Articles techniques et présentations

The WaveEL buoy developed by the company Waves4power is characterized as a point absorber and has a 36 meters long vertical cylinder where a water-piston is oscillating due to induced motion from the waves. Estimating the wave loads on the piston is a challenge due to the presence of ... En savoir plus

Synthetic jet actuators enhance flow control by generating pulsatile jets with zero net mass flux. There is a need to develop a computationally inexpensive model that can generate optimal geometric actuator designs of maximum jet performance. This work investigates the multi-physics ... En savoir plus

In order to measure all possible rheological properties, a wide range of measuring systems is available for the Anton Paar Modular Compact Rheometer (MCR) series. Apart from the hundreds of measuring systems, which conform to the ISO, DIN and ASME Standards, every year several new custom ... En savoir plus

Damping is the liminting factor for the reachable maximum deflection. Thus, it is a very important issue for resonant microsystems. In this paper, we present a damping model for out-of-plane comb driven resonant micromirrors. The basic concept of this model is to attribute viscous ... En savoir plus

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

The analyzed MEMS oscillator is composed by a spring (beam) supported mass that needs to vibrate with a high Q-factor in the horizontal plane. Nevertheless, the transverse motion needs to be highly damped (low Q-factor). The purpose of the work was to explore different system ... En savoir plus

Large centrifugal compressors, which are commonly applied in the oil and gas and in the process industry, may fail due to vibrations of the impeller. These vibrations are induced by pressure pulsations in a compressor stage. These vibrations can be especially strong in so-called dense ... En savoir plus

This paper develops a computational model for determining the total damping coefficient for a unit cell of a MEMS microscale device containing a repetitive pattern of holes. The basic cell of the microstructure is approximated by an axi-symmetric domain and the velocity and pressure ... En savoir plus

Aerostatic bearings are widely employed in high-precision systems, particularly in micromachining applications. Their contactless operation eliminates mechanical friction, enabling highly accurate and repeatable motion. This makes them especially valuable in metrology and advanced ... En savoir plus

This paper introduces a multiphysics simulation framework for examining the impact of mechanical vibrations on lithium dendrite formation in lithium-ion batteries. We connected the lithium-ion battery, solid mechanics, and phase field physics interfaces using a custom model in COMSOL ... En savoir plus