Article
Engineering, Electrical & Electronic
Jorge M. Monsalve, Anton Melnikov, Michael Stolz, Andreas Mrosk, Marcel Jongmanns, Franziska Wall, Sergiu Langa, Ioana Marica-Bercu, Tim Brandel, Marco Kircher, Hermann A. G. Schenk, Bert Kaiser, Harald Schenk
Summary: This paper presents an alternative implementation of an electrostatic Micromachined Ultrasonic Transducer using multiple beams for displacement instead of a single membrane. The designed transducer shows low voltage requirement, small size, high damping, and operates in a wide frequency range. However, reducing the noise level is crucial for its application as a rangefinder.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Optics
Cheng Fang, Jun Zou
Summary: This Letter introduces an acoustic-resolution-photoacoustic microscopy (AR-PAM) based on a new optically transparent PVDF transducer, achieving high acoustic resolution and sensitivity. Experimental results on water, chicken breast tissue, and in vivo on a mouse tail demonstrate the capability of resolving targets at different depths.
Article
Engineering, Electrical & Electronic
Jiewen Lang, Chengde Tong, Jingang Bai, Ping Zheng, Jiaqi Liu, Guopeng Liu
Summary: This article proposes a new type of interior-modulating-rotor axial-flux magnetic-geared double-rotor machine (IMR-AMGDRM), and studies its magnetic field distribution and electromagnetic performance using an analytical model. The results are compared with 3-D finite element analysis, and the influence of geometrical parameters is investigated.
IEEE TRANSACTIONS ON MAGNETICS
(2022)
Article
Engineering, Manufacturing
E. Polyzos, S. B. Ravindranath, D. Van Hemelrijck, L. Pyl
Summary: Additively manufactured thermoplastic parts using Fused Filament Fabrication (FFF) exhibit transversely isotropic characteristics, mainly attributed to bond formation. Micro-CT images visualize long concave and convex voids extending parallel to the printing direction. Novel analytical techniques for accurately modeling void geometry show excellent agreement with Finite Element models.
ADDITIVE MANUFACTURING
(2021)
Article
Engineering, Mechanical
Yangsheng Zhu, Zhiwei Liu, Mingjing Qi, Xiaojun Yan
Summary: The paper investigates the nonlinear vibration characteristics of a self-excited electrostatic actuator and uses modeling and solution methods to optimize the actuator for enhanced power density and efficiency.
NONLINEAR DYNAMICS
(2021)
Article
Materials Science, Multidisciplinary
K. G. Wang
Summary: The kinetics of phase coarsening in a dense binary, two-phase system were theoretically studied and existing relations were recovered and generalized. Equations for particle size distribution and coarsening were rigorously derived. An interesting finding is that the scaling exponent, m, for the kinetics of phase coarsening at ultra high volume fractions takes values in the range 2 < m < 3, depending on the precise volume fraction of the dispersed phase, when varied over the narrow range 0.9 < V-V < 1. The particle size distributions derived in this study depend on volume fractions, which is different from Wagner's particle size distribution for interface-reaction-controlled phase coarsening. The current work substantiates that the kinetics of phase coarsening at ultra high volume fractions exhibits a blend of both interface-reaction-controlled and volume diffusion-controlled phase coarsening.
Review
Engineering, Chemical
Y. Y. Liang
Summary: In the past two decades, pressure retarded osmosis (PRO) has received attention as an efficient method to harvest energy from salinity difference. However, it was only since the 2010s that more efforts were made to optimize PRO processes using simulation models, including analytical and numerical models. Mathematical simulation is important for understanding and improving the complex PRO process, and computer simulation advancements may lead to breakthroughs in PRO technology. This paper provides a critical review of mathematical modeling methodology and assumptions, as well as the current state of modeling application in PRO. It also proposes a multi-scale modeling approach for describing PRO full-scale performance.
Article
Environmental Sciences
Jannes Kordilla, Marco Dentz, Alexandre M. Tartakovsky
Summary: Infiltration processes in fractured-porous media are crucial but not well understood. Flow dynamics in fractures under partially saturated conditions contribute to the fastest infiltration velocities, and the dynamics at fracture intersections determine the flow fragmentation and dispersion of fracture networks. This study provides an analytical concept to potentially reconstruct internal fracture network geometries from external boundary information.
WATER RESOURCES RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Timo Saksala
Summary: This paper aims to predict the temperature effect on the tensile strength of granitic rock using a numerical approach. It is found that the temperature dependence of the quartz mineral near 573 degrees Celsius is the main factor leading to thermal cracking and degradation of tensile strength. Numerical simulations demonstrate that the proposed approach can accurately predict the experimental deterioration of the tensile strength of the rock.
APPLIED SCIENCES-BASEL
(2021)
Article
Chemistry, Physical
Jean Lerme, Jeremie Margueritat, Aurelien Crut
Summary: This study explores the coupling effects between two nanostructures and their impact on vibrational frequencies through theoretical and numerical analysis. Changes in vibrational frequencies of identical nanostructures mechanically coupled by a spacer of different material are observed as the spacer thickness varies, attributed to modifications of boundary conditions or avoided crossing effects.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Physics, Multidisciplinary
Abdelghafour Abraray, Diogo Nunes, Stanislav Maslovski
Summary: In this article, analytical-numerical models for reconfigurable reflecting metasurfaces are developed and their accuracy is validated through simulations. Furthermore, a design for a metasurface control network with independent programming capability is proposed.
NEW JOURNAL OF PHYSICS
(2022)
Article
Engineering, Multidisciplinary
Harrond Nimjieu Takoudjou, Nicodeme R. Sikame Tagne, Peguy R. Nwagoum Tuwa, Romuald Tapimo, Medard Fogue, Ebenezer Njeugna
Summary: This paper investigates the thermal conductivity of raffia vinifera bamboo using mathematical models and presents both analytical and numerical solutions. The results demonstrate that the proposed methods accurately predict the temperature distribution, indicating that raffia vinifera bamboo can be used as thermal insulation in buildings.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Muhsin Kilic, Mustafa Mutlu, Ayse Fidan Altun
Summary: This study introduces a numerical simulation model and an analytical method to evaluate the particle collection efficiency and transport phenomena in an electrostatic precipitator (ESP). The research investigates the effects of supply voltage, charging wire diameter, distance between charging and collecting electrodes, and main fluid inlet velocity on the performance of ESP. The results show that these factors significantly affect the acquired charges on the electrostatic field and particle collecting efficiencies.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Chemical
Tuan Hung Nguyen, Philippe Le Grognec
Summary: This paper focuses on theoretical modeling of bonded structures, specifically the single-lap joint, and develops a specific 1D enriched finite element for numerical modeling. Analytical solutions for a single-lap joint under tensile forces are investigated in terms of elasticity, emphasizing the importance of non-linear terms in the polynomial expressions of longitudinal and transverse displacements within the adhesive. The developed finite element model is validated by comparison with 2D reference results computed using Abaqus software, showing a complete and accurate description of stress fields, especially within the adhesive layer.
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
(2021)
Article
Mechanics
Yuyang Lin, Yunlai Shi, Jun Zhang, Haichao Sun, Han Sun
Summary: This paper presents an analytical model of a butterfly-shaped piezoelectric composite transducer. The vibration model and electromechanical coupling model of the transducer are derived and validated with experimental results. The proposed analytical model shows good agreement with the experiment results.
ARCHIVE OF APPLIED MECHANICS
(2022)
Article
Acoustics
Petr Honzik, Michel Bruneau
ACTA ACUSTICA UNITED WITH ACUSTICA
(2015)
Article
Acoustics
Petr Honzik, Francois Fohr, Michel Bruneau
Article
Acoustics
Antonin Novak, Frantisek Rund, Petr Honzik
JOURNAL OF THE AUDIO ENGINEERING SOCIETY
(2016)
Article
Acoustics
A. Novak, P. Honzik, M. Bruneau
JOURNAL OF SOUND AND VIBRATION
(2017)
Article
Acoustics
Petr Honzik, Zdenek Skvor, Stephane Durand, Michel Bruneau
ACTA ACUSTICA UNITED WITH ACUSTICA
(2009)
Article
Acoustics
Petr Honzik, Stephane Durand, Nicolas Joly, Michel Bruneau
ACTA ACUSTICA UNITED WITH ACUSTICA
(2013)
Article
Instruments & Instrumentation
Petr Honzik, Nicolas Joly, Stephane Durand, Dominique Rodrigues, Jean-Noel Durocher, Michel Bruneau
Article
Acoustics
Nicolas Joly, Petr Honzik
ACTA ACUSTICA UNITED WITH ACUSTICA
(2019)
Article
Acoustics
K. Simonova, P. Honzik, M. Bruneau, P. Gatignol
JOURNAL OF SOUND AND VIBRATION
(2020)
Article
Acoustics
P. Honzik, M. Bruneau, S. Durand, N. Joly
Summary: The paper aims to provide a suitable analytical approach for describing the behavior of a miniaturized square MEMS receiving transducer, optimizing sensitivity while maintaining a Cartesian geometry and minimum dimensions. The analytical method introduced in this study avoids difficulties of multi-modal analysis caused by geometrical discontinuity, and presents an approximate analytical solution for estimating sensitivity in the lower frequency range. The FEM solutions provided were used to test against the analytical results.
JOURNAL OF SOUND AND VIBRATION
(2021)
Proceedings Paper
Engineering, Multidisciplinary
P. Honzik, C. Guianvarc'h, M. Bruneauc