Journal of Hydraulic Engineering: Recent submissions
Now showing items 221-240 of 6886
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Random Walk Particle Tracking to Model Dispersion in Steady Laminar and Turbulent Pipe Flow
(American Society of Civil Engineers, 2023/07/01)To accurately model a two-dimensional solute transport in drinking water pipes and determine the effective dispersion coefficients for one-dimensional water quality models of water distribution systems, a random walk ... -
Experimental Study of Pressure Flow due to Vertical Contraction Using Particle Image Velocimetry
(American Society of Civil Engineers, 2023/07/01)Pressure flow due to vertical contraction occurs under a bridge when the river water level rises above the bottom chord of the bridge. The flow accelerates inside the contraction and diverges downstream of it, resulting ... -
Variational Models for Nonhydrostatic Free-Surface Flow: A Unified Outlook to Maritime and Open-Channel Hydraulics Developments
(American Society of Civil Engineers, 2023/07/01)The computation of three-dimensional unsteady non-hydrostatic flows over large domains and/or for long simulation times is frequently conducted in research and practice using approximate methods to avoid the cost of a fully ... -
Influence of Piano Key Weir Crest Shapes on Flow Characteristics, Scale Effects, and Energy Dissipation for In-Channel Application
(American Society of Civil Engineers, 2023/06/01)Due to their small footprint and efficient hydraulic performance, piano key weirs (PKWs) have been gaining growing attention in the past two decades. Besides the primary geometric parameters like magnification ratio and ... -
Three-Dimensional Simulation of Transient Flows during the Emptying of Pipes with Entrapped Air
(American Society of Civil Engineers, 2023/04/01)Two- and three-dimensional analyses of transient flows considering the air–water interaction have been a challenge for researchers due to the complexity in the numerical resolution of the multiphase during emptying in ... -
Wave Boundary Layer over a Rough Bottom at Moderate Reynolds Numbers
(American Society of Civil Engineers, 2023/06/01)We make use of the partial slip boundary condition, commonly introduced to investigate steady flows, to evaluate the oscillatory flow generated close to a rough sandy bottom by propagating surface waves. Moderate values ... -
Analysis of Bedforms in the Mississippi River at Vicksburg, Mississippi, for Select Flows 2011–2016
(American Society of Civil Engineers, 2023/02/01)Quantification of sediment transport rates is necessary for river management but remains difficult due to large volumes of sediment in motion, spatiotemporal heterogeneity in discharge, depth, and morphology, the need for ... -
Experimentation and Modeling of Reach-Scale Vegetative Flow Resistance due to Willow Patches
(American Society of Civil Engineers, 2023/07/01)Reach-scale experiments simulating the physical characteristics of natural woody plants are required for the improved modeling of flow resistance in channels with instream and floodplain vegetation. The first aim of this ... -
Shallow-Flow Velocity Predictions Using Discontinuous Galerkin Solutions
(American Society of Civil Engineers, 2023/05/01)Numerical solvers of the two-dimensional (2D) shallow water equations (2D-SWE) can be an efficient option to predict spatial distribution of velocity fields in quasi-steady flows past or throughout hydraulic engineering ... -
Robust Linear PID Control of a Pressure Reducing Valve
(American Society of Civil Engineers, 2023/02/01)This work presents the design of controls for a pressure-reducing valve considering stability and robustness issues and preserving the classical linear proportional-integral-derivative (PID) structure included in, nowadays, ... -
Self-Aeration and Flow Resistance in High-Velocity Flows Down Spillways with Microrough Inverts
(American Society of Civil Engineers, 2023/06/01)Free-surface aeration is a key characteristic of high-velocity flows on spillways. Despite their common use as conveyance structures, there is a research gap in the understanding of flows across spillways with small invert ... -
Modeling Sediment Resuspension and Transport Processes Induced by Propeller Wash from Ship Traffic
(American Society of Civil Engineers, 2023/05/01)Resuspension and redistribution of sediments induced by propeller wash may significantly influence aquatic ecosystems at contaminated sediment sites. This study describes a numerical modeling method developed to predict ... -
Linking and Comparison of the Damping of Fluid Transients and Frequency Response Diagram Methods for Pipe Leak and Burst Detection and Localization
(American Society of Civil Engineers, 2023/01/01)The purpose of this study was to illustrate the relationship between methods that utilize the damping of fluid transients and approaches based on frequency response diagrams and to discuss the two methods for both leak and ... -
Analytical Modeling of Mean Velocity Profile through Two-Layered Fully Submerged Vegetation
(American Society of Civil Engineers, 2023/02/01)The mean velocity distribution of open channel flows with fully submerged two-layered vegetation can be divided into three zones. Zone 1 represents the lower region of short vegetation, where the flow has high drag because ... -
Velocities and Turbulent Stresses of Free-Surface Skimming Flows over Triangular Cavities
(American Society of Civil Engineers, 2023/06/01)Velocity distributions in supercritical open-channel flows over stepped cavities have traditionally been described using a power-law approach or theoretical solutions of plane mixing layers. These approaches were found to ... -
Flow Characteristics beneath Ice Blocks with Smooth and Rough Undersurfaces
(American Society of Civil Engineers, 2023/04/01)Separating and reattaching flows beneath semisubmerged ice blocks with smooth and rough undersurfaces were systematically studied using a planar particle image velocimetry system. The examined Froude and Reynolds numbers ... -
Forces on a Vertical Dam due to Solitary Impulse Wave Run-Up and Overtopping
(American Society of Civil Engineers, 2023/07/01)Impulse waves feature tsunami-like characteristics and are generated by very rapid mass wasting, including landslides and avalanches, into water bodies. In engineered reservoirs, these waves may run up and overtop the dam, ... -
Calculating Column Separation in Conduit Systems Using an Innovative Open Channel Based Model
(American Society of Civil Engineers, 2023/02/01)An innovative numerical model called the Modified Two-Component Pressure Approach (MTPA) is proposed to better capture the physics of column separation in conduit systems. Based on the Two-Component Pressure Approach (TPA), ... -
Toward a Complete Kinematic Description of Hydraulic Plucking of Fractured Rock
(American Society of Civil Engineers, 2023/07/01)Scour by hydraulic plucking is a fundamental process in landscape evolution in which large, competent rock blocks are eroded from a fractured rock mass by flowing water. This process also affects engineered structures ... -
Improved SWMM Modeling for Rapid Pipe Filling Incorporating Air Behavior in Intermittent Water Supply Systems
(American Society of Civil Engineers, 2023/04/01)Stormwater management model (SWMM) software has recently become a modeling tool for the simulation of intermittent water supply systems. However, SWMM is not capable of accurately simulating the air behavior in the ...