Journal of Hydraulic Engineering: Recent submissions
Now showing items 121-140 of 6800
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Enhanced Physically Based Models for Pressure Characteristics at Plunge Pool Bottoms
(ASCE, 8/24/2023 )Predicting the characteristics of the dynamic pressures at plunge pool bottoms due to the impact of plunging jets is essential in designing and assessing the stability of lined or unlined plunge pool bottoms. In this ... -
Effect of Thermal Stratification in Meandering Turbulent Open-Channel Flow with Varying Sinuosity
(ASCE, 6/19/2023 )This study utilizes a detailed analysis of the first direct numerical simulation (DNS) of thermally stratified open-channel flows through idealized sine-generated meanders with varying sinuosity to enhance our understanding ... -
Nonhydrostatic Modeling of Tsunamis from Earthquake Rupture to Coastal Impact
(ASCE, 7/3/2023 1)The last decade has seen the rapid emergence of nonhydrostatic modeling as an advanced tool for studies of tsunami processes and source mechanisms that warrants a critical assessment of the state of the art and value-added ... -
Energy Analysis for Transient-Leak Interaction and Implication to Leak Detection in Water Pipeline Systems
(ASCE, 6/29/2023 )Any transient event in a pipeline system is an energy process, implying that the dynamic response can be interpreted and analyzed through energy transfer between different forms, including potential (internal), kinetic, ... -
Laboratory Investigation of the Effect of Air Injection and Trapezoidal Collar on Reducing Local Scouring around Bridge Pier
(ASCE, 8/23/2023 )Air jet system (AJS) models are assessed on the upstream face of a cylindrical pier at six depths. The system can reduce scouring by reducing the upstream vertical velocity of the pier and the downflow strength. The ... -
Turbulent Flow Field around a Cylindrical Pier on a Gravel Bed
(ASCE, 8/9/2023 1)Turbulent flow around a circular pier on a gravel bed is investigated experimentally, using particle image velocimetry. The turbulent kinetic energy (TKE), Reynolds shear stress (RSS), and vorticity are examined to understand ... -
Dimensionless Analysis of Non-Newtonian Power-Law Fluid Hammer
(ASCE, 7/4/2023 1)The current study presents a mathematical model to simulate a power-law fluid hammer problem in pipelines. The flow is considered two-dimensional, isothermal, weakly compressible, and laminar. The governing equations ... -
Empirical Determination of Free Alternate Bar Length
(ASCE, 6/7/2023 1)A new empirical equation for free alternate bar length at the fully developed state is introduced. The equation is developed on the basis of dimensional analysis and all readily available data. A special effort is also ... -
Implementation of a New Bank Erosion Model in Delft3D
(ASCE, 7/24/2023 )Bank erosion plays an important role in the hydro-morphodynamics and evolution of natural rivers. Therefore, it is essential to have a reliable bank erosion model for accurate simulation of hydro-morphodynamic processes. ... -
Frequency-Domain Stability Analysis for Hydropower Plants with Complex Tailrace Flow Using the Overall Transfer Matrix Model
(ASCE, 8/17/2023 )Frequency-domain modeling is one of the paramount mathematical techniques for the stability analysis of hydraulic systems. This paper proposes an overall transfer matrix-based frequency-domain model for a hydropower plant ... -
Air Pocket Removal during Siphon Priming
(American Society of Civil Engineers, 2023/07/01)Siphon frequently is employed in pump stations as a pump outlet with a convenient flow cutoff mode for pump shutdown, and it usually works with axial-flow pumps with a large discharge and low head. After the pump starts, ... -
Flow Dynamics and Pollutant Transport at an Artificial Right-Angled Open-Channel Junction with a Deformed Bed
(American Society of Civil Engineers, 2023/04/01)Artificial open-channel junctions have sharp corners and a smaller width-to-depth ratio. Despite numerous studies on channel junctions, knowledge on turbulent structures and their role in mixing at artificial junctions is ... -
Improved Air Valve Selection through Better Device Characterization and Modeling
(American Society of Civil Engineers, 2023/07/01)Employing a set of well-chosen and maintained air valves is a widely recommended strategy for air management in pressurized pipelines. However, precisely characterizing, modeling, and sizing air valves for the various ... -
Serre Equations in Channels and Rivers of Arbitrary Cross Section
(American Society of Civil Engineers, 2023/07/01)A variational approach was used to derive a set of Serre equations for fully nonlinear, dispersive waves in channels of arbitrary cross section. A family of travelling waves was found, as well as the relation between ... -
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 ...