Article
Mechanics
Shihao Yang, Tiancai Tan, Jiang Lai
Summary: This paper investigates the common and important squeeze film effects between two concentric cylinders in mechanical systems. It develops models for cylindrical squeeze film force and vibrating system with squeeze film effects. The influence of a harmonic exciting force on a spring damped vibrator with squeeze film effect is studied using a non-linear mathematical model, and the behavior of the system is investigated numerically. The study reveals consistent fundamental frequency, superharmonic phenomenon, and the impact of flow convection non-linearity on the system.
Article
Computer Science, Interdisciplinary Applications
Massimo Nespoli, Maria Elina Belardinelli, Marco Calo, Anna Tramelli, Maurizio Bonafede
Summary: This paper introduces a numerical model for representing displacement, strain, and stress due to single forces in a layered elastic half-space. The model can support forward modeling of deformation sources and inversion of geodetic data in a layered medium.
COMPUTERS & GEOSCIENCES
(2022)
Article
Chemistry, Physical
Jean-Baptiste Fournier
Summary: Particles in soft matter interact through the deformation field they create. This interaction can be applied to study interactions between different types of particles.
Article
Energy & Fuels
Tianzi Bai, Rogerio Manica, Qingxia Liu
Summary: In this study, the initial film drainage process between a high-viscosity bitumen droplet and a hydrophobic silica wafer was investigated. The results showed that the viscosity of the bitumen has a significant impact on the formation and drainage of the thin liquid film.
Article
Engineering, Civil
Jingnan Ding, Jinsong Zhu, Teng Shi
Summary: This paper investigates the behavior of stud connectors in ultra-high performance concrete under combined shear and tension loads through experiments and finite element analysis. The study finds that the stud connectors exhibit shear and tension failure characteristics under combined loads, and the ratio of tension to shear has a minimal effect on shear resistance and ductility. The aspect ratio of the studs is positively related to shear resistance and ductility but has no effect on shear stiffness. As the ratio of tension to shear increases, there is a significant reduction in shear resistance, relative slip, and shear stiffness of the stud connectors. However, the effect of tensile stress on the shear strength of studs can be ignored when the tensile shear ratio is less than 0.17. The proposed shear strength reduction factor, which considers the ratio of tension to shear, provides more accurate predictions of shear resistance under combined loads.
ENGINEERING STRUCTURES
(2023)
Article
Physics, Fluids & Plasmas
Davide Venturelli, Andrea Gambassi
Summary: We investigate the nonequilibrium dynamics of two particles coupled to a thermally fluctuating scalar field and confined in separate harmonic potentials. When one of these particles is subjected to an external periodic driving, their motion synchronizes due to the field-mediated effective interaction, leading to a nonequilibrium periodic state. We analyze the nonlinear response of the second particle as a function of the driving frequency, particularly far from the adiabatic regime, and compare the perturbative, analytic solution to its adiabatic approximation, validating our predictions through numerical simulations.
Article
Chemistry, Physical
Zhan Liu, Kaifeng Yuan, Yuanliang Liu, Yinan Qiu, Gang Lei
Summary: This study establishes a numerical model to simulate fluid sloshing, considering the phase change occurring within the tank. The acceptability of the numerical model is verified through experimental validation and mesh sensitivity analysis. It is found that gravity acceleration has a significant influence on the characteristics of fluid sloshing, and becomes more prominent when the gravity acceleration exceeds 4g(0).
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Multidisciplinary Sciences
J. Tapia, N. Vera, Joao Aguilar, M. Gonzalez, S. A. Sanchez, P. Coelho, C. Saavedra, J. Staforelli
Summary: Using dual time resolved membrane fluctuation spectroscopy, it was found that human red blood cell membrane fluctuation is dependent on d-glucose concentration, with mechanical parameters changing accordingly. Under different d-glucose concentrations, an increase in the fluctuation amplitude of the lipid bilayer was observed, along with a decrease in tension value, bending modulus, and fluidity.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Physical
Michiel Sprik
Summary: Using diffusion coupled deformation theory, this study investigates how the elastic properties of a solid body are altered when maintaining chemomechanical equilibrium with a melt. The results indicate that enforcing chemomechanical equilibrium with the liquid reservoir reduces the bulk modulus of the solid to zero while the shear modulus remains finite. Additionally, the density dependence of the shear modulus is found to be a second order effect reducing the density of the stressed solid.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Geochemistry & Geophysics
Charlotte L. DeVitre, Chelsea M. Allison, Esteban Gazel
Summary: The study proposed a new Fluid Density Calibration Apparatus (FDCA) with improved temperature measurement accuracy for CO2 densimetry in inclusions. Five new precise calibration equations were developed for different temperature and CO2 density ranges, resulting in total percent uncertainty below 5% in CO2 content calculations for samples, significantly outperforming existing literature densimeters with uncertainty higher than 10% and up to 28%.
Article
Geosciences, Multidisciplinary
Xiuyan Liu, Honghan Chen, Chunquan Li
Summary: The fluorescence spectra of oil inclusions can be significantly altered by UV irradiation during laboratory process. Therefore, the influence of UV irradiation should be considered when classifying oil inclusions based on fluorescence.
Article
Materials Science, Multidisciplinary
Zilong Qiu, Annelies Malfliet, Bart Blanpain, Muxing Guo
Summary: The dynamic behavior of non-metallic inclusions at the bubble/steel interface or at the slag/steel interface is crucial for the production of clean steel. The long-range force between inclusions, believed to be capillary force, plays a significant role in inclusion removal. However, the currently used K-P model for calculating this force may introduce errors when applied to non-spherical particles, such as disc-like inclusions. Our recently developed sub-particle model provides a more accurate calculation, capturing the anisotropic character of interaction between elliptical discs.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2022)
Article
Physics, Applied
J. Barbish, C. Ti, K. L. Ekinci, M. R. Paul
Summary: We investigate the dynamics of a nanoscale doubly clamped beam that is under high tension, immersed in a viscous fluid, and driven externally by a spatially varying drive force. A theoretical description is developed and compared with experimental measurements for electrothermally driven nanoscale beams in air and water. The results show good agreement between theory and experiment, confirming the validity of a simplified string approximation.
JOURNAL OF APPLIED PHYSICS
(2022)
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
Yuanxing Dai, Zhenghao Liu, Wei Zhang, Jianping Chen, Jianguo Liu
Summary: This paper investigates the vibration problem in a high power density and low specific speed axial flow waterjet propeller. By utilizing fluid-structure coupling vibration analysis, modal analysis, and ship tests, the study examines the unsteady fluid-structure coupling of a waterjet propeller and investigates the vibration characteristics under different speed conditions. The results indicate that the vibrations mainly originate from the rotor's frequency response and structural resonance response. Both frequency distribution characteristics and amplitude intensity increase with higher rotation speeds. The study also analyzes the variations in the propeller vibration characteristics with respect to changes in the gap spacings between the rotor and stator, leading to the identification of the variation law of vibration intensity with rotor-stator spacing.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)