Article
Engineering, Mechanical
Faroogh Garoosi, Andrea Nicole Mellado-Cusicahua, Maryam Shademani, Ahmad Shakibaeinia
Summary: This study experimentally investigates dam-break flow over dry and wet beds to provide current data and deeper insight into the morphology and hydrodynamics of the flood wave. The experiments are conducted in a prismatic channel with a rectangular cross-section, capturing wave profiles, downstream pressure impacts, and water depths at specified locations. The laboratory observations and numerical comparisons show potential for benchmarking CFD tools and understanding complex physics of dam-break wave phenomena.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Engineering, Marine
Tibing Xu, Wenxin Huai, Heping Liu
Summary: A two-phase mesh-free method is used to simulate the propagation of dam-break waves under different wet bed conditions with sediment. The method incorporates the mixture theory and volume fraction for both water and sediments. The pressure Poisson equation is solved to obtain the pressure field for water, and a rheology model is used to calculate the pressure field for sediment. The method is validated through simulations of submerged granular column collapse and dam-break flow over a sediment layer. It accurately reproduces the interface variation between water and sediment. The validated model is then used to simulate dam-break wave propagation in the presence of downstream water and sediment. Different dam-break waves induced by varying upstream water depths are simulated, and it is found that the dam-break waves can cause violent sediment movements. Larger downstream water depths can slow down the sediment movements, while shallower water downstream results in more violent sediment movements.
Article
Engineering, Civil
Alireza Khoshkonesh, Blaise Nsom, Farhad Bahmanpouri, Fariba Ahmadi Dehrashid, Atefeh Adeli
Summary: The paper evaluated the effects of the opening width of a dam site on the evolution of partial dam-break waves. It was found that decreasing the opening width decreases wave front travel distance, outflow discharge values, and Froude number values, while increasing air bubbles entrained within the wave.
WATER RESOURCES MANAGEMENT
(2021)
Article
Chemistry, Multidisciplinary
Thi Thu Hien Le, Van Chien Nguyen
Summary: This paper evaluates the influence of dam gate width and position, as well as initial water depth, on the evolution of rarefaction waves on reservoirs and shock waves over dry flood plain areas. The study uses a numerical model to simulate and analyze the hydraulic characteristics of dam-break flow in 3D. The findings show that a symmetrical dam gate provides a greater peak discharge compared to an asymmetrical case with the same conditions.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Civil
Farhad Bahmanpouri, Mohammad Daliri, Alireza Khoshkonesh, Masoud Montazeri Namin, Mariano Buccino
Summary: This study investigates sediment transport and morphological evolution induced by dam-break flows both experimentally and numerically. The results show that increasing bed compaction rate reduces scouring depth, sedimentation depth, and sediment transport rate, while also increasing wave-front celerity. Additionally, the study highlights the process of air entrainment at the leading edge of the wave-front.
JOURNAL OF HYDROLOGY
(2021)
Article
Geosciences, Multidisciplinary
Zhipan Niu, Chuke Meng, Weilin Xu, Baofeng Di, Yi Long, Hang Yang
Summary: This study simulates the entire process of river blockage and dam break using an innovative flume model, and carries out eight groups of tests under different inflow rates. The process is divided into four stages, and the relationship between Q (in) and Q (max) is analyzed. The study also proposes a new method for model experiments and provides reference for disaster prevention and mitigation in mountainous areas.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Selahattin Kocaman, Stefania Evangelista, Hasan Guzel, Kaan Dal, Ada Yilmaz, Giacomo Viccione
Summary: Dam-break flood waves pose a serious threat to downstream regions. This research conducted 3D numerical simulations of dam-breaks with tailwater to understand the wave propagation dynamics. The comparison between laboratory measurements and numerical results showed a reasonable agreement, with the RANS model performing better.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Marine
Fengjie Zhang, Bo Wang, Yakun Guo
Summary: This study investigates the impact of bottom slope on dam break wave propagation in a triangular wet channel. The results show that the wavefront celerity varies with the slope and water depth ratio. The maximum wave height decreases with the increase of water depth ratio. The arrival time of the maximum wave height categorizes the dam-break wave into two modes, Type A and Type B.
Article
Engineering, Marine
Oguz Simsek, Huseyin Islek
Summary: In this study, dam-break flows on different downstream/upstream water depth ratios and obstacle shapes are modeled using 2D and 3D numerical simulations. The Finite Volume Method is applied for governing equations and the Volume of Fluid method is used for calculating the water-air interfaces. Four turbulence models (RNG, SST, DES, LES) are employed for the simulations. Comparison with experimental results shows that DES is more successful for all depth ratios, while SST performs better for triangular and trapezoidal obstacles. The 3D LES model is found to be more compatible with experimental water surface profiles compared to the other models. Overall, turbulence models considering strain tensor are successful in modeling dam-break propagation waves.
Article
Engineering, Chemical
Anxing Ren, Tianqi Tang, Yurong He
Summary: This study evaluates the flow behaviors and mesoscale structure in fluidized beds with non-spherical dry and wet particles using CFD-DEM simulations, finding the interaction of particle shape and viscous liquid on particle kinetic energy. The results suggest guidance for fluidization of non-spherical particles and optimization of related industrial processes.
ADVANCED POWDER TECHNOLOGY
(2022)
Article
Computer Science, Interdisciplinary Applications
Alibek Issakhov, Aizhan Abylkassymova, Assylbek Issakhov
Summary: This paper presents a three-dimensional model for dam break flows over fixed and movable beds. The model takes into account the transport and deposition of solid particles, as well as the movement of the free surface of water and mud. The model has been shown to be reliable and well balanced, and can accurately capture dam break flow movement in complex terrain. Additionally, the model has been successfully used to simulate a partial dam break scenario.
COMPUTERS AND GEOTECHNICS
(2023)
Article
Water Resources
Xun Jiang, Jie Meng, Bingjie Fan, Chongxu Zhao, Yanshuang Zheng, Qianlu Xiao, Chunjin Zhang, Dongfang Ma
Summary: This study aims to simulate and compare floods generated under various dam-break scenarios and their downstream impacts, using Pingshuijiang Reservoir in southeastern China as an example. The results show significant variation in flood process and submergence due to dam size and failure mode, providing guidance for dam-break flood risk assessment and disaster avoidance planning.
HYDROLOGY RESEARCH
(2023)
Article
Engineering, Marine
Omar S. Areu-Rangel, Jassiel Hernandez-Fontes, Rodolfo Silva, Paulo T. T. Esperanca, Jaime Klapp
Summary: This paper presents a systematic numerical approach to investigate green water loads on a fixed structure using SPH simulation and the wet dam-break method. The study extended from previous research to evaluate more scenarios, study horizontal loads, and analyze the performance of three different plate-type deck edge protections. The results showed that sloped protection was better in reducing maximum horizontal and vertical loads.
Article
Engineering, Multidisciplinary
Alibek Issakhov, Aliya Borsikbayeva, Aizhan Abylkassymova, Assylbek Issakhov, Askar Khikmetov
Summary: In this study, a modified numerical model was developed to simulate the water flow and mud layer transfer during a dam break with different heights. The model was validated and compared with results from 2D and 3D models, and applied to a real complex terrain to assess its effectiveness.
INTERNATIONAL JOURNAL OF NONLINEAR SCIENCES AND NUMERICAL SIMULATION
(2022)
Article
Geosciences, Multidisciplinary
Long Sun, Ranhao Sun, Liding Chen, Tao Sun
Summary: The construction of giant reservoirs can affect soil nutrient recycling, but the effects are often masked by other factors. This study shows that reservoir impoundment does alter soil nutrients, and the hot-dry valleys are an ideal area to study this effect. Soil organic matter, available nitrogen, and available phosphorus are sensitive indicators of the reservoir impoundment effects.
Article
Environmental Sciences
Ehsan Olyaie, Hossein Banejad, Kwok-Wing Chau, Assefa M. Melesse
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2015)
Article
Biochemistry & Molecular Biology
Ali Akbar Safari Sinegani, Niko Nikbakht, Hossein Banejad
CHEMISTRY AND ECOLOGY
(2016)
Article
Geosciences, Multidisciplinary
Hossein Banejad, Hamid Mohebzadeh, Mohammad Hossein Ghobadi, Majid Heydari
JOURNAL OF THE GEOLOGICAL SOCIETY OF INDIA
(2014)
Article
Engineering, Chemical
Ehsan Olyaie, Hossein Banejad, Abbas Afkhami, Alireza Rahmani, Javad Khodaveisi
SEPARATION AND PURIFICATION TECHNOLOGY
(2012)
Article
Engineering, Civil
Ehsan Olyaie, Hossein Banejad, Majid Heydari
IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY-TRANSACTIONS OF CIVIL ENGINEERING
(2019)
Article
Engineering, Civil
Farhad Bahmanpouri, Mohammad Daliri, Alireza Khoshkonesh, Masoud Montazeri Namin, Mariano Buccino
Summary: This study investigates sediment transport and morphological evolution induced by dam-break flows both experimentally and numerically. The results show that increasing bed compaction rate reduces scouring depth, sedimentation depth, and sediment transport rate, while also increasing wave-front celerity. Additionally, the study highlights the process of air entrainment at the leading edge of the wave-front.
JOURNAL OF HYDROLOGY
(2021)
Article
Engineering, Civil
Alireza Khoshkonesh, Blaise Nsom, Farhad Bahmanpouri, Fariba Ahmadi Dehrashid, Atefeh Adeli
Summary: The paper evaluated the effects of the opening width of a dam site on the evolution of partial dam-break waves. It was found that decreasing the opening width decreases wave front travel distance, outflow discharge values, and Froude number values, while increasing air bubbles entrained within the wave.
WATER RESOURCES MANAGEMENT
(2021)
Article
Engineering, Civil
Javad Ahadiyan, Farhad Bahmanpouri, Atefeh Adeli, Carlo Gualtieri, Alireza Khoshkonesh
Summary: This study conducted experiments to investigate the effects of soil properties, rip-rap, and cohesive/non-cohesive soil materials on the breaching process and failure mechanism of levees. The results indicate the crucial role of rip-rap coverage and soil properties in protecting levees from breaching.
WATER RESOURCES MANAGEMENT
(2022)
Article
Environmental Sciences
Payam Heidarian, Seyed Ali Akbar Salehi Neyshabouri, Alireza Khoshkonesh, Farhad Bahmanpouri, Blaise Nsom, Ali Eidi
Summary: The present study investigates the effects of tooth arrangement on eddy currents, kinetic energy dissipation, and turbulence dissipation rate. Unequal tooth angles significantly increase the total turbulence loss, while tooth angle has a larger effect on turbulence loss than bucket radius. The use of unequal tooth angles can significantly increase the loss, and simultaneous use of larger radius and unequal tooth angles further increases the loss.
MODELING EARTH SYSTEMS AND ENVIRONMENT
(2022)
Article
Environmental Sciences
Samira Safari, Atefeh Takarli, Mohammad Salarian, Hossein Banejad, Mohammad Heydari, Hamed Benisi Ghadim
Summary: Broad-crested weirs are important structures used in water flow measurement and control. This study compared different models to estimate spillway discharge coefficient for rectangular broad-crested weirs. The results showed that the Artificial Neural Network (ANN) model performed the best in estimation accuracy.
POLISH JOURNAL OF ENVIRONMENTAL STUDIES
(2022)
Article
Environmental Sciences
Fariba Ahmadi Dehrashid, Majid Heidari, Hamidreza Rahimi, Alireza Khoshkonesh, Saiyu Yuan, Xiaonan Tang, Chunhui Lu, Xiang Wang
Summary: This study investigated the effects of vegetation on flow velocity in a river by using a numerical approach. The results showed that the submergence conditions, arrangement, and density of vegetation significantly influenced the flow velocity.
MODELING EARTH SYSTEMS AND ENVIRONMENT
(2023)
Article
Engineering, Civil
Alireza Khoshkonesh, Seyed Hossein Sadeghi, Saeed Gohari, Somayyeh Karimpour, Shahin Oodi, Silvia Di Francesco
Summary: The study investigated the impact of a drop in a vegetated channel on flow characteristics during dam failure through numerical simulations. Positive drops caused backflow into the reservoir, while even channels without drops experienced backflow due to vegetation drag. The peak discharge occurred at t(peak) = 2.5 s above the drop for all models. Increasing positive drop height reduced the peak discharge, while negative drops had no significant effect. Most cases had a maximum flow velocity of u(m) = 2 m/s. Positive drops reduced the maximum eddy values by Delta omega(max) = 500 1/s, while negative drops increased it by Delta omega(max) = 700 1/s at the middle stage.
WATER RESOURCES MANAGEMENT
(2023)
Article
Water Resources
Nina Solaimani, Ata Amini, Hossein Banejad, Pezhman Taherei Ghazvinei
INTERNATIONAL JOURNAL OF RIVER BASIN MANAGEMENT
(2017)
Article
Engineering, Marine
Alba Ricondo, Laura Cagigal, Beatriz Perez-Diaz, Fernando J. Mendez
Summary: This research presents a site-specific metamodel based on the SWASH numerical model simulations, which can predict coastal hydrodynamic variables in a fast and efficient manner. The metamodel uses downscaled and dimensionality reduced synthetic database to accurately reproduce wave setup, wave heights associated with different frequency bands, and wave runup. This method has great potential in coastal risk assessments, early warning systems, and climate change projections.
Article
Engineering, Marine
Xiao Yu, Wangjun Ren, Bukui Zhou, Li Chen, Xiangyun Xu, Genmao Ren
Summary: This study investigated and compared the compression responses and energy absorption capacities of coral sand and silica sand at a strain rate of approximately 1000 s-1. The results showed that coral sand had significantly higher energy absorption capacity than silica sand due to its higher compressibility. The study findings suggest that using poorly graded coral sand can improve its energy absorption capacity.
Article
Engineering, Marine
Jingxi Zhang, Junmin Mou, Linying Chen, Pengfei Chen, Mengxia Li
Summary: This paper proposes a cooperative control scheme for ship formation tracking based on Model Predictive Control. A predictive observer is designed to estimate the current motion states of the leader ship using delayed motion information. Comparative simulations demonstrate the effectiveness and robustness of the proposed controller.
Article
Engineering, Marine
Yu Yao, Danni Zhong, Qijia Shi, Ji Wu, Jiangxia Li
Summary: This study proposes a 2DH numerical model based on Boussinesq equations to investigate the impact of dredging reef-flat sand on wave characteristics and wave-driven current. The model is verified through wave flume experiments and wave basin experiments, and the influences of incident wave conditions and pit morphological features on wave characteristics are examined.
Article
Engineering, Marine
Jayanta Shounda, Krishnendu Barman, Koustuv Debnath
Summary: This study investigates the double-average turbulence characteristics of combined wave-current flow over a rough bed with different spacing arrangements. The results show that a spacing ratio of p/r=4 offers the highest resistance to the flow, and the double-average Reynolds stress decreases throughout the flow depth. The advection of momentum-flux of normal stress shows an increase at the outer layer and a decrease near the bed region after wave imposition. Maximum turbulence kinetic energy production and diffusion occur at different layers. The turbulence structure is strongly anisotropic at the bottom region and near the outer layer, with a decrease in anisotropy observed with an increase in roughness spacing.
Article
Engineering, Marine
Meng Zhang, Lianghui Sun, Yaoguo Xie
Summary: The research proposes a method for online identification of wave bending and torsional moment in hull structures. For structures without large openings, the method optimizes sensor positions and establishes a mathematical model to improve accuracy. For structures with large openings, a joint dual-section monitoring method is proposed to simultaneously identify bending and torsional moments in multiple key cross sections.
Article
Engineering, Marine
Longming Chen, Shutao Li, Yeqing Chen, Dong Guo, Wanli Wei, Qiushi Yan
Summary: This study investigated the dynamic response characteristics and damage modes of pile wharves subjected to underwater explosions. The results showed that the main damaged components of the pile wharf were the piles, and inclined piles had a higher probability of moderate or more significant damage compared to vertical piles. The study also suggested that replacing inclined piles with alternative optimized structures benefits the blast resistance of pile wharves.
Article
Engineering, Marine
I. -C Kim, G. Ducrozet, V. Leroy, F. Bonnefoy, Y. Perignon, S. Bourguignon
Summary: Previous research focused on the accuracy and efficiency of short-term wave fields in specific prediction zones, while we developed algorithms for continuous wave prediction based on the practical prediction zone and discussed important time factors and strategies to reduce computational costs.
Article
Engineering, Marine
Hang Xie, Xianglin Dai, Fang Liu, Xinyu Liu
Summary: This study investigates the load characteristics of a three-dimensional stern model with pitch angle through a drop test, and reveals complex characteristics of pressure distribution near the stern shaft. The study also shows that the vibration characteristics of the load are influenced by the drop height and pitch angle, with the drop height having a greater effect on the high-frequency components.
Article
Engineering, Marine
Hangyuan Zhang, Wanli Yang, Dewen Liu, Xiaokun Geng, Wangyu Dai, Yuzhi Zhang
Summary: The deep-water bridge is more vulnerable to earthquake damage than the bridge standing in air. The larger blocking ratio has a significant impact on the added mass coefficient, which requires further comprehensive study. The generation mechanism of block effect is analyzed using numerical simulation software ANSYS Fluent. The results show that the recirculation zone with focus reduces the pressure on the back surface of the cylinder, resulting in the peak value of in-line force not occurring synchronously with the peak value of acceleration. The change in position and intensity of the recirculation zone with focus, as well as the change in water flow around the cylinder surface, are identified as the generation mechanism of the block effect, which has a 10% influence on the hydrodynamic force. The changing rule of the added mass coefficient with blocking ratio is discussed in detail, and a modification approach to the current added mass coefficient calculation method is suggested. Physical experiments are conducted to validate the modification approach, and the results show that it is accurate and can be used in further study and real practice.
Article
Engineering, Marine
Golnesa Karimi-Zindashti, Ozgur Kurc
Summary: This study examines the performance of an in-house code utilizing a deterministic vortex method on the rotation of circular and square cylinders. The results show that rotational motion reduces drag forces, suppresses fluctuating forces, and increases lift forces. The code accurately predicts vortex shedding suppression and identifies the emergence of near-field wakes in the flow over rotating square cylinders.
Article
Engineering, Marine
George Dafermos, George Zaraphonitis
Summary: The survivability of damaged ships is of great importance and the regulatory framework is constantly updated. The introduction of the probabilistic damage stability framework has rationalized the assessment procedure. Flooding simulation tools can be used to investigate the dynamic response of damaged ships.
Article
Engineering, Marine
Xuyue Chen, Xu Du, Chengkai Weng, Jin Yang, Deli Gao, Dongyu Su, Gan Wang
Summary: This paper proposes a real-time drilling parameters optimization method for offshore large-scale cluster extended reach drilling based on intelligent optimization algorithm and machine learning. By establishing a ROP model with long short-term memory neurons, and combining genetic algorithm, differential evolution algorithm, and particle swarm algorithm, the method achieves real-time optimization of drilling parameters and significantly improves the ROP.
Article
Engineering, Marine
Sung-Jae Kim, Chungkuk Jin, MooHyun Kim
Summary: This study investigates the dynamic behavior of a moored submerged floating tunnel (SFT) under tsunami-like waves through numerical simulations and sensitivity tests. The results show that design parameters significantly affect the dynamics of the SFT system and mooring tensions, with shorter-duration and higher-elevation tsunamis having a greater impact.
Article
Engineering, Marine
G. Clarindo, C. Guedes Soares
Summary: Environmental contours are constructed using the Inverse-First Order Reliability Method based on return periods. The paper proposes the use of the Burr distribution to model the marginal distribution of long-term significant wave heights. The newly implemented scheme results in different environmental contours compared to the reference approach.
