Journal of Hydraulic Engineering: Recent submissions
Now showing items 521-540 of 6886
-
Applied Research Can Enhance Hydraulic Engineering Education
(ASCE, 2020)Applied research projects can enhance student education in hydraulic engineering. This contention considers three lines of argument associated with societal context: historical necessity, educational merit, and issues ... -
Unsteady Hydrodynamic Behavior at Piano Key Weirs
(ASCE, 2020)Piano key weirs (PKWs) are nonlinear hydraulic structures that exhibit unsteady hydraulic phenomena. A study incorporating both physical and numerical modeling was undertaken to identify instabilities that are generated ... -
Investigation of Manhole Cover Displacement during Rapid Filling of Stormwater Systems
(ASCE, 2020)Stormwater systems are subject to operational issues while undergoing rapid filling during intense rain events. In various instances, air–water interactions take place, and it is possible that the air located in the headspace ... -
Primitive Form Godunov-Type Scheme for Two-Phase Homogeneous Water Hammer Flows
(ASCE, 2020)The primitive form second-order Godunov-type scheme is developed to simulate two-phase homogeneous water hammer flows. Compared with the previous solution schemes applied to homogeneous flows, the proposed model introduces ... -
Stability and Robustness of Real-Time Pressure Control in Water Distribution Systems
(ASCE, 2020)This paper deals with the fundamental requirement of stability of real-time control algorithms for water distribution systems. Loss of stability may in fact generate strong pressure waves that cause damages to the structure ... -
Localizing Leakage Hotspots in Water Distribution Networks via the Regularization of an Inverse Problem
(ASCE, 2020)The ill-posed inverse problem for detecting and localizing leakage hotspots is solved using a novel optimization-based method that aims to minimize the difference between hydraulic measurement data and simulated steady ... -
Underflow Curvature and Resultant Force on a Vertical Sluice Gate
(ASCE, 2020)Sluice gates are an important component of many hydraulic engineering systems; they have been extensively used to regulate reservoir water levels and to measure discharges. This paper reported new experimental and computational ... -
Effect of Inlet Turbulent Boundary Conditions on Scour Predictions of Coupled LES and Morphodynamics in a Field-Scale River: Bankfull Flow Conditions
(ASCE, 2020)This paper presents a systematic numerical investigation to study the effects of inlet turbulent boundary conditions on the coupled hydrodynamics and morphodynamics computations of a natural river, the Feather River, located ... -
Numerical Investigation of Ski Jump Hydraulics
(ASCE, 2020)The hydraulics of ski jumps is an issue of utmost importance in dam construction, the former being in practice the only existing solution as related to the dissipation of energy from high-speed spillway flows. Despite the ... -
Three-Dimensional Coherent Flow Structures during Incipient Particle Motion
(ASCE, 2020)In this study, 3D coherent flow structures during incipient particle entrainment under unidirectional flow conditions were experimentally investigated. Time-resolved tomographic particle tracking velocimetry (TOMO-PTV) and ... -
Teaching Hydraulic Design: Innovative Learning in the Classroom and the Workplace
(ASCE, 2020)Education provides the foundation for a future generation to advance the field of hydraulic engineering. This paper discussed lessons learned and techniques for educating students and new civil engineers in the field of ... -
Wave-Leak Interaction in a Simple Pipe System
(ASCE, 2020)In previous work, the authors have found that blockage-wave interaction relates to Bragg resonance effect, which is governed by the ratio of the wavelength to the length of the blockage. A direct extension of this work for ... -
Air-Pocket Entrapment Caused by Shear Flow Instabilities in Rapid-Filling Pipes
(ASCE, 2020)Understanding air-pocket formation in closed conduits is important in urban water systems subject to rapid-filling conditions, such as in the case of stormwater sewers and tunnels during intense rain events. Captured air ... -
Dynamics of Gravity Currents Flowing Up a Slope and Implications for Entrainment
(ASCE, 2020)The dynamics of lock-release gravity currents flowing up a sloping bottom are investigated by laboratory experiments. Both full-depth and partial-depth gravity currents are analyzed, and a wide range of bottom slopes are ... -
Prediction of Air-Entrained Vortex in Pump Sump: Influence of Turbulence Models and Interface-Tracking Methods
(ASCE, 2020)An air-entrained vortex is a complicated and negative phenomenon in a pump sump. Due to the unsteady vortical and two-phase-flow properties, its prediction is challenging. In this paper, advanced turbulence models sensitive ... -
Hydrokinetic Turbines in Yawed Conditions: Toward Synergistic Fluvial Installations
(ASCE, 2020)Laboratory experiments were performed in critical mobility conditions to study the effects of an in-stream horizontal axis turbine in yawed conditions. The misalignment between the rotor axis and the incoming flow velocity ... -
LIDAR Observations of Free-Surface Time and Length Scales in Hydraulic Jumps
(ASCE, 2020)A hydraulic jump is a complex, rapidly varied flow phenomenon occurring in the transition from supercritical to subcritical flows. Hydraulic jumps are characterized by instationary motions including jump toe oscillations ... -
Stochastic Galerkin Finite Volume Shallow Flow Model: Well-Balanced Treatment over Uncertain Topography
(ASCE, 2020)Stochastic Galerkin methods can quantify uncertainty at a fraction of the computational expense of conventional Monte Carlo techniques, but such methods have rarely been studied for modeling shallow water flows. Existing ... -
Conceptual Model of Salinity Intrusion by Tidal Trapping
(American Society of Civil Engineers, 2019)Shallow bays along the fringe of an estuarine channel impact salinity distribution. The primary mechanism of impact has been termed “tidal trapping,” and is a result of the phase difference between the filling and emptying ... -
Local Scour on Noncohesive Beds by a Submerged Horizontal Circular Wall Jet
(American Society of Civil Engineers, 2019)Local scour on noncohesive beds caused by horizontal circular wall jets in submerged environments is investigated in this study. The effects of the ratios of sediment size-to-hydraulic radius, Ks=d50/Rh, on the jet scour ...