Article
Engineering, Marine
Chun-Yuan Lin, Ching-Jer Huang, Tai-Wen Hsu
Summary: The proposed numerical model effectively simulates the viscous flow field near seawalls and reveals the impact of different types of seawalls on waves and bottom soil, providing valuable insights for coastal engineering design.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Engineering, Marine
Maarten van Ormondt, Dano Roelvink, Ap van Dongeren
Summary: A new set of empirical formulations has been derived to predict wave run-up at naturally sloping sandy beaches, based on fitting results of XBeach-NH+ model simulations. The formulations include reduction coefficients for incident wave angle and directional spreading effects, and show better predictive skills than widely used Stockdon relationships. The study also highlights the importance of surf zone slope in predicting wave run-up and the relationship between infragravity run-up and beach slope.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2021)
Article
Engineering, Civil
Yun-Ta Wu, Pablo Higuera, Philip L-F Liu
Summary: This paper investigates the runup of a train of successive solitary waves through experiments and numerical simulations. It categorizes the runup characteristics of successive solitary waves into weakly interacting and strongly interacting cases based on the nonlinearity parameter. The study finds that the unified empirical runup formula for single breaking solitary waves and breaking periodic waves can be applicable to obtain the maximum runup height of successive solitary waves.
COASTAL ENGINEERING
(2021)
Article
Environmental Sciences
Bin Deng, Wen Zhang, Yu Yao, Changbo Jiang
Summary: This study investigates the hydrodynamics of bore-driven swash flows over beaches with varying slopes through laboratory experiments. The impacts of beach slope on swash hydrodynamics and the formation and evolution of vortex structures are analyzed.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Mechanics
Yi Han Toh, Bing Feng Ng
Summary: A novel approach incorporating bifurcation theory and rotation turbulence energy spectrum is implemented to enhance the sensitivity of the k - epsilon turbulence model to curved surfaces, taking into account the significance of vorticity in curved flows. By demonstrating the approach on various test cases, the new eddy viscosity model provides better turbulence predictions along convex or concave surfaces and is closer to experimental results.
Article
Engineering, Marine
Chun-Cheng Chang, Yun-Ta Wu
Summary: In this study, the effect of different macro-roughness slopes on dam-break driven swash was evaluated using an open-source particle-based program, Dual-SPHysics. The simulations showed that different configurations of slope roughness have varying effects on the flow hydrodynamics in the swash zone, contributing to the understanding of long wave kinematics and hydrodynamics in nearshore zones.
Article
Engineering, Marine
Mariano Buccino, Angela Di Leo, Sara Tuozzo, Luis F. Cordova Lopez, Mario Calabrese, Fabio Dentale
Summary: This research investigates wave overtopping of a vertical seawall in an uneven surf zone using physical and numerical experiments. The results show that the CFD-RANS model is accurately in line with laboratory measurements, while the SWASH model overestimates certain measurements and underpredicts the overtopping rate. The analysis of laboratory and numerical data indicates that the overtopping rate is dependent on the high percentiles of the wave elevation distribution, rather than the wave spectrum shape.
Article
Engineering, Marine
Florin Pacuraru, Andreea Mandru, Adham Bekhit
Summary: The present study investigates the effects of different hull features on the hydrodynamic performance of a high-speed planing hull. Computational Fluid Dynamics (CFD) simulation is used to accurately predict the total drag and trim angle, and it is found that optimizing the hull shape and whisker configuration can reduce the total drag by up to 9%.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Environmental Sciences
Jost Kemper, Ulf Riebesell, Kai Graf
Summary: The direct effects of artificial upwelling (AU) on nutrient spread and concentration in the ocean's mixed surface layer are studied, and the new simulation method is found to capture the expected flow phenomena well. Comparative studies of design variants are presented and analyzed to maximize the retention of nutrients in the mixed surface layer.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Mechanics
Manolia Andredaki, Anastasios Georgoulas, Nicolas Miche, Marco Marengo
Summary: In this study, an enhanced Volume of Fluid model is used for parametric numerical simulations to investigate breakup phenomena of accelerating, elongated vapor bubbles in circular mini-channels. The effect of fundamental controlling parameters on breakup characteristics is examined, leading to the identification of three prevailing regimes: full breakup, partial breakup, and no breakup. The results are consolidated into a well-defined flow map based on the We and Fr* numbers.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2021)
Article
Engineering, Marine
Hezhen Fang, Zhichao Chen, Chen Chen, Shuai Sun, Xiuyu Wang, Dazhuan Wu, Shijie Qin
Summary: The air cavity planing hull reduces wetted area, allowing for low drag-to-lift ratio at high speeds. Ventilation rate and heel angle are important parameters for the performance of air cavity ship (ACS). This study investigates the characteristics of ACS under different ventilation rates and heel angles using numerical simulation. The results show good agreement with experimental data, with less than 5% difference in total resistance.
Article
Mechanics
Zhendong Bian, Tezhuan Du, Jianlin Huang, Jingzhu Wang, Yiwei Wang
Summary: Cavitation research is significant in fields like mechanical drag reduction, material processing, and new medical device development. This study proposes a focus-type model for energy transfer in bubble clusters and analyzes the relationship between energy transfer and dimensionless distance. The study finds that relative energy transfer decreases as dimensionless distance increases and observes a strong correlation between the pressure focusing effect of bubble clusters and dimensionless distance.
Article
Mechanics
Rafael F. L. Cerqueira, Emilio E. Paladino, Fabien Evrard, Fabian Denner, Berend van Wachem
Summary: This paper presents a multiscale three-dimensional CFD model for simulating two-phase gas-liquid flows with different interface length scales, focusing on slug flow pattern. The validation study shows good agreement between numerical results and experimental data, and the presence of small dispersed bubbles affects the flow structure around Taylor bubbles, increasing their terminal velocity and influencing the flow structure in the wake region, related to heat and mass transfer rates in slug flow.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2021)
Article
Mathematics, Interdisciplinary Applications
Dorian Faroux, Kimiaki Washino, Takuya Tsuji, Toshitsugu Tanaka
Summary: In this paper, an Eulerian numerical implementation of the non-local granular fluidity model (NGF) is proposed, based on a finite volume method and the volume-of-fluid interface capturing method. The implementation is straightforward and suitable for steady flow problems involving evolving boundaries or two distinct phases.
COMPUTATIONAL PARTICLE MECHANICS
(2022)
Article
Environmental Sciences
Tirtha Roy-Biswas, Dhrubajyoti Sen
Summary: This study provides a systematic assessment of 2D RANS-VOF simulation of positive surge wave propagation in open channels using different turbulence models. The results show that the standard k-epsilon model does not accurately simulate the free surface features of the surge wave, while the RNG k-epsilon and the k-omega SST models perform better in this regard. The study also finds that the RNG k-epsilon model has weaknesses in capturing the recirculation zone, while the k-omega SST model simulates the velocity characteristics and flow structures with better accuracy.
ENVIRONMENTAL FLUID MECHANICS
(2022)
Article
Mechanics
P. Lubin, S. Glockner
JOURNAL OF FLUID MECHANICS
(2015)
Article
Environmental Sciences
Pierre Lubin, Hubert Chanson
ENVIRONMENTAL FLUID MECHANICS
(2017)
Article
Mechanics
Pierre Lubin, Olivier Kimmoun, Fabrice Veron, Stephane Glockner
EUROPEAN JOURNAL OF MECHANICS B-FLUIDS
(2019)
Article
Environmental Sciences
Adrien Berchet, Bruno Simon, Anthony Beaudoin, Pierre Lubin, Germain Rousseaux, Serge Huberson
INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH
(2018)
Editorial Material
Engineering, Civil
Hubert Chanson, Pierre Lubin
CANADIAN JOURNAL OF CIVIL ENGINEERING
(2010)
Article
Marine & Freshwater Biology
Hubert Chanson, David Reungoat, Bruno Simon, Pierre Lubin
ESTUARINE COASTAL AND SHELF SCIENCE
(2011)
Article
Mechanics
Pierre Lubin, Stephane Glockner, Olivier Kimmoun, Hubert Branger
EUROPEAN JOURNAL OF MECHANICS B-FLUIDS
(2011)
Article
Thermodynamics
Jerome Larocque, Stephane Vincent, Delphine Lacanette, Pierre Lubin, Jean-Paul Caltagirone
INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW
(2010)
Article
Engineering, Mechanical
Denis Brouilliot, Pierre Lubin
JOURNAL OF FLUIDS AND STRUCTURES
(2013)
Article
Mechanics
Pierre Lubin, Stephane Glockner, Hubert Chanson
MECHANICS RESEARCH COMMUNICATIONS
(2010)
Editorial Material
Mechanics
Henrik Kalisch, Mario Ricchiuto, Philippe Bonneton, Mathieu Colin, Pierre Lubin
EUROPEAN JOURNAL OF MECHANICS B-FLUIDS
(2019)
Article
Computer Science, Interdisciplinary Applications
Felix Henri, Mathieu Coquerelle, Pierre Lubin
Summary: A robust and high order reinitialization strategy in a level set framework is introduced with the RCP method and a new algorithm for detecting ill-defined points, leading to improved accuracy and robustness of level set methods.
JOURNAL OF COMPUTATIONAL PHYSICS
(2022)
Article
Engineering, Civil
David Reungoat, Pierre Lubin, Xinqian Leng, Hubert Chanson
COASTAL ENGINEERING JOURNAL
(2018)
Article
Engineering, Civil
Xinqian Leng, Bruno Simon, Nazanin Khezri, Pierre Lubin, Hubert Chanson
COASTAL ENGINEERING JOURNAL
(2018)
Article
Mechanics
Essam Nabil Ahmed, Alessandro Bottaro
Summary: This study focuses on the fully developed, steady, incompressible, laminar flow in a channel with rough and/or permeable walls. The influence of micro-structured boundary surfaces on the flow behavior is simulated using high-order effective boundary conditions derived from homogenization theory without empirical parameters. A closed-form solution of the Navier-Stokes equations is obtained for the flow in the channel, incorporating slip velocities, shear stress, and streamwise pressure gradient at each virtual boundary. The accuracy and applicability of the model are validated against full feature-resolving simulations for different textures. The Stokes-based model used to identify slip and interface permeability coefficients in the effective boundary conditions is reliable and accurate up to a certain threshold, beyond which advective effects need to be considered.
EUROPEAN JOURNAL OF MECHANICS B-FLUIDS
(2024)
Article
Mechanics
Mustafa Turkyilmazoglu, Faisal Z. Duraihem
Summary: Thermally-driven natural convection in a porous layer is explored theoretically in this work based on Darcy's law. The study focuses on the non-circulating basic cellular flow between two infinitely long horizontal plates and its instability onset. The results show that a circulatory flow and temperature variation along the horizontal axis govern the motion, and the instability can be determined through linear stability analysis and numerical calculations.
EUROPEAN JOURNAL OF MECHANICS B-FLUIDS
(2024)
Article
Mechanics
P. Roca Ramis de Ayreflor, A. Viudez
Summary: In this study, the inelastic interactions between a small, intense dipole and a weak, neutral monopole in two-dimensional flows are examined. It is found that dipoles with small size but large amplitude can cross and scatter off the neutral vortex, while leaving the vortex stable.
EUROPEAN JOURNAL OF MECHANICS B-FLUIDS
(2024)
Article
Mechanics
Nilanjan Mondal, Chirodeep Bakli
Summary: This study presents a micro-nanochannel junction with directional flow achieved by a combination of junction geometry and wall functionalization. The system acts as a fluid diode with asymmetric pressure drop and flow rate in the nanochannel. The directional junction transport can be tuned with slip length, providing a key parameter for engineering various applications. The findings contribute to the understanding of flow rectification systems in nanochannels and have implications for capillary blood flow, desalination systems, and energy storage devices.
EUROPEAN JOURNAL OF MECHANICS B-FLUIDS
(2024)
Article
Mechanics
Ussama Ali, Anas Ghannam, Md Islam, Isam Janajreh
Summary: This study utilizes a passive flow control technique involving a slit through a circular structure to dampen flow-induced vibration. The results demonstrate that the presence of a slit can decrease lift and drag coefficients and suppress flow-induced vibration.
EUROPEAN JOURNAL OF MECHANICS B-FLUIDS
(2024)
Article
Mechanics
Sebastian A. Altmeyer
Summary: This article investigates how an alternating magnetic field can restrict and suppress the generation of vortices in ferrofluidic Couette flow. It finds that when the initially rotating outer cylinder is suddenly stopped, more complex vortex dynamics are generated in the system, and the presence of an alternating magnetic field can modify these dynamics, mainly depending on the modulation amplitude of the field.
EUROPEAN JOURNAL OF MECHANICS B-FLUIDS
(2024)
Article
Mechanics
Pradeep, L. P. Singh
Summary: This study focuses on the analytical solution to the Riemann problem for a 1-D non-ideal flow of dusty gas with external force. The elementary wave curves, including rarefaction wave, shock wave, and contact discontinuity, were obtained and their implications on density, velocity of flow, and shock speed were examined. The addition of external force results in non-self-similar solutions.
EUROPEAN JOURNAL OF MECHANICS B-FLUIDS
(2024)
Article
Mechanics
Meng Fan, Antoine Dazin, Gerard Bois, Francesco Romano
Summary: This study investigates the prominent features of the primary instabilities of a turbulent source flow between finite-span parallel rings with spatially modulated inflow conditions rotating at angular rate n. Two different two-dimensional instabilities that occur at large and low flow rates have been traced back to two different physical mechanisms related to jet-wake and mean-core flow, respectively. The effect of the radial aspect ratios on the instability characteristics of the flow between parallel rings is also considered.
EUROPEAN JOURNAL OF MECHANICS B-FLUIDS
(2024)
Article
Mechanics
Yasmin Hengster, Martin Lellep, Julian Weigel, Matthew Bross, Johannes Bosbach, Daniel Schanz, Andreas Schroder, Florian Huhn, Matteo Novara, Daniel Garaboa Paz, Christian J. Kahler, Moritz Linkmann
Summary: Using curvature and torsion to describe Lagrangian trajectories provides insights into small and large time scales. Probability density functions (PDFs) of curvature and torsion were calculated for experimental Lagrangian trajectories in different flows, and were compared with experimental and numerical simulation results. The effect of anisotropy on geometry or tracer particle trajectories was quantified using the curvature vector, which was found to be related to velocity fluctuations.
EUROPEAN JOURNAL OF MECHANICS B-FLUIDS
(2024)
Article
Mechanics
Nang X. Ho, Truong V. Vu
Summary: The present paper reports numerical results on the solidification process of a hollow drop on an inclined surface. The drop undergoes deformation and forms an asymmetric tip as the surface angle increases. The solidification time, however, is not affected by the surface angle. The fluid accumulates at the bottom of the drop and the bubble moves upwards before being trapped by solidification. A larger bubble reduces the tip shift. The effect of Bond number and Stefan number on solidification is also considered.
EUROPEAN JOURNAL OF MECHANICS B-FLUIDS
(2024)
Article
Mechanics
Idalia Jagodzinska, Bartosz Olszanski, Konrad Gumowski, Slawomir Kubacki
Summary: This study investigates the characteristics of high subsonic and transonic flows through a linear cascade using experimental investigations and numerical simulations. The experiments measured static pressure, flow field, and turbulent intensity, and provided inlet conditions for the numerical simulations. The simulations validated the experimental data and tested the applicability of the turbulence models.
EUROPEAN JOURNAL OF MECHANICS B-FLUIDS
(2024)
Article
Mechanics
Kun Sung Park, Ali Zamiri, Minsuk Choi, Byung Ju Lee, Jin Taek Chung
Summary: In this study, the stator geometry of a single-stage transonic fan was optimized to improve its aerodynamic performance and stall margin. Steady and unsteady simulations were conducted to analyze the impact of shock waves generated by the rotor blade on the stator inlet flow. Using a design of experiment and response surface method, an optimal geometry of the stator blade was obtained to increase the fan's efficiency and stall margin.
EUROPEAN JOURNAL OF MECHANICS B-FLUIDS
(2024)
Article
Mechanics
Yuanzhao Zhang, Bo Li
Summary: This study investigated the effects of longitudinal and lateral spacing on the aerodynamic drag characteristics of the whole team and each member in speed skating team pursuit competition. The results showed that decreasing the longitudinal spacing resulted in greater drag reduction for the whole team and individual skaters. Furthermore, lateral movement of the leading skater also led to additional drag reduction for the team. Computational fluid dynamics simulations revealed differences in drag distribution between the leading skater and the middle and last skaters.
EUROPEAN JOURNAL OF MECHANICS B-FLUIDS
(2024)
Article
Mechanics
Sichang Xu, Chris Peirone, Eugene Ryzer, Gary W. Rankin
Summary: This paper presents a study of a special bistable load-type supersonic fluidic oscillator capable of producing self-sustained oscillations in two gas pressure chambers. The experimental portion verifies the robust nature of the device performance and shows distinct differences compared to a similar prototype. A three-dimensional computational fluid dynamics model is required to accurately simulate the transient filling process, leading to an unaffordable computational cost. To address this issue, a low-order fluid circuit model is developed, which provides an accurate and rapid prediction of the transient performance.
EUROPEAN JOURNAL OF MECHANICS B-FLUIDS
(2024)
Article
Mechanics
Sampson Davis, Eli Shellabarger, James Miller, Thomas Ward
Summary: The present work focuses on studying the effects of shock wave - boundary layer interaction in 2D hypersonic flow at the sharp leading edge of a flat plate and a flat plate followed by a compression ramp. A key parameter, the hypersonic interaction parameter x, is defined and analyzed using a semi-analytic reduced-order model. The study aims to improve on existing methods by characterizing the viscous boundary layer and investigating the upstream influence resulting from the compression ramp.
EUROPEAN JOURNAL OF MECHANICS B-FLUIDS
(2024)
