Journal of Hydraulic Engineering: Recent submissions
Now showing items 201-220 of 6886
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Uncertainty for the ISSDOTv2 Bedload Measurement Method
(ASCE, 7/13/2023 )The Integrated, Section Surface Difference Over Time, version 2 (ISSDOTv2) method provides a means of quantifying bedload in large sandbed rivers. Like all measurements, it is important to understand the uncertainty ... -
Simultaneous Measurement of Turbulent Surface Velocities and Fish Movement in an Open Channel Flow with Implications for Agent-Based Models
(ASCE, 7/5/2023 1)Fish passage design could greatly benefit from knowledge of the movement and path choices of fish in complex, turbulent environments, but empirical information required to construct and validate agent-based models is ... -
Surfing Waves from the Ocean to the River with the Serre-Green-Naghdi Equations
(ASCE, 7/3/2023 1)A wide variety of hydraulic and coastal flows can be modeled using shallow water theories, where the so-called Serre-Green-Naghdi (SGN) equations constitute a fully nonlinear and weakly dispersive wave theory that has been ... -
Coupled Second-Order GTS-MOC Scheme for Transient Pipe Flows with an Entrapped Air Pocket
(ASCE, 6/21/2023 )The fix-grid method of characteristic (MOC) has been the main numerical scheme for modeling the transient pipe flows with an entrapped air pocket, where the Courant number Cr usually equals one (i.e., Cr=1) to ensure ... -
Improved HLL Riemann Solver Including Source Term for Transient Mixed Flow
(ASCE, 8/17/2023 )The increasing number of interbasin diversion projects place high demands on fine-grained simulation and control of free-surface and transient mixed flow. Since the numerical oscillation of the transient mixed flow generates ... -
Boussinesq Models with Moving Boundaries and Their Applicability to Waves Generated by Lateral Oscillation and Bottom Deformation
(ASCE, 5/16/2023 )This paper presents analytical solutions based on Boussinesq models with moving boundaries and their applicability to the phenomena of water waves: sloshing in a rectangular tank on an oscillation table generated by lateral ... -
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 ...