Journal of Hydraulic Engineering: Recent submissions
Now showing items 281-300 of 6886
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Extension of the 1D Unsteady Friction Model for Rapidly Accelerating and Decelerating Turbulent Pipe Flows
(ASCE, 2022/06/20)This work aims to examine the flow dynamics that contribute to the transient wall shear stress τw(t) of accelerating and decelerating turbulent pipe flows, using a series of direct numerical simulations (DNSs) of accelerating ... -
A Large Bridge Pier in an Alluvial Channel: Local Scour versus Morphological Effects and the Role of Physical Models
(ASCE, 2022/06/14)The large pier of an emblematic bridge built in 2008 in the Ebro River (Zaragoza, Spain) obstructs the flow in high floods. Clear-water scour experiments in a scale model were conducted to anticipate maximum local scour ... -
Hydraulic Scale Modeling of Mass Oscillations in a Pumped Storage Plant with Multiple Surge Tanks
(ASCE, 2022/06/24)As power systems include more intermittent renewable energy sources, energy storage solutions are needed to support them. Pumped hydro is a reliable alternative for long-term energy storage. A solution for bringing more ... -
Bedload and Concentration Effects on Turbulent Suspension Properties in Heavy Particle Sheet Flows
(ASCE, 2022/05/09)A new set of open-channel flow experiments and turbulence resolved data are presented in heavy particle sheet flows (Shields number 0.35≤θ≤0.85) for which the proportions of bedload and suspended load are both important ... -
Numerical Simulation of Scour Hole Backfilling in Unidirectional Flow
(ASCE, 2022/05/09)The computational fluid dynamics (CFD) solver FANS3D [Finite-Analytic Navier-Stokes code for three-dimensional (3D) flow] is coupled with a sediment transport model to simulate scour hole backfilling under unidirectional ... -
CFD Modeling of Scale Effects on Free-Surface Flow over a Labyrinth Weir and Spillway
(ASCE, 2022-04-18)Scale effects generated in the flow over nonlinear weirs have been studied on a limited number of occasions. Furthermore, the existing studies have been almost exclusively focused on the flows upstream of the weir, while ... -
Numerical Model for Unidirectional Diffuser in a Crossflow
(ASCE, 2022-04-18)This paper presents a mechanistic model to simulate multiple jets of a unidirectional diffuser discharging in shallow water with a strong crossflow. Due to the shallow water depth and close spacing of the jets, a sheltering ... -
Experimental Investigation of Extreme Flood Loading on Buildings Considering the Shadowing Effect of the Front Building
(ASCE, 2022-03-26)Understanding the flood impact dynamics on buildings is still a major challenge, especially considering the built environment. Motivated by the problem of the flood-structure interaction, this study experimentally measured ... -
Hydrodynamic Load on a Pervious Slab with Keyways in a Stilling Basin Lining
(ASCE, 2022-03-26)The stability of lining slabs in stilling basins is crucial for ensuring safety during flood discharge from large dams. Accordingly, this paper compares the stability of pervious slabs featuring keyways to impervious slabs ... -
Image-Based Techniques for the Advanced Characterization of Scour around Bridge Piers in Laboratory
(ASCE, 2022-03-16)The study of local scour in bridge foundations is often restricted to quantifying maximum scour depth on the upstream side. This is limiting to the understanding of the resulting scour by numerical methods, for which the ... -
Measuring Vertical Distribution and Dynamic Development of Sediment Infiltration under Laboratory Conditions
(ASCE, 2022-03-30)The complex process of sediment infiltration in gravel beds has been studied widely. However, the temporal behavior of sediment infiltration and its clogging has not yet been investigated sufficiently. To understand the ... -
Particle Entrainment from a Rectangular Cavity in Open-Channel Flows
(ASCE, 2022-03-14)Past researchers have studied particle entrainment on a flat-bed and the flow fields in a rectangular cavity without considering particle entrainment. However, particle entrainment from a rectangular cavity, which hitherto ... -
Experimental Study on Geysers in Covered Manholes during Release of Air Pockets in Stormwater Systems
(ASCE, 2022-02-28)For stormwater systems, geysers in manholes are a risk to pedestrian and vehicle safety and the urban environment. Manhole covers dancing and blowing off are reported worldwide during heavy rainfall and geyser events. These ... -
Sediment Nourishments to Mitigate Channel Bed Incision in Engineered Rivers
(ASCE, 2022-04-04)Engineering modifications of rivers, e.g., dams or groynes, often induce long-term riverbed erosion, which can be mitigated with sediment nourishments. Here, we consider nourishments to mitigate channel bed erosion ... -
Fast 3D Simulation of Nonhydrostatic Flows Using a Modified Ghost-Cell Free-Surface Pressure Treatment
(ASCE, 2022-02-21)Treatment of the free-surface pressure boundary (FSPB) remains a challenge for the three-dimensional (3D) nonhydrostatic hydrodynamic models using a vertical staggered-grid variable arrangement. Through the tests of the ... -
Turbulence Parameters during Transient Cavitation Flow in Viscoelastic Pipe
(ASCE, 2022-02-10)A two-dimensional model of distributed vaporous cavitation is developed for transient flow in a low-density polyethylene pipeline. In this model, the governing equations of transient flow are solved with viscoelastic and ... -
Fluctuating Frequency of Live Bed Scour Depth around Submerged Weirs at Equilibrium Stages
(ASCE, 2022-01-25)Previous studies have primarily focused on the estimation of equilibrium scour depths around weirs, while overlooking the details of the temporal evolution of the live bed scour process of submerged weirs at the equilibrium ... -
Partial Blockage Detection in Pipelines by Modified Reconstructive Method of Characteristics Technique
(ASCE, 2022-01-27)Blockage detection using transient analysis has emerged as a promising technique because it requires measurements at only one location. This study proposes a modified reconstructive method of characteristics (RMOC) technique ... -
Bed-Load Validation for ISSDOTv2
(ASCE, 2022-01-05)Bed-load transport is an important process impacting riverine morphology, but until recently it has proven difficult to measure in large sand-bed rivers. Integrated Section, Surface Difference Over Time, version 2 (ISSDOTv2) ... -
Novel Riprap Structure for Improved Bridge Pier Scour Protection
(ASCE, 2022-01-13)This study introduced a new riprap placement design for the purpose of reducing bridge pier scour. The design consisted of embedding a layer of the riprap around the pier, flush with the surrounding bed, with a depression ...