Results 1 to 10 of about 1,918 (158)
Applied Water Science, 2019 Channel junctions and lateral intakes are always caused turbulence in the passing flow. In this research, an experimental study was carried out to explore a possible method for sediment control for a series of skimming walls and a single spur dike ...
Amir Moradinejad +3 more
doaj +3 more sources
Drag reduction in skimming flow on stepped spillways by aeration [PDF]
Journal of Hydraulic Research/De Recherches Hydrauliques, 2004 In skimming flows on stepped spillway, flow resistance is predominantly a form drag process. Cavity recirculation and air entrainment are intense. The interactions between entrained air bubbles and mixing layers may cause some reduction in flow resistance.
Hubert Chanson
exaly +4 more sources
Boulder concentration effects on sediment transport and deposition [PDF]
Scientific ReportsBoulders in riverbeds significantly influence sediment transport and deposition by altering local flow patterns. This study employs coupled Computational Fluid Dynamics–Discrete Element Method (CFD–DEM) simulations to examine how boulder concentration ...
Penghua Teng +3 more
doaj +2 more sources
Microsphere skimming in the porcine coronary arteries: Implications for flow quantification
Microvascular Research, 2015 Particle skimming is a phenomenon where particles suspended in fluid flowing through vessels distribute disproportionately to bulk fluid volume at junctions. Microspheres are considered a gold standard of intra-organ perfusion measurements and are used widely in studies of flow distribution and quantification.
Matthew Sinclair +2 more
exaly +7 more sources
Determination of Discharge Flow in Unit Width for the Distinction of Nappe and Skimming Flow in Stepped Spillway Using Flow 3d (Case Study: Siah Bishe Dam) [PDF]
پژوهشهای زیرساختهای عمرانی, 2020 One of the major challenges in dam engineering is the design of the discharge flow of the stepped spillway. The rate of energy dissipation in downstream currents is higher than that of skimming currents.
Aydin Shishegaran +2 more
doaj +1 more source
Experimental Study of the Effect of the Location of a Continuous Porous Obstacle on the Bottom of a Stepped Spillway on the Characteristics of the Flow [PDF]
مهندسی منابع آب, 2023 Introduction: In the present study, we investigated the effect of the location and height of a three-dimensional porous obstacle (with porosity in all three dimensions) which is located on the bottom of the steps in the width of the flume and the number ...
Seyed Amin Asghari Pari +3 more
doaj +1 more source
Effects of Converging Sidewalls on Skimming Flow over Converging Stepped Spillway
Applied Sciences, 2022 A numerical study is conducted for converging stepped spillways with various spillway slopes, sidewall convergence and flow discharges to understand the influences of converging sidewalls on skimming flows.
Yuling Chen +5 more
doaj +1 more source
Experimental Study of Flow Regimes of Stepped Weir
Wasit Journal of Engineering Sciences, 2023 • Depending on the discharge and the stepped weir's dimensions, flow over a stepped weir can be primarily divided into three different flow regimes: nappe, transition, and skimming. The different properties for each flow regime make the decision of the
Samaa Hussein, Mohammed Shamkhi
doaj +1 more source
Flow resistance in skimming flow: A critical review [PDF]
, 2020 During very large rainfall events, dams and weirs must be equipped with adequate flood release facilities for a safe dissipation of the kinetic energy of the flow. With stepped spillway design, it is essential to predict accurately the flow resistance associated with the steps.
Chanson, H., Yusuda, Y., Ohtsu, I.
openaire +2 more sources
Numerical study of energy dissipation and block barriers in stepped spillways
Journal of Hydroinformatics, 2021 In this research, the accuracy of the Flow-3D numerical model in the flow simulation in a stepped spillway was probed using data obtained from the physical model. In addition, the effects of block barriers on the energy dissipation rate were investigated.
Mehdi Karami Moghadam +2 more
doaj +1 more source