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Simplified approach for sizing surge tank in long-distance pipeline systems J. Hydroaul. Res. (IF 2.3) Pub Date : 2024-03-13 Weixin Qiu, Jian Zhang, Xiaodong Yu, Yi Liu, Nan Chen
The cross-sectional area of a surge tank (CAST) is a key factor for protecting pipelines from harm by hydraulic transients. However, for long-distance pipeline systems (LDPS), the water level fluct...
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New modelling of column separation in pipelines with fluid–structure interaction and gas release J. Hydroaul. Res. (IF 2.3) Pub Date : 2024-03-04 Abdelaziz Ghodhbani, Lamjed Hadj-Taieb, Sami Elaoud
The efficiency of cavitation models depends on physical and dynamic parameters affecting the cavitating flow. The discrete gas cavity model (DGCM) is an efficient alternative to the discrete vapour...
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Analysing tsunami generation through rapid accelerated sea-floor rise: a theoretical and numerical investigation based on Boussinesq-type model J. Hydroaul. Res. (IF 2.3) Pub Date : 2024-02-29 Hidekazu Shirai, Shinichiro Onda, Takashi Hosoda
This paper describes tsunami generation through topographic rise with rapid acceleration. The phenomenon and the impact of the rapid bottom acceleration on tsunami generation were investigated both...
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Estimations of surface velocity distributions from X-band radar images during floods observed at the mouth of Tenryu River, Japan J. Hydroaul. Res. (IF 2.3) Pub Date : 2024-02-26 Ivan Aliyatul Humam, Satoshi Takewaka
X-band radar observations with a transmitting frequency of 9.4 GHz were conducted for over 10 h at the mouth of Tenryu River, Japan, to estimate surface velocity distributions during floods in 2010...
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Experimental and numerical investigation of a small scale storm sewer geyser J. Hydroaul. Res. (IF 2.3) Pub Date : 2024-02-15 Pratik Mahyawansi, Sumit R. Zanje, Abbas Sharifi, Dwayne McDaniel, Arturo S. Leon
The violent nature of storm sewer geysers has been puzzling researchers worldwide for a very long time. This paper investigates the geyser simulation methodology using a small-scale set-up, where i...
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Air entrapment modelling during pipe filling based on SWMM J. Hydroaul. Res. (IF 2.3) Pub Date : 2024-02-16 João Paulo Ferreira, David Ferràs, Dídia I. C. Covas, Job Augustijn van der Werf, Zoran Kapelan
The paper proposes a novel methodology to locate and quantify entrapped air pockets created during pipe-filling events often found in intermittent water supply systems. Different filling conditions...
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Simulations of scalar transport in oscillatory flow over a wavy wall J. Hydroaul. Res. (IF 2.3) Pub Date : 2024-02-15 Edwin R. Aponte-Cruz, Sylvia Rodríguez-Abudo
A three-dimensional model that couples Reynolds–averaged Navier–Stokes equations with an advection–diffusion solver for flow and concentration fields over a fixed, non-permeable boundary is present...
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Transient-based multiple branch detection in reservoir pipeline valve systems J. Hydroaul. Res. (IF 2.3) Pub Date : 2024-02-01 Dongwon Ko, Jeongseop Lee, Sanghyun Kim
Efficient management of pipeline assets is crucial for a reliable urban water supply. Unknown side branches in pipeline systems can hinder the prediction of hydraulic transients, owing to unexpecte...
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Effect of inflow conditions on the free-surface properties of hydraulic jumps By STEFAN FELDER, LAURA MONTANO, HANWEN CUI, WILLIAM PEIRSON and MATTHIAS KRAMER, J. Hydraulic Res. 59(6), 2021, 1004–1017, https://doi.org/10.1080/00221686.2020.1866692 J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-12-12 Discussers: Masayuki Takahashi, Ryugen Satoh, Iwao Ohtsu
Published in Journal of Hydraulic Research (Vol. 61, No. 6, 2023)
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Closure to “Effect of inflow conditions on the free-surface properties of hydraulic jumps” by S. FELDER, L. MONTANO, H. CUI, W. PEIRSON, and M. KRAMER, J. Hydraulic Res. 59(6), 2021, 1004–1017, https://doi.org/10.1080/00221686.2020.1866692 J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-12-12 Stefan Felder, Laura Montano, Hanwen Cui, Matthias Kramer
Published in Journal of Hydraulic Research (Vol. 61, No. 6, 2023)
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Correction J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-12-11
Published in Journal of Hydraulic Research (Vol. 62, No. 1, 2024)
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Numerical investigation of cavitating flow in centrifugal pump with improved partially-averaged Navier–Stokes method J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-11-16 Xiaolin Wang, Yong Wang, Xiao Yuan, Houlin Liu, Linglin Jiang, Wei Xiong
The objectives of this paper are to pursue an accurate numerical method of unsteady cavitating flow at a reasonable calculation cost and investigate the unsteady cavitating flow characteristics of ...
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Effect of lateral confinement on wave generation and attenuation induced by granular debris J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-11-16 Yu-Xiang Hu, Xing-Yu Long, Hai-Bo Li, Cong-Jiang Li, Jia-Wen Zhou
The lateral confinement effect significantly influences wave amplitude at the generation and propagation stage. A series of physical experiments and numerical simulations considering different para...
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Experimental investigation of the hydrodynamic field around a half-cone woody debris jam on a bridge pier J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-11-16 Wenjun Zhang, Colin D. Rennie, Ioan Nistor
A debris jam causes extra load and associated scour on a bridge pier, and this significantly affects the safety of the bridge. Laboratory experiments were conducted to investigate the flow field ar...
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Finite volume analysis of dam breaking subjected to earthquake accelerations J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-11-16 Farshid Mosaddeghi, Mete Koken, Ismail Aydin
Because of the complexity of the dam failure mechanism due to earthquakes that occur under the simultaneous influence of hydraulic and seismic forces, a single model has not been obtained so far an...
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Gravity currents from a constant inflow on unbounded uniform slopes J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-11-16 Ching-Sen Wu, Albert Dai
In this study we conducted laboratory experiments to examine the gravity currents produced from a constant inflow propagating on unbounded uniform slopes in the range 0∘≤θ≤15∘. In the experiments, ...
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Investigation of asymmetric gravity current collision with LES J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-11-16 Angelos Kokkinos, Panagiotis Prinos
This study presents LES results of two colliding gravity currents, with different densities and/or heights, in a half-depth lock-exchange set-up. The dynamical features of collision for gravity cur...
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Effect of leading-edge geometry on flow beneath a simulated ice block J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-11-16 Baafour Nyantekyi-Kwakye, Tanzim Ahmed, Karen Dow
The present article conducted detailed velocity measurements beneath simulated ice blocks with different leading-edge geometries (round, rectangular, upward and downward triangular). The results ex...
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Transition from undular jump to breaking jump J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-11-16 Manoj Langhi, Takashi Hosoda
In the present study, a one-dimensional governing equation with a vertical acceleration term is used to analyse the free surface profile of various types of jumps. Initially, the surface profile of...
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Numerical investigation of air demand by the free surface tunnel flows By WANGRU WEI, JUN DENG and WEILIN XU, J. Hydraulic Res. 59(1), 2021, 158--165, https://doi.org/10.1080/00221686.2020.1744747 J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-10-20 Matthias Bürgler, Benjamin Hohermuth, David F. Vetsch, Robert M. Boes
The authors developed a novel design equation based on numerical model results by taking into account the effects of water velocity and residual tunnel cross-sectional area above the water surface....
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Closure to “Numerical investigation of air demand by the free surface tunnel flows” by WANGRU WEI, JUN DENG and WEILIN XU, J. Hydraulic Res. 59(1), 2021, 158–165, https://doi.org/10.1080/00221686.2020.1744747 J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-10-20 Wangru Wei, Jun Deng, Weilin Xu
Published in Journal of Hydraulic Research (Vol. 61, No. 5, 2023)
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Main channel width effects on overtopping-induced non-cohesive fluvial dike breaching J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-09-15 Vincent Schmitz, Ismail Rifai, Lydia Kheloui, Sebastien Erpicum, Pierre Archambeau, Damien Violeau, Michel Pirotton, Kamal El Kadi Abderrezzak, Benjamin Dewals
Laboratory experiments were conducted on the breaching of homogeneous non-cohesive sandy fluvial dikes induced by flow overtopping. Tests were conducted using a main channel, an erodible lateral di...
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Application of CFD to predict the sluice gate jammed J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-09-19 Chuanming Sheng, Fang Liu, Chao Ma, Jijian Lian, Bin Ma
The problem of sluice gate jamming in moving water occurs frequently in engineering practice. In this study, the reason for gate jamming is investigated by using computational fluid dynamics and ve...
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On the dynamics of gravity current motion in a stratified ambient J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-09-19 Angelos Kokkinos, Panagiotis Prinos
This study presents LES results of lock-release propagating gravity current (GC) at the base of a linearly stratified ambient. The focus of the study is to investigate the effect of ambient stratif...
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Air entrainment and free-surface fluctuations in A-type hydraulic jumps with an abrupt drop J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-09-19 Maoyi Luo, Hang Wang, Xiaohui Zheng, Davide Wüthrich, Ruidi Bai, Shanjun Liu
In high dam construction projects in China, stilling basin design with an abrupt bottom drop is sometimes introduced to reduce the bottom velocity and pressure loads by generating A-type hydraulic ...
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Bed morphology adjustment under the impact of a near-bank emergent model vegetation patch J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-09-19 Xu-Feng Yan, Huan-Feng Duan, Wing-Hong Onyx Wai, Xie-Kang Wang
This paper investigated spatial characteristics of bed morphology around a near-bank emergent vegetation patch. Experimental results showed that patch length and density impacted the spatial scale,...
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Finite-volume coupled surface-subsurface flow modelling in earth dikes J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-09-19 Nathan Delpierre, Hadrien Rattez, Sandra Soares-Frazao
Earthen embankments are subjected to increasing threats because of climate change inducing sequences of severe drought periods followed by floods, possibly leading to overtopping of the structures....
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Hydrodynamics and turbulence of free-surface flow over a backward-facing step J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-09-15 Qianyu Luo, Thorsten Stoesser, Razieh Jalalabadi, Zhihua Xie
ABSTRACT Three large-eddy simulations of open channel flow over a backward-facing step are performed to investigate the effect of submergence on the turbulence, hydrodynamics, and water surface deformation downstream of the step. The deformation of the water surface, the extent of the recirculation zone as well as the strength of the shear layer are a function of relative submergence. All flows downstream
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Linear and nonlinear frequency-domain modelling of oscillatory flow over submerged canopies J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-09-15 Otto E. Neshamar, Niels G. Jacobsen, Dominic A. van der A, Tom O'Donoghue
An analytical and experimental study of flow velocities within submerged canopies of rigid cylinders under oscillatory flows is presented, providing insights into the momentum transfer mechanisms between the different flow harmonics. The experimental dataset covers an unprecedented wide range of flow amplitudes with in-canopy velocity reductions ranging between 0.2 and 0.8 of the free stream velocity
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Simulation of laminar to transitional wakes past cylinders with a discontinuous Galerkin inviscid shallow water model J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-09-15 Xitong Sun, Georges Kesserwani, Mohammad Kazem Sharifian, Virginia Stovin
Laminar to transitional wakes occur in slow, quasi-steady flows past cylinders at low cylinder Reynolds numbers (Red ≤ 250). Inviscid numerical solvers of the depth-averaged shallow water equations (SWE) introduce numerical dissipation that, depending on Red, may imitate the mechanisms of viscous turbulent models. However, the numerical dissipation rate in a second-order finite volume (FV2) SWE solver
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Assessment of interfacial turbulence treatment models for free surface flows J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-09-15 Pengxu Zou, Taeksang Kim, Jeremy D. Bricker, Wim S.J. Uijttewaal
The modelling of complex free surface flows is challenging due to the mobility and deformability of the interface and air entrainment characteristics, which are highly affected by turbulence. With the framework of Reynolds averaged Navier–Stokes (RANS) models and the volume of fluid (VOF) method, turbulence quantities at the air–water interface tend to be over-estimated. In this study, interfacial
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Effects of relative curvature radius on erosion and sedimentation patterns in a 90o bend with and without bendway weirs J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-09-13 Mohsen Salehzadeh, Mohammad Hemmati, Mehdi Yasi, Stefano Lanzoni
Bendway weirs are low-level transverse structures constructed on the outer bank of a channel bend to improve navigation, create aquatic habitat and control bend migration. This experimental study w...
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On application of empirical mode decomposition for turbulence analysis in open-channel flows J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-09-13 Andrea Zampiron, Stuart M. Cameron, Vladimir Nikora
Large-scale coherent structures are key elements of open-channel flow turbulence, quantification of which remains elusive. In this work, we use empirical mode decomposition (EMD) to break down a ve...
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Analysis of the riverbed backscattered signal registered by ADCPs in different bedload transport conditions – field application J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-08-18 Slaven Conevski, Massimo Guerrero, Axel Winterscheid, Doreen Faltis, Colin D. Rennie, Nils Ruther
Acoustic Doppler current profilers (ADCP) were deployed to investigate the backscattering (BS) signal in three navigable rivers, in different bedload transport conditions. This study aims to demonstrate that the BS strength, as an additional variable to the apparent bedload velocity, improves the characterization of the bedload transport using ADCPs. The M9 –3 MHz and the vertical beam M9 – 0.5 MHz
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Experimental investigation on flow of trash rack blockage in front of pumping station J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-08-14 Tianxu Yan, Baoyun Qiu, Jianping Yuan, Guipeng Qi
Trash rack blockage significantly affects the water levels and velocity distributions near trash racks, influencing the performance of subsequent hydraulic systems. An experiment was conducted wher...
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Two simple theoretical models for teaching wave mechanics in coastal engineering J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-08-11 Gerald Müller
Waves are an integral component of teaching in coastal engineering. Some aspects of wave theory are however complex and outside the scope of e.g. introductory courses, so that only the results of the theory are used. For other wave effects such as overtopping, no theory exists, and purely empirical formulas are employed. This limits the students’ understanding of the problems. At Southampton University
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Attachment efficiency among fine sediment considering surface heterogeneity J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-08-07 Zhenghui Cui, Lei Huang, Hongwei Fang, Fabian A. Bombardelli, Dianchang Wang, Xinghua Wu
Interactions among natural fine sediment particles are essential to the flocculation process, and are affected significantly by surface heterogeneity. In this study, a series of mathematical sedime...
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Cavitation evolution and flow field characteristics of transient flows with multi-point water-column separations in undulating pipeline J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-08-07 Guohong Wu, Xuelin Tang, Xiaoqin Li, Qiang Zhong, Jianghui Zhu, Xiaoyan Shi
Transient flows with water-flow-induced multi-point cavitation inside an undulating pipeline are investigated experimentally under conditions of fast valve closure for three typical test cases by using high-precision pressure transducers, high-speed photography and particle image velocimetry (PIV) techniques. For low initial velocity condition, the transient pressure at the monitoring point (PT1) downstream
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Simple criterion for evaluating stability of hydraulic oscillation based on water-hammer reflection coefficients J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-08-07 Jian Zhang, Long Chen, Yongguang Cheng, Hui Xu, Xuyun Chen, Dongliang Hu
Hydraulic oscillation is a fluctuating phenomenon of pressure and discharge in pipes, which can threaten the safety of hydropower, pumping and water conveyance systems. To analyse the associated problems, new methods with simple form and clear physics are needed. This paper presents a water-hammer reflection coefficient-based criterion for stability evaluation of free-vibration of hydraulic systems
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Hybridizing FDM and FVM scheme of high-precision interface fast capture for mixed free-surface-pressurized flow in large cascade water delivery system J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-08-07 Yifei Huang, Guanghua Guan, Kang Wang, Zhonghao Mao, Zhonghua Yang
In recent years, China has been building several inter-basin water conveyance projects across mountains and deep valleys, leading to the extensive use of long tunnels and inverted siphons. The dynamics of mixed free-surface-pressurized flows are critical for tunnel design and operational safety. However, traditional numerical computation schemes cannot precisely and efficiently capture the pressure
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Investigating the performance of the modified two-component pressure approach in capturing column separation with large vapour cavities J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-08-11 David Khani, Yeo Howe Lim, Ahmad Malekpour
This paper investigates the performance of the modified two-component pressure approach (proposed model), recently proposed by the authors, in capturing column separation with large vapour cavities...
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Effects of tributary floodplain on confluence hydrodynamics J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-08-11 Saiyu Yuan, Guanghui Yan, Hongwu Tang, Yang Xiao, Hamidreza Rahimi, Moe Nandar Aye, Carlo Gualtieri
Confluences are common components of river networks and are characterized by a highly complex flow structure. Two confluence geometries, without and with the floodplain in the tributary, were comparatively investigated to highlight the effects of floodplain on confluence hydrodynamics. The three-dimensional velocity field and the spatial distribution of turbulent kinetic energy and Reynolds shear stresses
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Local scour at abutment under vertical and side suction seepage J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-08-10 Panchali Chakraborty, Abdul K. Barbhuiya
The present laboratory study is done to understand the effect of suction seepage flow on the scour geometry around an abutment placed on non-cohesive bed materials. The experimental data revealed that suction seepage through the channel side and bed affects the scour depth and deposition height. Under the present experimental conditions, it is found that the maximum reduction of scour depth under vertical
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Numerical validation of novel scaling laws for air–water flows including compressibility and heat transfer J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-08-08 Daniele Catucci, Riccardo Briganti, Valentin Heller
Air–water flows are among the most important flow types in hydraulic engineering. Their experimental modelling at reduced size using Froude scaling laws introduces scale effects. This study introduces novel scaling laws for compressible air–water flows in which the air is considered compressible. This is achieved by applying the one-parameter Lie group of point-scaling transformations to the governing
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Stability of mass oscillations in hydropower plants with brook intakes J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-08-07 Livia Pitorac, Kaspar Vereide, Bjørnar Svingen, Leif Lia
The need for more energy storage in the transition to a renewable energy system leads to increasing interest in upgrading existing hydropower plants to pumped storage plants. Such upgrades result in stronger hydraulic transients in the tunnel system, including increased mass oscillation amplitudes. In this study, a generalized tunnel system with multiple brook intakes/surge tanks is analysed to assess
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Scaling laws for two- and three-dimensional wall jet scour based on the phenomenological theory of turbulence J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-08-03 Yesheng Lu, Nian-Sheng Cheng, Maoxing Wei, Aize Luo
The scour induced by wall jets may cause serious bed erosion and thus damage to hydraulic structures. Previous studies are largely empirical, providing only correlations of experimental data. At present, it is not clear what difference exists in the physical mechanisms of two-dimensional (2D) and three-dimensional (3D) wall jet scour. This study first summarizes previous efforts for predicting wall
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Effect of intake pipe blockage on the critical submergence for lateral dual intakes J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-08-03 Muhammed Hashid, T. I. Eldho
This paper presents an experimental study focusing on the effect of intake pipe blockage on the critical submergence of lateral dual square intakes under perpendicular uniform approach flow. The pipe blockage is implemented by various intake protrusions into the approach flow, with one of the intakes always kept flush with the channel sidewall. An increase in protrusion of downstream intake alone causes
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Analytical and experimental study of velocity distribution in adverse-slope channel flow J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-08-02 Yang Xiao, Kang Yuan, Taotao Zhang, Jian Zhou
The prediction of the velocity distribution in adverse-slope flow is improved by analytical and experimental study of the wake and dip effects, based on the log-wake-dip velocity law. This improved equation allows accurate prediction of the wake phenomenon and dip phenomenon. The equation compares very well with the experimental data obtained in the present study and some reference data, and it predicts
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General shallow water equations (GSWEs) J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-07-26 Dubravka Pokrajac
Shallow water equations (SWEs) have been traditionally derived by integrating fundamental flow equations over a flow profile above a single point in a horizontal or nearly horizontal plane, with th...
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Model test based study on icing process of long-distance water channel operating at low temperature environment J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-07-26 Yuguo Wang, Wenyuan Ren, Hongtai Liu, Ruishan Jin, Zhichao Liang, Lisi Niu, Aijun Zhang
The icing problem seriously affects the efficiency of channel water delivery in low temperature conditions. A low-temperature and long-distance channel model test platform was established to study the icing process. Through this model test platform, water temperature and formation of ice cover were tested and discussed. Furthermore, the relationship between border ice width and its influencing factors
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Natural convection due to surface cooling in sloping water bodies with vegetation J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-07-26 Vassilios Papaioannou, Panagiotis Prinos
Natural convection induced by surface cooling in sloping water bodies with vegetation is investigated numerically. The sloping water body consists of a vegetated region with a bottom slope equal to 0.1 and a deep region with a horizontal bottom. The volume-averaged Navier–Stokes equations together with the volume-averaged energy equation are solved numerically in the vegetated region. Submerged vegetation
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On adjustable undular bore profiles based on the modified steady KdV–Burgers equation J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-05-31 Sixue Cheng, Haijiang Liu
In this study, a speed parameter is introduced into the steady Korteweg–de Vries (KdV)–Burgers equation which enables the theoretical undular bore profiles to be adjustable with a proper combination of the speed parameter and the viscous damping parameter. A new criterion for identifying the above two bores is then proposed with respect to these two parameters, whose influence on the undular bore profile
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A curved boundary treatment for discrete Boltzmann model of shallow water flows based on a partially saturated method J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-05-30 Yong Peng, Haichuan Du, Bo Wang
In the present study, a boundary treatment scheme named the partially saturated method (PSM) is incorporated into the discrete Boltzmann model (DBM) for shallow water flows to deal with complex curved boundaries. In this PSM-DBM, the two-dimensional 16 velocity levels scheme is adopted and the finite difference method is used to solve the governing equation. Then, the PSM-DBM has been applied to simulate
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Numerical modelling of levee breach with an improved slope-failure operator J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-05-30 Peng Hu, Aofei Ji, Wei Li, Zhixian Cao
A new slope-failure operator for bank sediment collapsing is proposed and tested. As compared to traditional operators that mainly depend on geometric parameters, the new operator considers the fact that collapsed sediments should firstly enter into the nearby water flow, and whether the collapsed sediments become part of the nearby bed should depend on the local flow and sediment conditions. Both
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Experimental study on flow fields and bubble entrainments by the water droplet impact using 3D PIV tests J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-05-30 Xun Han, Wangru Wei, Pengzhi Lin, Jun Deng, Weilin Xu
The phenomenon of a water droplet impact on a free surface is studied to understand the physics of free surface bubble entrainment. Particle image velocimetry (PIV) and high-speed image system are used to analyse the flow structure evolutions in the droplet impact cavity period and bubble entrainment cavity period, respectively. The photographic results show that the entrapped surface of the impact
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Effects of reconstruction of variables on the accuracy and computational performance of upscaling solutions of the shallow water equations J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-05-25 Alireza Shamkhalchian, Gustavo A. M. De Almeida
This paper presents a new sub-grid flood inundation model obtained by upscaling the shallow water equations (SWE) to enhance the model efficiency in large-scale problems. The model discretizes study domains using two nested meshes. The equations are solved at the coarse mesh by a second-order accurate in space (i.e. piecewise linear reconstruction of variables) Godunov-type finite volume (FV) method
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Failure of rock weirs due to rock dislodgements J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-05-24 Wen Zhang, Ruihua Nie, Bruce W. Melville, Colin N. Whittaker, Asaad Y. Shamseldin, Xingnian Liu, Lu Wang
Rock weirs are low-head river restoration structures. The present study comprised two sets of flume tests (i.e. fixed bed and moveable sand bed tests) to investigate the rock dislodgement process, which is a primary cause of the failure of rock weirs. The impacts of approach flow intensity, submergence, void ratio and scour of bed sediment on rock weir dislodgement, and the responses of sediment bed
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Large eddy simulation of flows past an array of square cylinders J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-05-22 Hongbao Huang, Jianmin Zhang, Jianping Meng
ABSTRACT The flows past an array of square cylinders occur in wide range of applications. To study these flows, we conducted three-dimensional large-eddy simulations for flows past an array of the circular shape formed by multiple smaller square cylinders, where the Reynolds number defined by the array diameter was 1994. We conducted simulations with different solid volume fractions (SVFs) of the square
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Air demand prediction and air duct design optimization method for spillway tunnel By JIJIAN LIAN, XIAOQUN WANG and DONGMING LIU, J. Hydraulic Res., 59(3), 2021, 448–461, https://doi.org/10.1080/00221686.2020.1780499 J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-05-22 Gaetano Crispino, Corrado Gisonni
Published in Journal of Hydraulic Research (Vol. 61, No. 2, 2023)
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Closure to “Air demand prediction and air duct design optimization method for spillway tunnel” J. Hydroaul. Res. (IF 2.3) Pub Date : 2023-05-22 Jijian Lian, Xiaoqun Wang, Dongming Liu
Published in Journal of Hydraulic Research (Vol. 61, No. 2, 2023)