Article
Mechanics
Zhi Fu Li, Guo Xiong Wu, Kang Ren
Summary: This study examines wave radiation and diffraction problems of a body floating in an open water channel confined by two semi-infinite ice sheets. It uses linearized velocity potential theory for fluid flow and a thin elastic plate model for the ice sheet. By deriving the Green function and boundary integral equation, the research shows that the problem can be solved by discretizing the body surface, and offers detailed results on hydrodynamic forces and wave interactions in the channel.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Mathematics, Applied
Sovanna Mean, Koichi Unami, Hisashi Okamoto, Masayuki Fujihara
Summary: This study investigates determining water surface profiles of steady open channel flows, using the concept of viscosity solutions to describe characteristics of possibly non-smooth and discontinuous solutions, achieving conservation of momentum and the entropy condition. Generalized solutions to some Dirichlet problems are not always unique.
APPLIED MATHEMATICS AND COMPUTATION
(2022)
Article
Environmental Sciences
Wei Huang, Yufang Ni, Maggie Creed, Sihan Yu
Summary: Floating dikes have advantages over spur dikes as they have less impact on riverine sediment transport, bed topography, and ecosystems, and are more adaptable to fluvial conditions. However, the limited understanding of the 3D flow structures around floating dikes has hindered their widespread use. Experimental results show that installing a floating dike deflects surface water flow and creates a backflow around the dike, with significant turbulence and Reynolds stress. The cross-sectional area decreases due to the blocking effect of the dike, leading to increased velocities below and alongside the dike.
Article
Materials Science, Ceramics
Yu Zheng, Xudong Luo, Jiegang You, Ting Li, Qingdong Hou
Summary: This study presents a method for preparing ceramic foams with open pores through gelation, resulting in hierarchical porous microstructure and high specific surface area, suitable for applications in adsorption and gas filtration.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Environmental Sciences
Wei Zeng, Chao Wang, Jiandong Yang
Summary: This paper presents a coupling method using the method of characteristics (MOC) and finite volume method (FVM) for hydraulic transient analysis in systems with both pipelines and open channels. The method allows for parameter transmission between the MOC and FVM regions through coupling boundaries, and has been validated to provide more reliable and accurate results compared to traditional methods.
Article
Environmental Sciences
Hasan Zobeyer, Abul B. M. Baki, Saika Nowshin Nowrin
Summary: This study presents experimental results on the mean and turbulence characteristics of flow generated by a pair of cylinders placed in tandem in an open-channel flume, using an acoustic Doppler velocimeter (ADV) to measure the instantaneous three-dimensional velocity components. The downstream cylinder significantly influences the flow development between cylinders, with turbulent peak generally occurring near the end of the recirculation zone in all scenarios.
Article
Physics, Fluids & Plasmas
Mrinmoy Dhar, Gargi Das, Prasanta Kumar Das
Summary: This study investigates planar hydraulic jump in narrow rectangular conduits at small inclinations, considering both upslope and downslope flows resulting from viscous shear without geometrical obstruction. The effects of increasing conduit tilt and flow rate on the hydrodynamic states are explored, with additional complexities observed near the conduit ceiling. A phase diagram is developed to identify the natural jump regime and multiple hydrodynamic states for certain operating conditions. The experimental and theoretical analyses show close agreement, revealing jump-induced hysteretic flow in sloping conduits.
PHYSICAL REVIEW FLUIDS
(2021)
Article
Engineering, Geological
Yu-Wei Hwang, Shideh Dashti
Summary: This study systematically investigates the impact of multiple buildings interactions on engineering demand parameters, showing that the interactions have adverse effects on certain parameters, especially in specific cluster configurations.
JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING
(2023)
Article
Environmental Sciences
P. J. Southard, J. P. L. Johnson, D. M. Rempe, A. M. Matheny
Summary: The spatial distribution of vegetation significantly influences the morphology and flow velocity of alluvial channels, with bed and bank vegetation playing key roles in width and depth adjustments.
WATER RESOURCES RESEARCH
(2022)
Review
Chemistry, Multidisciplinary
Yanze Wei, Decai Zhao, Jiawei Wan, Dan Wang
Summary: This review investigates the influence of interactions among electron-orbital-lattice on the physicochemical properties of hollow multishelled structures (HoMSs) and uncovers performance enhancements from an atomic perspective.
TRENDS IN CHEMISTRY
(2022)
Article
Mechanics
Jianyu Wang, Guojian He, Subhasish Dey, Hongwei Fang
Summary: This study investigated the interaction between flow and submerged flexible vegetation through numerical simulation, revealing the formation of alternate vortices at the flow-vegetation interface, resulting in wave-like oscillations of the vegetation canopy. The study also demonstrated the effects of flow velocity, vegetation spacing, and relative density on the characteristics of vegetation oscillations.
JOURNAL OF FLUID MECHANICS
(2022)
Article
Mechanics
Jianyu Wang, Guojian He, Subhasish Dey, Hongwei Fang
Summary: This study presents a three-dimensional numerical model for the interaction of flow with submerged flexible vegetation, successfully simulating the interaction between flow and highly flexible vegetation. Experimental results validate the effectiveness of the numerical model in simulating velocity profiles and vegetation movement induced by flow.
JOURNAL OF FLUID MECHANICS
(2022)
Article
Environmental Sciences
Cheng Zeng, Yimo Bai, Jie Zhou, Fei Qiu, Shaowei Ding, Yudie Hu, Lingling Wang
Summary: Floodplain vegetation plays a crucial role in the velocity distribution and turbulent coherent structure of compound open channel flows. This study conducted wall-modeled large eddy simulation (WMLES) to investigate the effects of floodplain vegetation density on the flow field and turbulent structure. The results showed that floodplain vegetation increased the streamwise velocity in the main channel, enhanced transverse momentum exchange, and concentrated strip structures near the junction area of compound open channel flows.
Article
Environmental Sciences
Gonzalo Garcia-Alen, Olalla Garcia-Fonte, Luis Cea, Luis Pena, Jeronimo Puertas
Summary: The study utilized 2D models based on the shallow water equations for simulating flow through weirs and presented an experimental dataset consisting of 194 experiments. A comparison between the experimental data and numerical results was conducted to quantify discrepancies due to non-fulfillment of the hydrostatic pressure hypotheses. The experimental dataset provided can be valuable for validating other modeling approaches.
Article
Multidisciplinary Sciences
Anastasiia Sukalskaia, Monique S. Straub, Dawid Deneka, Marta Sawicka, Raimund Dutzler
Summary: The structures of human TTYH1-3 determined by cryo-electron microscopy do not display features of an anion channel, instead suggesting an interaction with lipid-like compounds in the membrane. This indicates a potential involvement of TTYH proteins in lipid-associated processes.
NATURE COMMUNICATIONS
(2021)
Article
Environmental Sciences
Mattia Pivato, Luca Carniello, Daniele Pietro Viero, Chiara Soranzo, Andrea Defina, Sonia Silvestri
Article
Water Resources
Riccardo A. Mel, Daniele P. Viero, Luca Carniello, Luigi D'Alpaos
JOURNAL OF HYDROLOGY-REGIONAL STUDIES
(2020)
Article
Engineering, Civil
Alessia Ferrari, Daniele P. Viero
JOURNAL OF HYDROLOGY
(2020)
Article
Marine & Freshwater Biology
Riccardo A. Mel, Daniele P. Viero, Luca Carniello, Andrea Defina, Luigi D'Alpaos
Summary: The closure of the Venice Lagoon in October 2020 for the first time in history due to the Mo.S.E. system's operation not only prevented flooding but also led to unprecedented hydrodynamic scenarios. The closure facilitated a better understanding of wind effects on tide propagation, as well as the evaluation of gate operations' impact on seaward disturbance and infiltration into the lagoon.
ESTUARINE COASTAL AND SHELF SCIENCE
(2021)
Article
Engineering, Civil
Tommaso Lazzarin, Daniele P. Viero, Daniela Molinari, Francesco Ballio, Andrea Defina
Summary: In this paper, a physics-based method for assessing flood damage is proposed. A non-dimensional impact parameter is introduced to combine water depth and flow velocity, which allows for evaluating relative damage functions for items of different nature. This method provides an understandable assessment of flood hazard even with limited data.
JOURNAL OF HYDROLOGY
(2022)
Article
Multidisciplinary Sciences
Davide Tognin, Alvise Finotello, Andrea D'Alpaos, Daniele P. Viero, Mattia Pivato, Riccardo A. Mel, Andrea Defina, Enrico Bertuzzo, Marco Marani, Luca Carniello
Summary: Coastal flooding prevention measures, such as storm-surge barriers, are widely adopted globally due to rising sea levels. However, their effects on shallow tidal embayment morphodynamics are poorly understood. Field data and modeling results from the microtidal Venice Lagoon reveal that artificial reduction of water levels leads to increased sediment resuspension and decreased salt marsh accretion.
Article
Water Resources
Tommaso Lazzarin, Daniele P. Viero
Summary: In this study, helical flow secondary currents are included in a two-dimensional depth-averaged hydro-morphodynamic model to analyze the flow field and bed evolution near bends. Different methods are compared in terms of their impact on the flow field and bed evolution using data from laboratory experiments and real-world case studies. The study also discusses key factors in secondary flow modeling, such as implementation tricks and mesh design guidelines.
ADVANCES IN WATER RESOURCES
(2023)
Article
Geosciences, Multidisciplinary
A. Ielpi, D. P. Viero, M. G. A. Lapotre, A. Graham, M. Ghinassi, A. Finotello
Summary: River meandering controls the age of floodplains through the formation of oxbows, while the spacing and timescales of bend evolution and abandonment can be used to constrain the distribution of floodplain ages and sediment-storage time. This approach applies to both natural and simulated rivers, suggesting its potential applicability to unconfined meandering rivers in other locations. However, further testing with independent geo- or dendrochronological data is required.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Engineering, Civil
Tommaso Lazzarin, Daniele P. Viero, Daniela Molinari, Francesco Ballio, Andrea Defina
Summary: Commonly adopted procedures for flood damage assessment have limitations in describing the time evolution of hazard and exposure during the flood event. This study proposes a new framework that considers how flood damage evolves in time, showing potential for flood risk assessment and management.
JOURNAL OF HYDROLOGY
(2022)
Article
Mechanics
Tommaso Lazzarin, Daniele Pietro Viero, Andrea Defina, Luca Cozzolino
Summary: The present paper focuses on two unresolved issues in the free orifice flow under vertical sluice gates: flow stability at large gate openings and the determination of multiple solutions in the case of partial dam-break. Through laboratory experiments and numerical simulations, utilizing a computational fluid dynamics model with the volume of fluid method, these interconnected problems are investigated. A series of quasi-steady states is utilized to determine the threshold of relative gate openings for the transition from orifice flow to non-interacting flow. Furthermore, dam-break experiments with partial gate opening are conducted to establish reliable criteria for disambiguating multiple exact solutions provided by the one-dimensional shallow water theory.
Article
Mechanics
Daniele Pietro Viero, Tommaso Lazzarin, Paolo Peruzzo, Andrea Defina
Summary: The study proposes and discusses a theoretical approach to predict the behavior of open-channel supercritical flow passing over a non-orthogonal step. A sequence of oblique shock waves and expansion fans is generated near and downstream of the step. The proposed model is validated by comparing with a numerical model. Applications include using oblique steps and abrupt wall deflections to control wave fronts in channel bends. Special attention is given to the transition from supercritical to subcritical flow over a forward-facing step, which exhibits complex solutions and hysteresis effects. The theoretical and numerical models determine the existence and hysteresis domains of different flow configurations.
Article
Environmental Sciences
T. Lazzarin, G. Constantinescu, L. Di Micco, H. Wu, F. Lavignani, M. Lo Brutto, D. Termini, D. P. Viero
Summary: The present study investigates the impact of bed roughness on flow and turbulence structure around an isolated, partially-buried mussel. The results show that increasing bed roughness amplifies turbulence kinetic energy in the near-wake region and weakens the strength of the main downwelling flow.
WATER RESOURCES RESEARCH
(2023)
Article
Geosciences, Multidisciplinary
Tommaso Lazzarin, Andrea Defina, Daniele Pietro Viero
Summary: The present work aims to assess the change in flood risk over time due to landscape modifications. The town of San Dona di Piave (Italy) is used as a case study, as it has experienced significant urbanization and anthropization in recent decades, similar to other floodplains in Northern Italy. Flood damage to residential buildings is used as a proxy for flood risk. The analysis is conducted at a local scale, considering changes to individual buildings, and utilizes GIS data such as high-resolution topography, technical maps, and aerial images to track the evolution of the landscape in terms of urbanized areas and hydraulic structures. A physics-based hydrodynamic model is used to determine flood hazard, while an innovative method is employed to estimate the expected flood damage to residential buildings. The findings demonstrate the detrimental effect of urbanization on flood risk, with the risk increasing in proportion to the extent of urbanized areas. The study also highlights the time evolution of flood damage within individual flood events, reflecting changes in the flooding process. Overall, this research offers a promising technique for analyzing the effects of past landscape changes on flood risk, and provides a valuable tool for informed and sustainable land planning.