Journal of Hydraulic Engineering: Recent submissions
Now showing items 601-620 of 6886
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Flux-Form Eulerian-Lagrangian Method for Solving Advective Transport of Scalars in Free-Surface Flows
(American Society of Civil Engineers, 2019)A two-dimensional (2D) flux-form Eulerian-Lagrangian method (FFELM) on unstructured grid is proposed for solving the advection equation in free-surface scalar transport models. The scalar concentrations of backtracking ... -
Visualization Tests on Scour Rates below Pipelines in Steady Currents
(American Society of Civil Engineers, 2019)This paper presents visible experimental results of three-dimensional scour beneath pipelines. A miniature camera installed inside a transparent pipeline was used to observe the scour propagation process under a pipeline ... -
Discussion of “Applying Hypothesis of Self-Similarity for Flow-Resistance Law in Calabrian Gravel-Bed Rivers” by Vito Ferro and Paolo Porto
(American Society of Civil Engineers, 2019) -
Closure to “Applying Hypothesis of Self-Similarity for Flow-Resistance Law in Calabrian Gravel-Bed Rivers” by Vito Ferro and Paolo Porto
(American Society of Civil Engineers, 2019) -
Mixing of Tee Diffusers in Shallow Water with Crossflow: A New Look
(American Society of Civil Engineers, 2019)This paper analyzes the mixing of a tee diffuser discharging in shallow water with currents. Experiments are conducted for tee diffusers with different designs discharging in a crossflow. Measurements of dilution are ... -
Blocks Stability in Plunge Pools under Turbulent Rectangular Jets
(American Society of Civil Engineers, 2019)Energy dissipation through a rectangular jet discharging into a plunge pool is a common approach in dams engineering. This paper presents the results of a new experimental study on the pressure field generated by a rectangular ... -
Spectral-Based Methods for Pipeline Leakage Localization
(American Society of Civil Engineers, 2019)In this paper, the pipeline leak localization problem using transient data is investigated. Signal processing techniques that proved successful in wireless communications and acoustics are adapted and tested for leak ... -
Scour Protection of Partially Embedded Pipelines Using Sloping Curtains
(American Society of Civil Engineers, 2019)A geotextile mattress with sloping curtain (GMSC) was introduced to protect underwater pipelines from scour in steady currents. GMSC is a newly developed countermeasure against river and estuarine scour. To better understand ... -
Deriving Longitudinal Dispersion Coefficient Based on Shiono and Knight Model in Open Channel
(American Society of Civil Engineers, 2019)In this study, a theoretical formula for a one-dimensional longitudinal dispersion coefficient was developed using the lateral distribution equation for depth-averaged streamwise velocity derived from the Shiono and Knight ... -
Impacts of Flow and Tracer Release Unsteadiness on Tracer Analysis of Water and Wastewater Treatment Facilities
(American Society of Civil Engineers, 2019)Computational fluid dynamics (CFD) was used to investigate how residence time analysis based on passive tracer transport in environmental and chemical engineering fluid systems can be significantly affected by flow or ... -
Use of Lower Harmonics of Pressure Oscillations for Blockage Detection in Liquid Pipelines
(American Society of Civil Engineers, 2019)The transfer matrix method was applied to detect partial blockages in liquid pipelines using the first four harmonics of the pressure oscillations produced by sinusoidal opening and closing of a downstream valve. Unlike ... -
Gate-Opening Criteria for Generating Dam-Break Waves
(American Society of Civil Engineers, 2019)Dam-break waves are commonly used throughout the field of hydraulic engineering. Given the availability of several well-developed analytical solutions, as well as the relative ease with which they can be implemented as a ... -
Modeling of Sediment Transport in Steady Flow over Mobile Granular Bed
(American Society of Civil Engineers, 2019)A multilayer system with bottom, intermediate, and upper zones is proposed in order to provide full, continuous sediment velocity and concentration profiles. The model is developed with respect to different physical processes ... -
Hydraulics of Vertical-Slot Fishways: Nonuniform Profiles
(American Society of Civil Engineers, 2019)Vertical-slot fishways (VSFs) are hydraulic structures which allow fish to swim around obstacles in rivers. These structures are subject to variations in discharge of either hydrological or operational origin, which result ... -
Modeling Nonconfined Density Currents Using 3D Hydrodynamic Models
(American Society of Civil Engineers, 2019)Density currents generated by marine brine discharges, e.g., from desalination plants, can have a negative impact on marine ecosystems. It is therefore important to accurately predict their behavior. Predictions are ... -
Scour due to a Falling Plane Jet: A Comprehensive Approach
(American Society of Civil Engineers, 2019)This paper presents a theoretically based procedure for predicting the local scour depth and shape downstream of rectangular falling jets induced by high hydraulic structures. This approach, based on a theoretical analysis ... -
Analytic and CFD Models for Transient Outburst Flow
(American Society of Civil Engineers, 2019)An analytic model (AM) describes the dynamical behavior of a Newtonian fluid that is suddenly released to the atmosphere from a pressurized vessel. The discharge process is a very fast transient phenomenon in which the ... -
Estimate of Drag Coefficient for a Finite Patch of Rigid Cylinders
(American Society of Civil Engineers, 2019)This note presents laboratory measurements of the drag coefficient for a finite patch of vegetation that was simulated with a limited number of rigid cylindrical rods. The experiment was designed based on an analogy between ... -
Skeletonizing Pipes in Series within Urban Water Distribution Systems Using a Transient-Based Method
(American Society of Civil Engineers, 2019)Many skeletonization methods are available to simplify the configuration of urban water distribution systems (WDS) to enable hydraulic modeling and analysis. However, these approaches are generally based on steady-state ... -
Turbulent Length Scales and Anisotropy in Submerged Turbulent Plane Offset Jets
(American Society of Civil Engineers, 2019)Characteristics of turbulent length scales and anisotropy in different regions of a submerged turbulent plane offset jet are analyzed. The manifestation of the preattachment, impingement, and wall jet regions, including ...