Journal of Hydraulic Engineering: Recent submissions
Now showing items 301-320 of 6886
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Smoothed Particle Hydrodynamics with Unsteady Friction Model for Water Hammer Pipe Flow
(ASCE, 2021-12-01)Water hammer flows are almost simulated by using the Eulerian mesh methods including the most popular method of characteristics (MOC). In this paper, smoothed particle hydrodynamics (SPH) of the Lagrangian meshless method ... -
Experimental Investigations on Hydrodynamic Characteristics of Tsunami-Like Hydraulic Bores Impacting a Square Structure
(ASCE, 2021-12-20)Laboratory experiments investigated the effects of bed slope, initial impoundment depth, and still water level on the hydrodynamic characteristics of tsunami-like hydraulic bores generated by a rapid-release swing gate. ... -
Air Demand of a Hydraulic Jump in a Closed Conduit
(ASCE, 2021-12-07)Understanding the air demand of a hydraulic jump in a closed conduit is important in hydropower operations and urban sewer designs. In this study, physical experiments are described to study flow regimes and the air demand ... -
Confluence of Lock-Exchange Density Currents
(ASCE, 2021-12-17)Density currents represent a broad class of flows driven by gravity acting on a density difference with the ambient environment. The understanding of the underlying mechanisms of density currents and their implications on ... -
Practical Calculation of Sand-Bed River Flow Resistance
(ASCE, 2021-12-08)The dynamics of bed configurations and the effect of the bedforms on flow in sand-bed rivers are among the most challenging aspects of fluvial hydraulics to quantify. The big unknown is the resistance coefficient, without ... -
Experimental Investigation of Flood Management by an Instantaneous Levee Breach
(ASCE, 2021-11-27)Laboratory experiments were conducted to investigate the reduction of flood depth in a channel due to an engineered levee breach. Different combinations of inflow hydrographs, breach openings, and floodplain storage areas ... -
Transient Energy Analysis in Water-Filled Viscoelastic Pipelines
(ASCE, 2021-10-18)The transient flow phenomenon in a pipeline accounts for the flow variations with time and space. The transient energy analysis (TEA) overlooks the process as it sums the energy of the entire pipe domain and reports it at ... -
Assessing the Effectiveness of the IJmuiden Salt Screen Design for Nonuniform Selective Withdrawal by Physical and Numerical Modeling
(ASCE, 2021-12-15)Salt water intrusion through the New Sea Lock of IJmuiden, Netherlands requires mitigation to ensure availability of enough fresh water further inland. For this purpose, a salt screen has been proposed for selective ... -
Modeling of Sediment Transport with a Mobile Mixed-Sand Bed in Wave Motion
(ASCE, 2021-11-03)A multilayer model is proposed to calculate time-dependent sediment velocity and concentration profiles with the resulting sediment transport. The model is developed here for the wave boundary layer. Measurable quantities ... -
Shallow Flows over Curved Beds: Application of the Serre–Green–Naghdi Theory to Weir Flow
(ASCE, 2021-10-27)The Serre–Green–Naghdi (SGN) theory is used widely in maritime hydraulics for the computation of water waves from shallow to intermediate water depths. However, it has been largely ignored in problems of open-channel ... -
Investigation of Aerator Flow Pressure Fluctuation Using Detached Eddy Simulation with VOF Method
(ASCE, 2021-10-22)The detached eddy simulation model and volume of fluid (VOF) method were combined to simulate the pressure fluctuations in the downstream region of an aerator in a spillway tunnel, which often lead to hydraulic structure ... -
High-Velocity Erosion of Sand
(ASCE, 2022-02-26)Dredging is the relocation of soil. Before the soil can be transported, it has to be loosened. This can be done hydraulically (jetting) or mechanically (cutting). Often, water jets are used to erode the soil layer. Over ... -
Case Study: Experimental Investigation into the Feasibility of Pier Nose Extensions to Reduce Local Scour around Bridge Piers
(ASCE, 2021-10-18)The feasibility of pier nose extensions as an environmentally acceptable alternative to reduce local pier scour for a nontypical pier geometry was investigated using a 1:30 Froude-scaled movable-bed model. The movable-bed ... -
Numerical Study on Resistance to Flow in Meandering Channels
(ASCE, 2021-12-08)Focusing on the effect of the meandering planform, two functions are investigated by a numerical experiment: the first represents the ratio between the intensities of the resisting forces acting on a meandering flow and ... -
Comparison of Erodibility Parameters for Cohesive Streambank Soils between In Situ Jet Test Device and Laboratory Conduit Flume
(ASCE, 2021-11-09)Several methods have been developed to estimate critical shear stress τc and the erodibility coefficient kd for cohesive stream banks/beds. This research compares estimates of these parameters between an in situ minijet ... -
Comparative Study of Nonsymmetrical Trapezoidal and Rectangular Piano Key Weirs with Varying Key Width Ratios
(ASCE, 11/1/2021)Rectangular piano key weirs (RPKW) have been introduced as an innovative type of labyrinth weir with a smaller footprint and high hydraulic performance. To date, limited attention has been paid to PKWs with other planforms. ... -
High-Velocity Air–Water Flow Measurements in a Prototype Tunnel Chute: Scaling of Void Fraction and Interfacial Velocity
(ASCE, 11/1/2021)Aeration occurs in many natural and human-made flows and must be considered in engineering design. In water infrastructure, air–water flows can be violent and of very high velocity. To date, most fundamental research and ... -
Drag Forces on Subtropical Trees with Sclerophyllous Foliage Towed through Stillwater
(ASCE, 10/1/2021)Hydraulic models used to simulate floods through riparian forests along rivers need to account for flow resistance caused by tree drag. Tree drag formulations have been developed for this purpose in previous studies, using ... -
Flood-Induced Hydrodynamic and Debris Impact Forces on Single-Span Masonry Arch Bridge
(ASCE, 11/1/2021)This paper explores flood-induced hydrodynamic and debris impact forces on masonry arch bridges using the numerical method smoothed particle hydrodynamics (SPH). Masonry arch bridges make up a significant proportion of the ... -
Effect of Increasing Antecedent Flows on Equilibrium Bed-Load Transport Rates in a Laboratory Channel with a Sand and Gravel Bed Channel
(ASCE, 10/1/2021)Experiments were conducted in a laboratory flume in which gravel and total bed-load rates were measured continuously using independent methods that allowed evaluation of the effect of four antecedent flow conditions on the ...