Journal of Hydraulic Engineering: Recent submissions
Now showing items 501-520 of 6886
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Effect of Acoustic Doppler Velocimetry Sampling Frequency on Statistical Measurements of Turbulent Axisymmetric Jets
(ASCE, 2020)Acoustic Doppler velocimeters (ADVs) are used extensively in various field and laboratory studies of hydraulic engineering. However, their accuracy in predicting statistics of turbulence quantities has been questioned. Two ... -
Development of a TFR-Based Method for the Simultaneous Detection of Leakage and Partial Blockage in Water Supply Pipelines
(ASCE, 2020)Pipe leakage and partial blockage are the two common types of pipe defects in water supply systems. In practical systems, these defects, which may cause great waste of water and energy resources and can induce potential ... -
Experimental and Numerical Analysis of Two-Phase Flows in Plunge Pools
(ASCE, 2020)The current capacity of many spillways may be insufficient due to the increase in flood flows as a result of climate change. In those cases, the dam may be overtopped, generating new loading scenarios downstream of the ... -
Comparing SWMM 5.1 Calculation Alternatives to Represent Unsteady Stormwater Sewer Flows
(ASCE, 2020)The Storm Water Management Model 5.1 (SWMM) is a widely adopted dynamic hydrologic and hydraulic model often used to estimate runoff quantity and quality in urban drainage systems. SWMM’s unsteady flow algorithm, EXTRAN, ... -
Computational Study of the Source-Area Effect for Bubble Plumes in Stratified Environments
(ASCE, 2020)In this work, a large-eddy simulation of bubble plumes in linearly stratified environments is presented. The gas bubbles are treated as Lagrangian particles. The intrusion and peeling are clearly manifested in the computed ... -
Influence of Pier Geometry and Debris Characteristics on Wood Debris Accumulations at Bridge Piers
(ASCE, 2020)This paper analyzes the influence of the geometry of bridge piers and supplied debris on the formation and growth of wood debris jams at bridge piers. A total of 162 laboratory experiments were conducted. Experimental ... -
Evolution of Flow Fields in a Developing Local Scour Hole Formed by a Submerged Wall Jet
(ASCE, 2020)This study investigates the flow in an evolving scour hole downstream of a sluice gate with an apron using particle image velocimetry (PIV). The results clearly depict the sequential appearance of four rollers (large ... -
Test and Improvement of 1D Routing Algorithms for Dam-Break Floods
(ASCE, 2020)Classical models for one-dimensional (1D) flood routing calculations were tested in a synthetic benchmark and in a real dam break case, the observed flashy hydrographs on the Doce River after the collapse of the Fundão ... -
Computational Simulation and Suppression of Oscillation Caused by Vertical Planar Jet Impinging onto a Free Surface
(ASCE, 2020)In recent studies, computational fluid dynamics (CFD) simulations in OpenFOAM have been used to model the oscillation of a planar jet impinging onto a free surface and analyze methods to suppress the subsequent flow ... -
Teaching Approaches to Select Economical Pipe Diameters in Pumping Systems
(ASCE, 2020)Pumping systems are a topic of great relevance in the teaching of civil and environmental engineering courses related to urban water infrastructure. One key component of this teaching is the diameter selection of transmission ... -
Effect of Pressure Gradient on Critical Shear Stress of Cohesive Soils
(ASCE, 2020)Part of the difficulty in simulating or understanding the erosion of cohesive soils is the near impossibility of replicating field conditions, including the constantly varying pore water pressure and resulting seepage ... -
Design, Construction, and Destruction in the Classroom: Experiential Learning with Earthen Dams
(ASCE, 2020)Early in their career, engineering students sometimes have difficulty linking academic concepts between courses and the interests that led to their enrollment. We present a design “interlude” event that is intended to ... -
Teaching Hydraulics and Hydraulic Structure Design with Leonardo da Vinci
(ASCE, 2020)Leonardo da Vinci is a fascinating and inspiring person, and is called a universal genius for his large variety of scientific and artistic interests and contributions, including military engineering, sculpture, painting, ... -
Empirical Model for Shields Diagram and Its Applications
(ASCE, 2020)The Shields diagram is a classic method for quantifying sand incipient motion in sediment transport. It is often expressed by empirical or semiempirical equations. This research applies the Padé approximant to the data in ... -
Mean Flow and Turbulence Characteristics around Multiple-Arm Instream Structures and Comparison with Single-Arm Structures
(ASCE, 2020)The characteristics of turbulent flows around two weir-like obstacles made of rocks submerged in an open channel, known as a cross vane and W-weir, were analyzed. These structures consisted of multiple structural arms that ... -
Impact of Particle Shape on Saltating Mode of Bedload Transport Sheared by Turbulent Flow
(ASCE, 2020)The saltating mode of sediment transport is the dominant mechanism of bedload transport in a fluvial stream, especially in mountainous rivers. In most simulation studies, the actual shapes of sediment particles are simplified ... -
Proof-of-Concept for Nonintrusive and Undisturbed Measurement of Sediment Infiltration Masses Using Gamma-Ray Attenuation
(ASCE, 2020)Fine sediment infiltration into gravel riverbeds adversely affects the riverine ecology and influences hyporheic exchange processes. So far, different sampling methods have been utilized to measure the amount of infiltrated ... -
Novel Environment Enables PIV Measurements of Turbulent Flow around and within Complex Topographies
(ASCE, 2020)A novel flow facility developed to enable a broad spectrum of fluid mechanics experiments involving complex geometries and employing high-fidelity optical diagnostics is described in this paper. The development of the ... -
Temporal Evolution of Clear-Water Local Scour at Aligned and Skewed Complex Bridge Piers
(ASCE, 2020)Scour at bridge piers is time-dependent. In this paper, temporal evolution of clear-water scour at complex bridge piers is studied experimentally. The pier model has a typical form comprising three components, namely a ... -
Experimental Investigation of Loading due to Debris Dams on Structures
(ASCE, 2020)The entrainment of debris in tsunami-induced floods and storm surges can result in their accumulation on structures, a phenomenon known as debris damming. Such dams can decrease the stability of the affected structures by ...