Consultez les proceedings de la Conference COMSOL 2020
Prediction of Thermoacoustic Instabilities in Combustion Systems - Application to a Simplified Model of a Domestic Boiler
The reduction of NOx emissions in combustion systems like domestic boilers, gas turbine combustors, industrial burners, etc., can be achieved by using lean premixed combustion technologies. One of the major concerns in the operability of such systems is their susceptibility to ... En savoir plus
Boundary Element Method Simulation of Tonal Noise from a Wind Turbine
Modeling the acoustic output of wind turbines presents extreme simulation challenge due to the geometry of rotors and towers requiring very large mesh size with large volumes of empty space between blades. In this paper, the structural-acoustic finite element models that were previously ... En savoir plus
Numerical Modeling of Viscous Damping for Acoustic Resonances of Suspended Microparticles
Introduction In this study, we investigate the damping mechanisms of particle resonances in acoustofluidic systems using the finite element framework of COMSOLTM. In the field of acoustic micro-manipulation, pressure waves are used for the contactless handling of micro-meter sized ... En savoir plus
A Simulation Test Bench for Decay Times in Room Acoustics
An important yet rarely explored problem in room acoustics is how to correlate the decay times of modal resonances to the acoustic properties of the boundaries (walls). The room response is often described by reverberation times, but the reverberation model breaks down at low frequency, ... En savoir plus
Simulation Absorption Curves on Acoustic Panel With Front Textiles ISO 354
KVADRAT SOFTCELLS A/S, COMSOL A/S AND RESOLVENT P/S APPLICATION CREATED BY RESOLVENT FOR SIMULATING ABSORPTION CURVES ON ACOUSTIC PANELS WITH FRONT TEXTILES AND ACOUSTIC INSULATION FOLLOWING THE INTERNATIONAL STANDARD ISO 354 FOR MEASURING SOUND ABSORPTION. In Kvadrat Soft Cells we ... En savoir plus
Multiphysics Simulation of a High Frequency Acoustic Microscope Lens
High frequency ultrasound (100-1000 MHz) has been used in microscopy since the 1970s. The main imaging component, the acoustic lens, is commercially available. The resolution, working distance, and focal length depend on the structure of a lens, which is unique for each produced lens. ... En savoir plus
Development of a Wideband Steerable Acoustic Metasurface with COMSOL®
The recent introduction of acoustic metamaterials and metasurfaces in the literature has triggered an tremendous interest in the scientific community, with their capability to achieve extraordinary acoustic properties for various acoustic and noise control applications, although limited ... En savoir plus
Fully Symmetrical Single-Suspension Electrodynamic Loudspeaker Using a Halbach Array
Invented at the end of the XIXth century, the electrodynamic loudspeaker has not much changed since then. Although the materials have greatly evolved, the geometry and the transduction principle have remained the same. However, in many applications, the bulkiness of the driver behind the ... En savoir plus
Sound Field Reconstruction in Low-Frequency Room Acoustics: A Benchmark Study with Simulation
When it comes to room acoustic design, it is of paramount importance to be able to assess the sound field distribution inside a room, in order to identify and optimally locate the corrective measures. Generally, an accurate depiction of the sound field would result in an impractically ... En savoir plus
Tunable Flat-Plate Absorber Design for Active Sound Absorption
Noise reduction at low frequencies is a major issue in many workspaces and indoor public places. Unlike mid- and high-frequency noise, low frequency noise is less attenuated by using conventional sound absorbing materials. This communication proposes an electro-mechano-acoustic absorber ... En savoir plus