Journal of Hydraulic Engineering: Recent submissions
Now showing items 101-120 of 6800
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Jet-Driven Mixing Regimes Identified in the Unsteady Isothermal Filling of Rectangular Municipal Water Storage Tanks
(ASCE, 2024/03/01)Poor mixing of old and new water in municipal water storage vessels is a well-documented basis for potentially harmful water quality degradation in drinking water distribution systems. This numerical study investigates the ... -
Characterizing the Roughness in Channel Flows Using Direct Numerical Simulations
(ASCE, 2023/11/01)Turbulent flows over bumpy walls are ubiquitous and pose a fundamental challenge to various engineering applications such as coastal boundary layers, drag on ships, hydraulic conveyance networks, and bluff body aerodynamics, ... -
Generalized, Dynamic, and Transient-Storage Form of the Preissmann Slot
(ASCE, 2023/11/01)A new formulation of the Preissmann Slot for modeling surcharged (pressurized) one-dimensional (1D) pipe flow is presented. The Dynamic Preissmann Slot (DPS) is derived in a nondimensional form where the slot is treated ... -
Discharge Estimation Using Video Recordings from Small Unoccupied Aircraft Systems
(ASCE, 2023/11/01)Measurement of river discharge during flooding events has especially been a challenging and dangerous task in the southwestern US, where flows can be flashy, laden with sediment, and at high velocity. Small unoccupied ... -
Exploration of the Circumferential Velocity Structure Induced by Guide Vane-Type Spiral Flow Generators in a Pipe Flow
(ASCE, 2023/12/01)Incorporating a guide vane-type spiral flow generator can effectively resolve particle deposition issues during long-distance pipeline conveyance. Combining model experiments and computational fluid dynamics (CFD) results ... -
Impacts of Rigid Vegetation on Gravity Currents Propagating in a Stratified Environment
(ASCE, 2023/12/01)In the stratified environment, systematic experiments are carried out to understand the impacts of rigid vegetation on the evolution of lock–release gravity currents, including the propagation process and entrainment ... -
Effects of Air Vent Size and Location Design on Air Supply Efficiency in Flood Discharge Tunnel Operations
(ASCE, 2023/12/01)Low-level outlets are essential flood discharge structures for high-head dams. High-speed free-surface flows releasing into tunnels lead to substantial air discharge, and the air supply is important for gate vibration ... -
A Surrogate Model for Shallow Water Equations Solvers with Deep Learning
(ASCE, 2023/11/01)Physics-based models (PBMs), such as shallow water equations (SWEs) solvers, have been widely used in flood simulation and river hydraulics analysis. However, they are usually computationally expensive and unsuitable for ... -
Method for Estimating Clear-Water Local Scour Rate at Complex Piers
(ASCE, 7/27/2023 )When estimating design local scour depths at structures where the design flows have short durations, equilibrium scour depths can be too conservative. Attempts to develop methods to accurately estimate scour rates and times ... -
A Random Choice Scheme for Transient Mixed Flows
(ASCE, 6/5/2023 1)A novel numerical model for describing highly transient mixed flows is presented based on the Preissmann slot approach. To overcome the spurious oscillation problems caused by this approach, a numerical scheme named “random ... -
Experimental Investigation on Reservoir Sediment Flushing through a Bottom Tunnel with an Initially Covered Intake
(ASCE, 5/17/2023 )Reservoir sedimentation is of worldwide concern, involving not only reservoir benefits, but environmental and ecological issues. Sediment flushing is one of the most common and effective methods for alleviating sedimentation ... -
Turbulent Shear Flow over a Downstream-Skewed Wavy Bed: Analytical Model Based on the RANS Equations with Boussinesq Approximation
(ASCE, 6/19/2023 )This study presents an analytical model of a steady turbulent flow over a two-dimensional downstream-skewed wavy bed of small amplitude. The mathematical framework rests on the time-averaged continuity and Reynolds-averaged ... -
New Well-Balanced Path-Conservative Numerical Scheme for a Partially Relaxed Two-Layer Hydro-Sediment-Morphodynamic Model
(ASCE, 7/14/2023 )By incorporating horizontal sediment transport and bed erosion into the two-layer depth-averaged shallow water system, one can construct a hydro-sediment-morphodynamic mathematical model in which a variable sediment ... -
From Boussinesq-Type to Quasi-3D Models: A Comparative Analysis
(ASCE, 5/24/2023 )By comparing model results from tests of steady and oscillatory flows over a submerged bar (of interest for both riverine and marine environments), we highlight similarities and differences between a state-of-the-art ... -
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 ...