Ici vous trouverez les présentations issues des Conférences COMSOL à travers le monde. Réalisées par des utilisateurs de COMSOL Multiphysics, ces présentations explorent tous les domaines actuels d'innovation. Les applications couvrent pratiquement tous les secteurs industriels et impliquent des phénomènes électriques, mécaniques, fluidiques et chimiques. Utilisez la recherche rapide pour trouver les présentations les plus intéressantes dans votre domaine d'intérêt.

Consultez les proceedings de la Conference COMSOL 2020

Acoustics and Vibrationsx

Modeling of Acoustically Induced Rapid Mixing Processes in Microchannels Using Acoustic Streaming

S. Wiesinger1, W. Wiedemair1
1OST - University of Applied Sciences Eastern Switzerland, Buchs SG, St. Gallen, Switzerland

Technical advancements in miniaturization in the last decades have, among others, brought forth the technology of so called “Lab-on-a-Chip” (LOC) systems. These systems provide the possibility to automate and accelerate certain laboratory processes, e.g., biomedical diagnostics, on the ... En savoir plus

Advancements in Acoustic Topology Optimization

R. Christensen1
1Acculution ApS

The design of products in the audio industry is to a large extent done via a combination of prior knowledge and trial-and-error. Such an approach will sometimes be seen described as an ‘optimization’ of said products, but we will here focus on the formal mathematical approach of ... En savoir plus

Simulation of a Hybrid (Active/Passive) Acoustic Measurement Room

R. Boulandet1, M. Allado1, C. Pinhède2, E. Friot2, R. Côte2, P. Herzog3
1HES-SO, Geneva, Switzerland
2LMA, Marseille, France
3ARTEAC-LAB, Marseille, France

The ideal way to measure the acoustic performance of heavy items such as vehicles or machines is in a semi-anechoic chamber, i.e. in an environment with no reflections except from the solid floor where the noise source is standing. To accurately measure low frequencies down to 20 Hz ... En savoir plus

Evaluation of the Ray-Tracing and Pressure Acoustic Solvers for Audio Simulations in a Vehicle

F. Malbos1, M. Bogdanski2, J.W. Kim3, M. Olsen4
1Harman France, Paris, France
2Harman International Industries, Garching, Bavaria, Germany
3Harman International Industries, Northridge, California, USA
4Harman International Industries, Struer, Denmark

For automotive applications, acoustical simulation methods are used to optimize the position and orientation of the loudspeakers to get the best audio system performance. The goal of the presented paper is to evaluate the accuracy of the Pressure Acoustics interface (Finite Element, wave ... En savoir plus

Designing a Structural Fastener Assembly Resistant to Vibrational Stress Using COMSOL Multiphysics®

Virgil MESLE1, Jean-David WHEELER2, Marc JOUAN1, Vincent BRUYERE2
1RAKON, Pont-Sainte-Marie, FRANCE
2SIMTEC, Grenoble, FRANCE

RAKON is a worldwide expert in high performance crystal oscillator. The company decided to expand its product range to larger space equipment, the Master Reference Oscillator (MRO). This product is composed of stacked mechanical modules, joined together by structural screwed assemblies. ... En savoir plus

Acoustic Propagation Model in 3D of Dolphin Echolocation Formation Inside Head Tissues

Josefin Starkhammar1, Lorenzo Grassi1, James Finneran2, Jason Mulsow3, Dorian S. Houser3
1Lund University, Faculty of Engineering, Department of Biomedical Engineering
2U.S. Navy Marine Mammal Program
3National Marine Mammal Foundation

Introduction The echolocation signals of dolphins consist of forward-projected sound pulses that reflect off objects and are used to probe underwater surroundings. Despite rigorous studies of dolphin echolocation, there remain questions about how echolocation sounds are produced and ... En savoir plus

Acoustic-Mechanic Modeling of Polydimethylsiloxane in the MHz Regime for Metamaterials Applications

Lucrezia Maini1, Prof. Christofer Hierold1, Dr. Cosmin Roman1
1Micro- and Nanosystems, ETH Zurich, 8092, Zurich, Switzerland

Polydimethylsiloxane (PDMS) is a biocompatible material widely used in biomedical applications such as implantable sensors. A realistic modeling of PDMS in acoustic-mechanic simulation is useful especially for medical applications which use ultrasonic waves as interrogation source. ... En savoir plus

Optimization of Loudspeakers

A.J. Svobodnik1, T. Nizzoli 1, F.L. Redl 1
1Mvoid Group, Karlsruhe, Germany

Loudspeakers, specifically electrodynamic transducers with enclosures, are used almost everywhere in our life. Transportation of acoustic information is vital for humans since the very beginning of the human evolution. Hence, reproduction of acoustics has a long tradition in engineering ... En savoir plus

Acoustic manipulation capabilities of a multifrequency AlN based PMUT

Bart Weekers1
1Imec / KU Leuven, Leuven, Belgium

Contactless manipulation of microscopic objects through acoustic waves has proven an attractive solution for several applications over the past decades. This modality is particularly interesting for the manipulation of bio-particles (BPs) due to its relatively low intensities, capability ... En savoir plus

Electrode design for efficient excitation of vibrational modes in an AlN based PMUT

Bart Weekers1, M. Billen2, D. Tabruyn3, R. Haouari2, P. Gijsenbergh2, V. Rochus2, X. Rottenberg2, L. Lagae3
1Imec / KU Leuven, Leuven, Belgium
2Imec, Leuven, Belgium
3Imec & Department of Physics and Astronomy, KU Leuven, Leuven, Belgium

Piezoelectric micromachined ultrasound transducers (PMUTs) are gaining increasing interest as miniaturized, low-power devices which can be easily integrated with electronic systems for applications such as medical imaging, therapeutic ultrasound, and particle manipulation. This work ... En savoir plus