Consultez les proceedings de la Conference COMSOL 2024
Finite element modelling of surgical transducers has been performed and is described. Ultrasonic transducers vibrating at around 25 kHz are used in orthopaedic surgery to cut bone. The high acoustic impedance of the metal blades used in these devices couples energy more efficiently to ... En savoir plus
We present here an architectured band-gap metamaterial, filtering mechanical waves in specific ranges of frequencies which, by its very specific geometry, challenges the simulation of linear elasticity problems including such elements. This unorthodox behaviour can be described as a ... En savoir plus
Thermal ablation is a treatment option in oncology that can be used to target primary and metastatic cancers. In this approach, high temperature heating is administered at the target tumor site to induce coagulative necrosis of malignant cells. One minimally invasive method for ... En savoir plus
Thermal ablation driven by an acoustic heat source has tremendous potential for the treatment of diseased tissue. In many applications, such as treating tumors in the liver, bulk removal of tissue is required, and thermal ablation can reliably cause necrosis for a relatively large tissue ... En savoir plus
Devices which scavenge energy from ambient mechanical sources such as human body movement and ocean waves are undergoing rapid research and development. Both triboelectric and piezoelectric effects have been employed in the design of such devices. In this work, we use the MEMS Module in ... En savoir plus
Surface Acoustic Wave devices are classic examples of Micro Electro Mechanical Systems (MEMS). These devices basically utilize inter-digitated electrodes (IDE) and a piezoelectric layer deposited over a substrate. The input IDT is supplied with alternating voltage and because of this, ... En savoir plus
Energy Harvesting methods are the most important area of Research since last decade, to bring forward the alternative methods for conventional power sources and generators at microscale and low powered devices. Most of these techniques use the ambient energy present in the environment ... En savoir plus
Piezoceramic crystals have broad application from simple strain measurement on cantilever beams, energy harvesting, and up to evolving areas of photonics. Lead Zirconate Titanate (PZT) ceramic slabs are used for generating modulation on fibers; fiber lasers etc for various applications ... En savoir plus
The expression <em>adaptive optics</em> was initially termed for the technology used in the telescopes to deform the mirrors to allow for phase correction of the incoming light. Soon, the adaptive optics was also implemented in microscopes, optical communication systems and ... En savoir plus
In heterogeneous catalysis, magnetic nanostructures have been mainly used as magnetically recoverable catalysts. Recently, we have shown that magnetic fields can be utilized to initiate polarization-driven catalytic reactions on surfaces of multiferroic nanoparticles (NP) via direct ... En savoir plus