of the flow in channel and over bank areas of flood plains require an evaluation of roughness characteristics. The Manning roughness coefficient (), Chesy coefficient () and Darsy-Weisbach coefficient () are used to describe the ...
Mohammad Bahrami Yar Ahmadi, mahmood shafai bajestan   +1 more
doaj   +1 more source

Mobile WiMAX: impact of mobility on the performance of limited feedback linear precoding [PDF]

, 2010
The mobile WiMAX standard (802.16e) uses multiple-input multiple-output (MIMO) limited feedback linear precoding to exploit the channel state information at the transmitter.
Doufexi, A, Nix, AR, Tran, T
core   +2 more sources