Articles techniques et présentations

The aim of the present work is to explore through the developed numerical model the separation of exosomes from a more complex mixture of particles i.e. red blood cells and white blood cells, through combined acoustofluidics and fluid relocation in a bulk acoustic wave microfluidic ... En savoir plus

The effects of an auxiliary resonating chamber in an in-ear headphone were simulated using COMSOL Multiphysics®. The auxiliary resonator consists of a rubber attachment that can be added to an in-ear loudspeaker. The purpose of the resonator is to increase the low frequency performance ... En savoir plus

Ultrasound transducers are regularly used in medical clinics but their performance is known to deteriorate over time. Causes of this image quality degradation can include delamination between layers, physical breakage of components, short circuits and weakening crystals. Regular ... En savoir plus

High power, air-coupled ultrasound has gained significant interest from the research community due to the rise in applications such as non-contact particle manipulation, haptic feedback, and sound steering. A growing number of researchers are utilizing transducers designed for proximity ... En savoir plus

Focused ultrasounds are used in many medical applications as a treatment: it is important to evaluate the induced effects of such a procedure to achieve a high accuracy while keeping the untargeted surrounding areas safe. In the present paper, COMSOL Multiphysics®, a simulation software ... En savoir plus

Wind turbine towers can often become modal if matched closely in frequency with the excitation associated with rotating components in the drive train, such as gearboxes and generators. When these conditions are met, the modal response is greatly amplified due to the very low structural ... En savoir plus

The impedance tube is commonly used to characterize sound absorbing material. In order to obtain reliable results, the sample must fit perfectly into the cross section of the tube. In practice, this often results in a minimal gap between the sample and the wall of the tube. A narrow gap ... En savoir plus

Many industrial applications require special treatments for fluid products, such as: deagglomeration, dispersion, homogenization, emulsion, special mixing or even catalysis of chemical reactions. Such effects can be obtained through cavitation in a closed ultrasonic reactor, in which it ... En savoir plus

IntroductionThe application of power ultrasounds in food dehydration processes have shown a good performance in terms of efficiency, energy reduction and quality of the final product, allowing also a reduction in the convective drying kinetics, and at lower temperatures than conventional ... En savoir plus

Fouling accumulation in pipelines is a known problem in industry which is currently treated by mechanical, hydraulic and chemical means. Each requiring a halt in the production to carry out the procedure. Industry requires a method that is non-invasive and can be used in-situ, Ultrasonic ... En savoir plus