Article
Engineering, Marine
Ho-Jun Yoo, Hyoseob Kim, Changhwan Jang, Ki-Hyun Kim, Tae-Soon Kang
Summary: The article describes the characteristics of edge waves on a uniform-sloped seabed and their mass transport patterns on the beach, indicating that edge waves have maximum run-up height and run-up distance limits.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Multidisciplinary Sciences
Tatsuya Kubota, Tatsuhiko Saito, Kiwamu Nishida
Summary: On January 15, 2022, the eruption of the Hunga Tonga-Hunga Ha`apai volcano caused tsunamis, with the generation of the tsunami forerunner related to fast-moving atmospheric Lamb waves and subsequent tsunamis related to bathymetric variations in the Pacific Ocean. The tsunamis caused by this volcanic eruption are more complex and longer-lasting than ordinary earthquake-induced tsunamis.
Article
Mechanics
P. l. -F. Liu, P. Higuera, P. H. -Y. Lo
Summary: This paper investigates the generation mechanism of tsunamis caused by a moving atmospheric pressure disturbance. By analyzing the complex wave field generated by the scattering of locked and free waves due to bathymetric variations and coastlines, analytical solutions are obtained using the Fourier transform method. The study reveals the complexity of wave scattering processes and the significant differences between locked and free waves.
Article
Engineering, Civil
Tommaso Attili, Valentin Heller, Savvas Triantafyllou
Summary: The study focused on the impact of landslide-tsunamis on dams, validating wave loading and wave run-up height prediction equations through simulated experiments. New empirical equations were suggested to predict wave run-up height and overtopping volume, while novel insights on dynamic pressure and asymmetrical wave impact angles were provided.
COASTAL ENGINEERING
(2021)
Article
Astronomy & Astrophysics
A. Sagues Carracedo, M. Bulla, U. Feindt, A. Goobar
Summary: The study explores the sensitivity of optical surveys searching for kNe during O3 and proposes ways to optimize filter choices and survey depth for future detection efficiency. It is found that the detection efficiency of kN has a strong dependence on viewing angle, especially for filters blueward of i-band.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Geosciences, Multidisciplinary
Jorge Macias, Cipriano Escalante, Manuel J. Castro
Summary: The study aims to propose a numerical tool benchmarked by NTHMP for assessing landslide-generated tsunami hazards. The Multilayer-HySEA model is validated using laboratory data and applied to granular slides. The results demonstrate the effectiveness of using the multilayer model to deal with tsunamis generated by granular slides.
NATURAL HAZARDS AND EARTH SYSTEM SCIENCES
(2021)
Article
Engineering, Marine
Tongshun Yu, Tingyu Li, Hongda Shi, Zhenyu Zhang, Xingyu Chen
Summary: In this study, an experimental investigation is conducted to understand the complex interaction between a wave and an oscillating buoy, which directly affects the stability, working state, and efficiency of the buoy. The experiment uses wave conditions obtained from measured data on the Qingdao coast, China. The results show the occurrence of wave breaking in front of the buoy when the wave steepness exceeds a certain threshold, and the critical wave steepness decreases with an increase in power take-off (PTO) value. An empirical formula based on wave steepness, PTO value, and wave run-up is proposed to further understand the interaction between waves and buoys.
Article
Astronomy & Astrophysics
Ruisheng Zheng, Yihan Liu, Wenlong Liu, Bing Wang, Zhenyong Hou, Shiwei Feng, Xiangliang Kong, Zhenghua Huang, Hongqiang Song, Hui Tian, Pengfei Chen, Robertus Erdelyi, Yao Chen
Summary: Solar coronal waves, similar to tsunamis on Earth, frequently appear as bright disturbances that propagate globally from the eruption center in the solar atmosphere. Although coronal waves are often observed, their counterparts in the chromosphere are rarely detected. In this study, the coexistence of coronal and Moreton waves in inclined eruptions is presented, suggesting that extreme inclination is the key factor in answering why the chromosphere rarely bears the imprints of solar tsunamis. A proposal for the excitation mechanism of the coronal-Moreton waves in highly inclined eruptions is also provided.
ASTROPHYSICAL JOURNAL LETTERS
(2023)
Article
Engineering, Civil
William Mortimer, Ross Calvert, Alessandro Antonini, Deborah Greaves, Alison Raby, Ton S. van den Bremer
Summary: In this study, we experimentally investigate the implications of second-order wave generation theory on dynamic wave force and run-up on a vertical wall in shallow to intermediate water depth. Short-duration experiments using focused wave groups generated according to first- and second-order theory are compared. Linear, sub-, and super-harmonic contributions are isolated using combinations of inverted wave group time series and filtering. Theoretical predictions for narrow-banded second-order wave groups interacting with a vertical wall are derived and used to calculate depth-integrated force and run-up on the wall, showing close agreement with measured data. Comparisons reveal that sub-harmonic error waves are increasingly important in shallow depth, increasing wave run-up by up to 67% and dynamic force by up to 75% at k0d = 0.6 compared to the case of correct (second-order) generation in a relatively short flume.
COASTAL ENGINEERING
(2023)
Article
Geosciences, Multidisciplinary
Annika O'Dea, Katherine Brodie, Steve Elgar
Summary: This study quantitatively analyzed the shape and evolution of plunging breakers using high spatial and temporal resolution three-dimensional scans of the water surface collected with a multi-beam terrestrial lidar scanner, revealing that void shapes change as breaking progresses and vary under different bottom slope and wind conditions.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Engineering, Environmental
Khawar Rehman, Hammad Khan, Yong-Sik Cho, Seung Ho Hong
Summary: This study uses Artificial Neural Networks and Response Surface Methodology to predict maximum wave run-up heights over submerged breakwaters in coastal areas. Data obtained from laboratory flume experiments show that the ANN model slightly outperforms the RSM model, indicating potential application in developing climate adaptive coastal resilience plans.
STOCHASTIC ENVIRONMENTAL RESEARCH AND RISK ASSESSMENT
(2022)
Article
Economics
Youxing Huang, Qi Xu, Yanping Zhao
Summary: This paper examines the impact of firm's desulfurization investment on productivity in the long and short runs, finding that desulfurization investment largely stimulates productivity in the long term while may have slightly negative impact in the short run. Results suggest that desulfurization investment driven by voluntary regulation is more effective, and market-based incentive regulation is more qualified in the long run.
Article
Environmental Sciences
Puria Asiaban, Colin D. Rennie, Neil Egsgard
Summary: The new technology introduced can generate recreational surf waves on a flat riverbed using an adjustable ramp, transition, and kicker. Numerical experiments show that the ramp slope has minimal effect on the wave profile, while tailwater depth, kicker geometry, and kicker position can significantly enhance and accelerate the wave.
Article
Multidisciplinary Sciences
Manon Robbe-Saule, Cyprien Morize, Yann Bertho, Alban Sauret, Anthony Hildenbrand, Philippe Gondret
Summary: Modeling tsunami waves generated by subaerial landslides is crucial for accurate hazard and risk assessments in coastal areas. Small-scale laboratory experiments show a strong correlation between the amplitude of generated waves and the volume of grains, offering a reliable way to estimate the amplitudes of paleo-tsunamis. Despite differences in scale and geometry, there is a good agreement between experimental laws and field data.
SCIENTIFIC REPORTS
(2021)
Article
Engineering, Ocean
Dede Tarwidi, Sri Redjeki Pudjaprasetya, Didit Adytia
Summary: The goal of this research is to develop an efficient numerical scheme for simulating the appearance of surface waves induced by submarine landslides. The study extends a reduced two-layer non-hydrostatic model to include a time-varying solid bottom. The numerical findings show that the proposed scheme is a feasible alternative for modeling landslide-generated tsunamis, reducing computational effort while maintaining high accuracy.
APPLIED OCEAN RESEARCH
(2022)
Article
Engineering, Ocean
Xueying Yu, Yanlin Shao, David R. Fuhrman
Summary: In this paper, a projection method based Navier-Stokes equations solver is developed, which accurately and efficiently solves the resulting Poisson equation. The fourth-order generalized harmonic polynomial cell (GHPC) method is utilized as the Poisson equation solver. The GHPC method demonstrates the advantage of using stretched non-uniform grids compared to the original HPC method. The immersed-boundary method is employed to deal with fluid-structure interaction problems involving general geometries. The numerical solutions of the 2D Navier-Stokes equations using the GHPC method on non-uniform grids are verified and validated through various flow scenarios, showing good agreement with reference results in the literature.
JOURNAL OF OFFSHORE MECHANICS AND ARCTIC ENGINEERING-TRANSACTIONS OF THE ASME
(2022)
Article
Geochemistry & Geophysics
Andrey Babeyko, Stefano Lorito, Francisco Hernandez, Joern Lauterjungl, Finn Lovholt, Alexander Rudloff, Mathilde Sorensen, Alexey Androsov, Inigo Aniel-Quiroga, Alberto Armigliato, Maria Ana Baptista, Enrico Baglione, Roberto Basili, Joern Behrens, Beatriz Brizuela, Sergio Brunie, M. Didem Cambaz, Juan Cantavella-Nadal, Fernando Carrilho, Ian Chandler, Denis Chang-Seng, Marinos Charalampakis, Lorenzo Cugliari, Clea Denamiel, Gozde Guney Dogan, Gaetano Festa, David Fuhrman, Alice-Agnes Gabriel, Pauline Galea, Steven J. Gibbons, Mauricio Gonzalez, Laura Graziani, Marc-Andre Gutscher, Sven Harig, Helen Hebert, Constantin Ionescu, Fatemeh Jalayer, Nikos Kalligeris, Utku Kanoglu, Piero Lanucara, Jorge Macias Sanchez, Shane Murphy, Ocal Necmioglu, Rachid Omira, Gerassimos A. Papadopoulos, Raphael Paris, Fabrizio Romano, Tiziana Rossetto, Jacopo Selva, Antonio Scala, Roberto Tonini, Konstantinos Trevlopoulos, Ioanna Triantafyllou, Roger Urgeles, Roberto Vallone, Ivica Vilibic, Manuela Volpe, Ahmet C. Yalciner
Summary: The European tsunami community has attained the status of Candidate Thematic Core Service (cTCS) within the European Plate Observing System (EPOS), providing support and a platform for tsunami research and risk management. The cTCS will address the needs in tsunami science and risk mitigation through four thematic pillars.
ANNALS OF GEOPHYSICS
(2022)
Article
Chemistry, Physical
David Furman, Fedor Naumkin, David J. Wales
Summary: This study explores the transformation pathways between fullerene, carbon clusters, and bowl-shaped isomers through calculating and comparing different energy parameters. Infrared spectra are also calculated for experimental identification of clusters and differentiation of isomers. The results suggest that the formation of fullerenes from bowl-shaped isomers will be suppressed at elevated temperatures due to entropic effects, which is of significant importance for the detection of cosmic fullerenes.
JOURNAL OF PHYSICAL CHEMISTRY A
(2022)
Article
Environmental Sciences
Bjarke Eltard Larsen, Mustafa Ali Abdullah Al-Obaidi, Hasan Gokhan Guler, Stefan Carstensen, Koray Deniz Goral, Erik Damgaard Christensen, Nils B. Kerpen, Torsten Schlurmann, David R. Fuhrman
Summary: This paper presents experimental measurements of beaching times for buoyant microplastic particles released in different areas of the beach. The study finds that the microplastics travel onshore with a velocity close to the Lagrangian fluid particle velocity before breaking, and their velocities increase and become closer to the wave celerity in the surf zone. It is also observed that particles with lower Dean numbers are transported at higher mean velocities.
MARINE POLLUTION BULLETIN
(2023)
Article
Engineering, Marine
Karen B. B. Burgaard, Stefan Carstensen, David R. R. Fuhrman, Camille Saurel, Finbarr G. G. O'Neill
Summary: This study provides morphological data and estimates of the settling velocity and drag coefficient of sea stars (Asterias rubens) in Limfjord, Denmark. A geometric model describing the sea star is introduced, and the thickness and arm width are determined as linear functions of arm length. The geometric model accurately predicts the volume and mass of the sea stars, which is in agreement with experimental measurements. The mean sea star density is determined to be 1095 kg/m(3), the mean drag coefficient is estimated to be 2.3, and the settling velocity varies with the square root of its size.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Engineering, Civil
Xueying Yu, Yanlin Shao, David R. Fuhrman, Yunxing Zhang
Summary: A novel two-dimensional numerical wave tank based on the two-phase Navier-Stokes equations is presented in this paper. The GHPC method, originally proposed for the constant-coefficient Poisson equation, is demonstrated to be applicable for two-phase flow problems by introducing a pressure-correction method. The accuracy and convergence rate of the numerical model are validated through wave generation and propagation, as well as comparisons with benchmark results for wave-structure-interaction problems.
COASTAL ENGINEERING
(2023)
Article
Engineering, Civil
Bjarke Eltard Larsen, Dominic A. van der A, Rex Carstensen, Stefan Carstensen, David R. Fuhrman
Summary: Experimental results on shoreface nourishment scenarios are presented, where the effects of nourishment placement and timing on long-term cross-shore profile development are investigated. Four different nourishment scenarios are tested, and the results show that the erosion of the shoreline slows under all scenarios. The two cases with nourishment placed along the bar reduce shoreline erosion more compared to the two cases with nourishment in the trough.
COASTAL ENGINEERING
(2023)
Article
Engineering, Civil
Bjarke Eltard Larsen, David R. Fuhrman
Summary: The study investigates the performance of a recently developed stabilized turbulence closure model in the computational fluid dynamics simulation of cross-shore sediment transport and breaker bar morphology. Comparisons with experiments and simulations using standard turbulence closure show major improvements in predicted breaker bar position and height using the stabilized turbulence model. The study highlights the importance of proper turbulence modeling for accurate CFD prediction of cross-shore sediment transport and profile morphology.
COASTAL ENGINEERING
(2023)
Article
Engineering, Environmental
Koray Deniz Goral, Hasan Gokhan Guler, Bjarke Eltard Larsen, Stefan Carstensen, Erik Damgaard Christensen, Nils B. B. Kerpen, Torsten Schlurmann, David R. R. Fuhrman
Summary: This research demonstrates that the Shields diagram is applicable for predicting incipient motion thresholds of both native sediments and microplastic particles. The study investigates various regular and irregular microplastic particle groups in a flume and combines data from the literature for analysis. A new framework is proposed to account for the effects of static friction, hydraulic roughness, and hiding-exposure on predicting incipient motion conditions for foreign particles, reconciling them with the Shields diagram.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Civil
Titi Sui, B. Mutlu Sumer, V. S. Ozgur Kirca, Stefan Carstensen, Jinhai Zheng, David R. Fuhrman
Summary: This paper presents the results of an experimental investigation on wave-induced liquefaction in the case of multiple wave exposures. The experiments show that the first strongest wave climate leads to liquefaction, regardless of prior wave exposures. It is also found that subsequent wave exposures do not liquefy the soil. Moreover, the dissipation of accumulated pore pressure is slower in uninterrupted wave exposures compared to interrupted ones.
COASTAL ENGINEERING
(2023)
Article
Engineering, Civil
Bjarke Eltard Larsen, David R. Fuhrman
Summary: This paper re-examines empirical formulations for predicting equilibrium scour depths and time scales for monopiles. Based on physical grounds, it argues that dimensionless time scales should scale proportionally to the Shields parameter raised to the -3/2 power. Existing formulations based on laboratory experiments, which have a stronger power dependence, may be unreliable when extrapolated to field scales. The paper re-analyzes existing data sets and develops novel parameterizations that are in line with the proposed argument.
COASTAL ENGINEERING
(2023)
Article
Environmental Sciences
Koray Deniz Goral, Hasan Gokhan Guler, Bjarke Eltard Larsen, Stefan Carstensen, Erik Damgaard Christensen, Nils B. Kerpen, Torsten Schlurmann, David R. Fuhrman
Summary: This study experimentally measured the settling velocities of 66 groups of microplastic particles, including 58 regular and 8 irregular shapes. The study developed novel parameterizations and predictive drag coefficient formulations for both regular and irregular particle shapes, considering preferential settling orientation. The results showed higher accuracy compared to previous predictive formulations. The method for predicting the settling velocity of irregularly-shaped microplastic particles was demonstrated to be applicable to natural sediments in the Appendix.
ENVIRONMENTAL RESEARCH
(2023)
Article
Mechanics
David R. Fuhrman, Mathias Klahn, Yanyan Zhai
Summary: The conventional method for computing the probability density function (p.d.f.) of a nonlinear, irregular water wave field is the approximate Gram-Charlier series solution by Longuet-Higgins. This paper revisits the derivation of the p.d.f. to second order using moment and cumulant generating functions and shows that the approximate solution matches the solution derived from the moment generating function. It is also shown that the approximation employed by Longuet-Higgins is unnecessary and the exact second-order p.d.f. can be represented in terms of the Airy function.
JOURNAL OF FLUID MECHANICS
(2023)
Article
Engineering, Marine
Karen B. Burgaard, Stefan Carstensen, David R. Fuhrman, Bjarke E. Larsen, Finbarr G. O'Neill
Summary: An experimental and numerical study was conducted to investigate the flow behavior upstream and downstream of a disc-attached cylinder near a wall. The experimental results showed that the mean flow could be considered two-dimensional at a distance greater than the diameter of the cylinder. Both the experimental and numerical simulations found an increase in the peak amplitudes of the power spectra of vertical velocity fluctuations at a distance of 3.75 times the diameter from the centerline of the disc, caused by vortices transported by a transverse flow related to the disc.
Article
Fisheries
Karen B. Burgaard, Stefan Carstensen, David R. Fuhrman, Camille Saurel, Finbarr G. O. 'Neill
Summary: This study demonstrates the influence of hydrodynamics on the fishing performance of towed demersal fishing gears. Sea trials in the sea star fishery show that modifications to the gear design can alter the hydrodynamics of the turbulent wake and consequently affect the catching performance of trawl gears. The trials investigate the effect of the gap between the towing beam and the seabed, and the size of the beam on cockle and mussel beds.
FISHERIES RESEARCH
(2023)
Article
Engineering, Civil
Kuifeng Zhao, Yufei Wang, Philip L. -F. Liu
Summary: This note provides guidelines for selecting appropriate analytical periodic water wave solutions based on two physical parameters. The guidelines are summarized in a graphic format and the dividing lines between applicable wave theories are determined by the nonlinearity and frequency dispersion ratios.
COASTAL ENGINEERING
(2024)
Article
Engineering, Civil
Jana Haddad, Johanna H. Rosman, Richard A. Luettich, Christine M. Voss
Summary: Understanding wave transformation in marsh vegetation canopies is crucial for assessing nature-based shoreline strategies. This study investigates the challenges of accurately modeling wave dissipation in coastal marshes and proposes a new dimensionless parameter to represent the canopy drag coefficient (C-D). The study finds that uncertainties in vegetation measurements lead to variations in C-D expressions, and suggests using the Cauchy number (Ca) as the more appropriate parameter for larger waves.
COASTAL ENGINEERING
(2024)
Article
Engineering, Civil
Dirk P. Rijnsdorp, Arnold van Rooijen, Ad Reniers, Marion Tissier, Floris de Wit, Marcel Zijlema
Summary: This paper extends the non-hydrostatic wave-flow model SWASH to account for the influence of a depth-uniform ambient current on wave dynamics. The model's ability is verified by comparing predictions to results from linear theory, laboratory experiments, and a spectral wave model. The extended model accurately captures current-induced changes in the wave field and simulations of wave dynamics in the presence of strong opposing currents.
COASTAL ENGINEERING
(2024)
Article
Engineering, Civil
Zhihao Shen, Duruo Huang, Gang Wang, Feng Jin
Summary: In this study, a resolved CFD-DEM coupling procedure was proposed to study the interaction of waves and irregularly shaped armour units. The model was validated by comparing the numerical results with a flume wave erosion test. The influence of armour shape on overtopping discharge, pressure distribution, and vortex structure was also studied.
COASTAL ENGINEERING
(2024)
Article
Engineering, Civil
Xinyu Hou, Zhonghua Weng, Xin Chen, Gengfa Chen
Summary: A single-phase model is proposed to predict sediment motion on vortex rippled bed under wave action. The model takes into account the acceleration effect of bottom sediment, the development of asymmetric boundary layer, and the sediment phase-lag, and successfully predicts the velocity, concentration, and development of sediment cloud on vortex ripples.
COASTAL ENGINEERING
(2024)
Article
Engineering, Civil
Mark Loveland, Eirik Valseth, Jessica Meixner, Clint Dawson
Summary: This article discusses the importance of using numerical models to predict the wind wave spectrum of the ocean. The article explores various finite element discretizations of the Wave Action Balance Equation and examines their convergence properties through simplified 2-D test cases. It also introduces a new spectral wind wave model called WAVEx and its implementation method.
COASTAL ENGINEERING
(2024)
Article
Engineering, Civil
Yuan Li, Chi Zhang, Shaohua Zhao, Hongshuai Qi, Feng Cai, Jinhai Zheng
Summary: Sandy-muddy transitional beaches (SMT-Beaches) are a type of coastal formation consisting of upper sandy beach and lower mudflat. This study examined the morphological characteristics of SMT-Beaches and the mechanisms of the formation of sandmud transition (SMT) boundary. Field surveys were conducted on SMT-Beaches in South China Coasts and a new equilibrium profile function for SMT-Beaches was developed. The function demonstrated good performance and improved accuracy compared to traditional methods. It was also found that sediment characteristics differ on both sides of the SMT boundary, with clay-to-silt grains increasing seaward.
COASTAL ENGINEERING
(2024)
Article
Engineering, Civil
He Ma, Ludi Xu, Samuel Ukpong Okon, Peng Hu, Wei Li, Huabin Shi, Zhiguo He
Summary: This study presents a coupled model to predict morphodynamic changes during storm surges. The model accurately simulates the morphological evolution of the Santa Rosa barrier island caused by Hurricane Ivan's storm surge.
COASTAL ENGINEERING
(2024)
Article
Engineering, Civil
Myung Jin Koh, Hyoungsu Park, Albert S. Kim
Summary: A framework combining tsunami flow model and debris transport model is developed to evaluate the kinematics of multiple debris and sequential hazards in a coastal community. The impact of tsunami-driven debris at Honolulu Harbor, Hawaii is assessed by simulating the motion of 2500 shipping containers under a hypothetical tsunami event. New types of intensity measures for tsunami-driven debris hazards are introduced, and hazard maps showing the potential impact loadings from debris dispersion are presented.
COASTAL ENGINEERING
(2024)
