Article
Engineering, Marine
Fatih Cuneyd Korkmaz
Summary: This study investigates the effects of the viscosity of stratified layers on liquid sloshing in a rectangular tank. The experimental results show that viscous friction leads to energy dissipation and less free surface deformation. By adding a layer of higher viscosity fluid in the upper layer, the deformation effects of the fluid are reduced, and the lower layer experiences significant damping effects.
Article
Chemistry, Multidisciplinary
Leon Cillie Malan, Chiara Pilloton, Andrea Colagrossi, Arnaud George Malan
Summary: In this study, the slosh-induced damping in a vertically excited tank filled with liquid water or oil and air is investigated through experimental and numerical simulations. Two different numerical approaches are used to simulate the experiments, and reasonable agreement on the energy dissipation evolution is observed between the methods. The Smoothed Particle Hydrodynamics (SPH) simulations show a faster convergence rate but tend to overpredict the total dissipation compared to the experiment, while the incompressible liquid and weakly compressible gas model simulations by Finite Volume Method (FVM) tend to underestimate it. The comparison of center of mass positions shows that the SPH results have larger vertical center of mass motion compared to the FVM results, especially for the high Reynolds number case. This difference may be attributed to the absence of the air phase in the SPH simulations and the need for higher spatial resolutions in the FVM simulations to resolve the complex gas-liquid interactions, especially in three dimensions.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Marine
Peng Huang
Summary: This paper comprehensively investigates the effects of vertical baffle on liquid sloshing behaviors in rectangular water tanks using CFD method and finite volume model. The influences of factors such as excitation amplitude, water depth, number of baffles, baffle position, and baffle height are extensively explored. The accuracy of the modeling is confirmed through rigorous comparisons with existing experimental results.
Article
Acoustics
L. Constantin, J. De Courcy, B. Titurus, T. C. S. Rendall, J. E. Cooper
Summary: This work presents an experimental investigation of damping induced by vertically sloshing liquids at large amplitudes. The results show that the damping deviates from linearity with increasing excitation amplitude, and the analysis of hysteresis cycles offers insight into the force variation.
JOURNAL OF SOUND AND VIBRATION
(2023)
Article
Construction & Building Technology
Congzhen Xiao, Zhenhong Wu, Kai Chen, Yi Tang, Yalin Yan
Summary: A passive liquid control system called TLD with a stable replenishment sub-tank system (TLD-SRS) is proposed to solve the problem of water overfilling in fire-suppression liquid tanks. The system, consisting of an additional sub-tank and a floating ball, automatically replenishes liquid in the TLD, avoiding vibration interference and maintaining normal operation under wind loads. Verified on a large-scale TLD shaking table experiment, the TLD-SRS significantly reduces liquid overshoot and acceleration on the building roof compared to regular liquid replenishment devices.
Article
Engineering, Ocean
J. J. Wiegerink, T. E. Baldock, D. P. Callaghan, C. M. Wang
Summary: This paper introduces a new concept of slosh suppression blocks to mitigate sloshing in floating closed containment aquaculture systems. The blocks reduce sloshing periods and turbulent motions in the tank, creating a calmer environment for fish wellbeing.
APPLIED OCEAN RESEARCH
(2022)
Article
Engineering, Civil
Heng Jin, Andrea Calabrese, Yong Liu
Summary: This study numerically modeled the hydrodynamic characteristics of liquid sloshing in a 2D rectangular tank and the pressure response in a typical industrial container due to external excitation. The effects of filling depth, ground motion components, and damping baffle on pressure response history under impulsive and convective modes were examined. A damping baffle system suitable for all seismic excitations was developed based on dynamic response analysis, contributing to improving tank design in earthquake-prone areas.
ENGINEERING STRUCTURES
(2021)
Article
Chemistry, Multidisciplinary
Wendi Liu, Omar Ahmed Mahfoze, Stephen M. Longshaw, Alex Skillen, David R. Emerson
Summary: This study investigates the damping effect of liquid sloshing in an aircraft wing-like structure through numerical simulations. The findings show that the sloshing patterns and damping are influenced by the excitation amplitude and the number of baffled compartments in the tank. The damping decreases with an increase in the number of compartments under small excitation amplitudes, while it remains relatively constant under large excitation amplitudes.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Mechanical
Jon Martinez-Carrascal, Marco Pizzoli, Francesco Saltari, Franco Mastroddi, Leo Miguel Gonzalez-Gutierrez
Summary: The aim of this paper is to provide a Reduced Order Model (ROM) for accurate prediction of liquid induced dissipation in violent and vertical sloshing problems across a wide range of liquid properties. The Delta Smoothed Particle Hydrodynamics (delta-SPH) formulation is used to establish a simulation database, from which an equivalent mechanical model is identified and a hypersurface-based ROM is defined. The ROM effectively estimates bouncing ball design parameters and consistently matches SPH test simulations, indicating its practical and resource-efficient use for predicting critical aspects of vertical sloshing.
NONLINEAR DYNAMICS
(2023)
Article
Energy & Fuels
Yinan Qiu, Minkai Bai, Yuanliang Liu, Gang Lei, Zhan Liu
Summary: Fluid sloshing in cryogenic fuel storage tanks during liquid hydrogen transportation is a significant safety concern. This study utilizes the volume of fluid (VOF) method to analyze the hydrodynamic performance of fluid sloshing. The research finds that the initial liquid filling level has a noticeable impact on sloshing characteristics, with higher filling levels resulting in larger sloshing forces, fluid pressures, interface areas, and interface fluctuations. The free interface experiences fluctuations due to the tank's first natural frequency, and the interface monitor near the tank wall shows significant displacement fluctuations.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Engineering, Marine
Lizhu Wang, Min Xu, Qian Zhang
Summary: This study investigates the damping effect and mechanism of vertical baffles in shallow liquid sloshing under a rotational excitation using an improved particle method. The results show that the damping effect of vertical baffles is affected by the height and position of the baffle, and the resonance characteristics of sloshing are altered when static water is divided into two parts by the vertical baffle.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2021)
Article
Engineering, Aerospace
Shugo Date, Yoshiaki Abe, Tomonaga Okabe
Summary: This study investigates the effects of fiber properties on the static aeroelastic design of aircraft wings. The results indicate that using the T1100G fiber can reduce the structural weight while maintaining the same lift, due to its high buckling resistance and tensile strength.
AEROSPACE SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Marine
Wen-Huai Tsao, Li-Hsiang Huang, Wei-Shien Hwang
Summary: The paper investigates the sloshing frequencies and linear and nonlinear damping of sloshing liquid in a rectangular tank occupied by porous media through impulsive and harmonic experiments. An equivalent mechanical model based on Darcy's law is developed for comparison. Nonlinear damping effects are justified by establishing the relationships between equivalent damping ratio, wave amplitude, and ground displacement amplitude.
Article
Mechanics
Spyridon Kilimtzidis, Athanasios Kotzakolios, Vassilis Kostopoulos
Summary: A new optimization framework is proposed to optimize the composite materials aircraft wings based on low-cost numerical tools for stiffness, strength, and dynamic aeroelastic constraints. The developed framework successfully guides the mass of the wing to a minimum while satisfying the constraints under a critical loading scenario. The presented optimization framework exhibits high accuracy and efficiency, providing a robust numerical tool for the early design stages of composite aircraft wings.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Marine
Jeoungkyu Lee, Yangjun Ahn, Yonghwan Kim
Summary: This study conducted experiments to examine the effect of density ratio and phase transition on sloshing impact, using the liquid NOVEC 7000 to create conditions for potential phase transition. The results showed that presence of gas pockets during sloshing impact led to reduced oscillation and increased pressure rise time at the boiling point.
Article
Engineering, Mechanical
Marco Pizzoli, Francesco Saltari, Franco Mastroddi, Jon Martinez-Carrascal, Leo M. Gonzalez-Gutierrez
Summary: The aim of this work is to provide a reduced-order model using a feed forward neural network to describe the dissipative behavior of nonlinear vertical sloshing involving Rayleigh-Taylor instability. A 1-degree-of-freedom system was used as a representative of fluid-structure interaction problem, with sloshing replaced by a boxed-in bouncing ball model with parameters tuned based on experiments. The neural network model, trained on a large dataset of bouncing ball simulations, has shown promising performances for integration in complex structural systems.
NONLINEAR DYNAMICS
(2022)
Correction
Engineering, Mechanical
J. Martinez-Carrascal, L. M. Gonzalez-Gutierrez
JOURNAL OF FLUIDS AND STRUCTURES
(2021)
Article
Physics, Fluids & Plasmas
S. Marrone, A. Colagrossi, J. Calderon-Sanchez, J. Martinez-Carrascal
Summary: This study presents a numerical investigation on the energy balance of violently accelerated flows confined inside a container, with experimental validation of the theoretical formulation. The complexity of fluid dynamic behavior inside the container is explained through numerical studies on two different fluids, water and oil, showing differences in Reynolds number by two orders of magnitude. Results are compared to experimental measurements in terms of fluid-wall interaction and energy dissipation.
PHYSICAL REVIEW FLUIDS
(2021)
Article
Chemistry, Multidisciplinary
Jon Martinez-Carrascal, L. M. Gonzalez-Gutierrez, Javier Calderon-Sanchez
Summary: In this work, the fundamental aspects of an aeronautical sloshing problem were studied using a simplified model. Experimental and numerical methods were employed to investigate the characteristics and mechanics of sloshing in different fluids. The findings provide insights into the sloshing force and its relationship with tank movement and liquid's center of mass.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Mechanical
Javier Calderon-Sanchez, Jon Martinez-Carrascal, Leo Miguel Gonzalez
Summary: This study aims to analyze the effect of sloshing on reducing the design loads on aircraft structures using the numerical method SPH. Scaled experiments were conducted to validate the accuracy of computational tools, and a numerical model of a vertically oscillating tank was developed.
ACTA MECHANICA SINICA
(2023)
Article
Engineering, Mechanical
Jon Martinez-Carrascal, Leo M. Gonzalez
Summary: This paper investigates the effects of filling level, density ratio, and initial amplitude on the damping ratio of fuel sloshing in aircraft wing fuel tanks. The results indicate that a 50% fill level maximizes damping, and there is a positive relationship between the damping ratio and density ratio. The intensity of sloshing force and the phase-shift between the force and tank motion are key factors in interpreting liquid dissipation.
JOURNAL OF FLUIDS AND STRUCTURES
(2022)
Article
Engineering, Mechanical
Jon Martinez-Carrascal, Marco Pizzoli, Francesco Saltari, Franco Mastroddi, Leo Miguel Gonzalez-Gutierrez
Summary: The aim of this paper is to provide a Reduced Order Model (ROM) for accurate prediction of liquid induced dissipation in violent and vertical sloshing problems across a wide range of liquid properties. The Delta Smoothed Particle Hydrodynamics (delta-SPH) formulation is used to establish a simulation database, from which an equivalent mechanical model is identified and a hypersurface-based ROM is defined. The ROM effectively estimates bouncing ball design parameters and consistently matches SPH test simulations, indicating its practical and resource-efficient use for predicting critical aspects of vertical sloshing.
NONLINEAR DYNAMICS
(2023)
Article
Physics, Fluids & Plasmas
Jon Martinez-Carrascal, J. Calderon-Sanchez, L. M. Gonzalez-Gutierrez, A. de Andrea Gonzalez
Summary: This article extends the classical Rayleigh-Taylor instability to situations where the fluid is completely confined, analyzing the effect of adding surface tension to the interface in a 2D viscous periodic case. The study compares the linear stability analysis obtained through Navier-Stokes equations and WCSPH method, showing remarkable agreement in simulations with different tank sizes and Atwood numbers.
Article
Engineering, Multidisciplinary
J. Calderon-Sanchez, J. Martinez-Carrascal, L. M. Gonzalez-Gutierrez, A. Colagrossi
Summary: This study analyzes a dynamical system involving the decaying test of a partially filled liquid tank, aiming to understand the extra energy dissipation caused by the confined fluid and the interacting force between the fluid and the tank due to vertical sloshing. Through non-dimensional analysis and coupled numerical simulation, the study reveals the influence of various non-dimensional numbers on the system, showing that the numerical tool developed is capable of capturing different phenomena and assessing their impact.
ENGINEERING APPLICATIONS OF COMPUTATIONAL FLUID MECHANICS
(2021)
Article
Engineering, Mechanical
Xuyi Jia, Chunlin Gong, Wen Ji, Chunna Li
Summary: A flow sensing method for real-time forecast of flow field in FSI systems using structural deformation is proposed in this study. The method utilizes multilayer POD to improve accuracy and deep neural network to map mode coefficients. The results show that the proposed method performs accurately in flow properties forecasting and is suitable for FSI systems with complex flow structures.
JOURNAL OF FLUIDS AND STRUCTURES
(2024)
Article
Engineering, Mechanical
Paulo H. N. Silva, Gustavo R. S. Assi
Summary: This paper presents an experimental study of fluid-structure interaction, demonstrating that the controlled rotation of rods can reduce mean drag and fluctuating lift forces simultaneously. By using a multi-objective genetic algorithm, the optimum rotation speeds were found, resulting in a more significant reduction in objectives and energy consumption. The contribution of each rod depends on its angular position and the flow conditions generated by the upstream control rods. The study clarifies the physical principles of the phenomenon and paves the way for technological applications.
JOURNAL OF FLUIDS AND STRUCTURES
(2024)
Article
Engineering, Mechanical
Yacine Manal, Pascal Hemon
Summary: Synchronized unsteady wall pressure measurements were performed on a full-scale circular chimney subjected to natural wind. The analysis of the pressure distribution using bi-orthogonal decomposition was crucial for the success of the processing. The results showed that atmospheric turbulence plays a significant role in the unsteady pressure response on the chimney, generating high levels of RMS pressure.
JOURNAL OF FLUIDS AND STRUCTURES
(2024)
Article
Engineering, Mechanical
Hironori Takeda, Yusuke Asai, Shunichi Ishida, Yasutoshi Taniguchi, Takuya Terahara, Kenji Takizawa, Yohsuke Imai
Summary: Wrinkling and creasing of an elastic membrane in a shear flow can be influenced by shear rate and membrane thickness. The deformation type can be determined by mechanical and geometrical effects of the membrane thickness, based on the geometrical consistency of the capsule surface.
JOURNAL OF FLUIDS AND STRUCTURES
(2024)
