Article
Engineering, Civil
Wenjun Liu, Bo Wang, Yakun Guo, Wei Wang, Jun Deng
Summary: This paper investigates the flow characteristics of flood in the compound channel using laboratory experiments and numerical simulation. The study finds that the overflowing water from the main channel quickly forms reverse flow after hitting the floodplain sidewall, enhancing the bed shear stress on the floodplain. Unsteady transverse transport during flooding inhibits the formation of coherent eddies, resulting in complex multi-vortex structures on the floodplain.
JOURNAL OF HYDROLOGY
(2023)
Article
Engineering, Civil
Suresh Modalavalasa, Vinay Chembolu, Subashisa Dutta, Vinayak Kulkarni
Summary: The presence of floodplain vegetation can enhance streamwise velocities in a meandering channel. The velocity gradient and turbulent structures at the channel-floodplain interface are influenced by the density of vegetation.
JOURNAL OF HYDROLOGY
(2023)
Article
Computer Science, Interdisciplinary Applications
Nikita Kruk, Jose A. Carrillo, Heinz Koeppl
Summary: The continuum description of active particle systems is a useful tool for analyzing the dynamics of a large number of particles, but the equations often appear as complex nonlinear integro-differential equations. This paper proposes a general framework of finite volume methods to numerically solve partial differential equations of chiral active particle systems, demonstrating the method's performance on both spatially homogeneous and inhomogeneous problems. The study investigates phase transitions of specific problems in both spatially homogeneous and inhomogeneous regimes, reporting the existence of different first and second order transitions.
JOURNAL OF COMPUTATIONAL PHYSICS
(2021)
Article
Environmental Sciences
Chang He, Zhen-Yu Yin, Alessandro Stocchino, Onyx Wing Hong Wai
Summary: This study numerically investigates the flow structure and mechanism of macro-vortex generation in estuarine compound channels. It is found that the velocity magnitude in channels is significantly larger than in floodplains, resulting in a high-velocity gradient at the depth discontinuity. The distribution of macro-vortices is closely related to high vorticity regions.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Engineering, Ocean
Guanyu Zhang, Weiwen Zhao, Decheng Wan
Summary: The paper utilizes the partitioned MPS-FEM method to simulate free surface flow interacting with deformable structures. Through validation tests and extension to three-dimensional models, the method's effectiveness and stability in simulating FSI phenomena are confirmed.
APPLIED OCEAN RESEARCH
(2021)
Article
Engineering, Civil
Prateek Kumar Singh, Xiaonan Tang, Yutong Guan, Hamidreza Rahimi
Summary: A new model is proposed in this paper to calculate the percentage shear force carried by floodplains, which is simple and accurate and suitable for a wide range of applications.
JOURNAL OF HYDROLOGY
(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
Mathematics
Mubashir Qayyum, Imbsat Oscar
Summary: A new modification of the homotopy perturbation method, called the least square homotopy perturbation method (LSHPM), is introduced in this study for solving various order boundary value problems. The LSHPM is tested against linear and nonlinear differential equations of second to seventh order, showing its effectiveness and consistency for complex BVPs in science and engineering. The results obtained from LSHPM are compared with those from other numerical schemes as well as the traditional HPM, confirming the efficiency of the proposed scheme.
JOURNAL OF MATHEMATICS
(2021)
Article
Engineering, Civil
Feng Wu, Dongwei Huang, Xiaoming Xu, Ke Zhao, Ning Zhou
Summary: In this study, an efficient calculation scheme is proposed to obtain the statistical moments based on high-order stochastic perturbation (SP) expansion. The scheme involves using the divided-difference method to approximate the partial derivative items and an adaptive method to ignore insignificant expansion items. The proposed method is compared with other methods and shows high efficiency and improved accuracy of statistical moments.
Article
Mechanics
Omer M. M. Babiker, Ivar Bjerkebaek, Anqing Xuan, Lian Shen, Simen A. Ellingsen
Summary: Through the study of direct numerical simulation (DNS) data, it is found that the imprints of surface-attached vortices can be effectively distinguished from other turbulent surface features based on their circular shape and longer persistence. A computer vision procedure is developed to detect and track vortices solely based on their surface features, with a sensitivity and accuracy of 90% or better. The relationship between the number of surface dimples and the mean-square surface divergence suggests that visible free-surface dimples can be used as a proxy to remotely estimate the rate of mass flux across the surface in some natural flows.
JOURNAL OF FLUID MECHANICS
(2023)
Article
Computer Science, Interdisciplinary Applications
Alberto Vela-Martin, Miguel P. Encinar, Adrian Garcia-Gutierrez, Javier Jimenez
Summary: Wall-bounded flows are crucial in numerous applications and have been extensively studied, but the dynamics of logarithmic and outer regions remain controversial. This study presents a low-storage method for time-resolved databases, utilizing filtered flow fields to reduce storage costs. By relaxing numerical resolution and leveraging GPU co-processors with a high-resolution hybrid CUDA-MPI code, significant speed-up in computing is achieved to capture large-scale dynamics effectively.
JOURNAL OF COMPUTATIONAL SCIENCE
(2021)
Review
Chemistry, Physical
Ryoichi Yamamoto, John J. Molina, Yasuya Nakayama
Summary: The presented method efficiently calculates the motions of hydrodynamically interacting particles in various host fluids by coupling continuum fluid mechanics with moving particles. By modeling the interface between solid particles and host fluid as a thin shell region, the method achieves high accuracy and versatility.
Article
Multidisciplinary Sciences
C. Zu, F. Machado, B. Ye, S. Choi, B. Kobrin, T. Mittiga, S. Hsieh, P. Bhattacharyya, M. Markham, D. Twitchen, A. Jarmola, D. Budker, C. R. Laumann, J. E. Moore, N. Y. Yao
Summary: The study demonstrates direct control over the emergent spin diffusion coefficient by tuning the underlying parameters within the spin Hamiltonian. It investigates the emergence of classical properties of a solid from its underlying microscopic quantum description through a hybrid solid-state platform.
Article
Engineering, Civil
Jiao Zhang, Wen Wang, Haoran Shi, Wei-Jie Wang, Zhanbin Li, Zhaohui Xia
Summary: This study investigated longitudinal velocity profiles in a channel partially covered with novel artificial vegetation using experimental and theoretical methods. Experimental data showed a two-zone flow structure due to discontinuity of drag force from artificial vegetation, with a dominant vortex at the interface causing lateral transport of momentum and mass. The study developed a vortex-based model for predicting lateral distribution of the longitudinal velocity, with consistent predicted and measured velocities within a relative error of 4%-6%.
JOURNAL OF HYDROLOGY
(2021)
Article
Multidisciplinary Sciences
Linus Engelmann, Josef Hasslberger, Seung-Jin Baik, Markus Klein, Andreas Kempf
Summary: A new benchmark case is presented in this study to evaluate models and methods for direct numerical simulation (DNS) and large-eddy simulation (LES). The Taylor-Green vortex is modified by adding walls and a passive scalar to mimic heat transfer. The case provides clean boundary and initial conditions, making it suitable for assessing LES modeling strategies. The results show that the proposed case features challenging flow dynamics not covered by the default Taylor-Green vortex, justifying its usefulness as a benchmark.
SCIENTIFIC REPORTS
(2023)
Article
Oceanography
Wen L. Chen, Pieter C. Roos, Henk M. Schuttelaars, Suzanne J. M. H. Hulscher
Article
Oceanography
Mohit Kumar, Henk M. Schuttelaars, Pieter C. Roos, Matthias Moller
Article
Oceanography
Pieter C. Roos, Henk M. Schuttelaars
Article
Environmental Sciences
Andries J. Paarlberg, Massimo Guerrero, Fredrik Huthoff, Mariano Re
Article
Environmental Sciences
Nicholas Pinter, Fredrik Huthoff, Jennifer Dierauer, Jonathan W. F. Remo, Amanda Damptz
ENVIRONMENTAL SCIENCE & POLICY
(2016)
Article
Engineering, Civil
Remco Steenstra, Bas Hofland, Alfons Smale, Andries Paarlberg, Fredrik Huthoff, Wim Uijttewaal
JOURNAL OF HYDRAULIC ENGINEERING
(2016)
Article
Oceanography
Changyu Li, Henk M. Schuttelaars, Pieter C. Roos, Johan H. Damveld, Wenping Gong, Suzanne J. M. H. Hulscher
OCEAN & COASTAL MANAGEMENT
(2016)
Article
Oceanography
Wen L. Chen, Pieter C. Roos, Henk M. Schuttelaars, Mohit Kumar, Tjerk J. Zitman, Suzanne J. M. H. Hulscher
Article
Engineering, Civil
Remco Steenstra, Bas Hofland, Alfons Smale, Andries Paarlberg, Fredrik Huthoff, Wim Uijttewaal
JOURNAL OF HYDRAULIC ENGINEERING
(2016)
Article
Environmental Sciences
F. Huthoff, J. W. F. Remo, N. Pinter
JOURNAL OF FLOOD RISK MANAGEMENT
(2015)
Article
Environmental Sciences
Matthijs R. A. Gensen, Jord J. Warmink, Fredrik Huthoff, Suzanne J. M. H. Hulscher
Article
Environmental Sciences
Matthijs R. A. Gensen, Jord J. Warmink, Fredrik Huthoff, Suzanne J. M. H. Hulscher
Summary: This article evaluates the impact of interventions on system-wide water levels in bifurcating rivers, finding that a single intervention may lead to unwanted water level increases downstream. A second intervention is needed to balance this effect at the bifurcation, but water level increases may still occur at other discharges. Additionally, while interventions may reduce local water level uncertainty, uncertainty in discharge distribution remains, implying that flooding probabilities cannot be reduced throughout the entire river system by interventions in upstream reaches.
JOURNAL OF FLOOD RISK MANAGEMENT
(2022)
Article
Engineering, Marine
Pieter C. Roos, Giordano Lipari, Chris Pitzalis, Koen R. G. Reef, Gerhardus H. P. Campmans, Suzanne J. M. H. Hulscher
Summary: This study investigates the implications of applying Lorentz's energy criterion to time-varying shallow flows, showing that this method accurately captures both qualitative and quantitative aspects of surge dynamics, specifically in capturing surge peaks, sloshing, and friction-induced tide-surge interactions under various wind forcings, both synthetic and realistic.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2021)
Article
Engineering, Marine
G. H. P. Campmans, Thaienne A. G. P. van Dijk, Pieter C. Roos, Suzanne J. M. H. Hulscher
Summary: This study calibrates and validates sand wave models using field data from the North Sea, finding satisfactory agreement between observed and modeled sand wave lengths and a systematic overprediction of sand wave heights by nonlinear models.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Review
Environmental Studies
Walter Leal Filho, Cagdas Dedeoglu, Maria Alzira Pimenta Dinis, Amanda Lange Salvia, Jelena Barbir, Viktoria Voronova, Ismaila Rimi Abubakar, Arvo Iital, Karin Pachel, Fredrik Huthoff, Ayyoob Sharifi, Peter J. Yang, Maris Klavins, Victoria Omeche Emanche
Summary: Rivers are important ecosystems for both human livelihoods and other species. However, current use of rivers is unsustainable due to solid waste and high levels of pollutants, with plastic pollution being a major concern. This study explores the pressures and trends related to riverine plastic pollution in Asia, highlighting the significance of the problem and the gaps in regulations and standards. It also presents specific measures to reduce levels of riverine plastic pollution, offering new insights on the topic.
