Articles techniques et présentations

Numerous sensors based on various sensing principles are used to measure pressures and temperatures in wellbores. Of all these sensors, piezoelectric quartz is the most preferred means of sensing pressure and temperature and is probably the only sensor to meet stringent downhole ... En savoir plus

Fluid flow has the potential to provide significant mechanical energy input for electromagnetic energy harvesters. The effect of a bluff body, such as cylinder played a significant role in the creation of a Karman vortex profile in the fluid flow. We study the effect of the number and ... En savoir plus

We have simulated the ultrasound-induced acoustophoretic motion of microparticles suspended in an aqueous solution. The full first-order thermoviscous acoustics equations have been implented on a rectangular microfluidic 2D domain excited with an ultrasound field tuned to resonance near ... En savoir plus

This paper presents finite element method (FEM) simulation study of the generation of bulk acoustic waves (BAWs) and their effect on the performance of surface acoustic wave (SAW) devices, using COMSOL Multiphysics. A SAW delay line structure using YZ-cut lithium niobate substrate is ... En savoir plus

In this work, we seek to simulate SAWs for a better understanding and to benchmark the currently available cloud computing possibilities of COMSOL Multiphysics® software. By using the MEMS module we demonstrate 3D models with reduced geometry to achieve principle information about the ... En savoir plus

In this project, we report a design of MEMS microphone that is based on the application of porous silicon in improving the sensitivity of bulk micro machined capacitive pressure sensors. The property of a low Young’s modulus of porous silicon and its dependence on porosity have been ... En savoir plus

In semiconductor gas sensors, the base of the gas detection is the interaction of the gaseous species at the surface of the semiconducting sensitive material. Since the chemical reactions at the surface of the sensor material are functions of temperature. We simulate our µHeater design ... En savoir plus

电阻抗成像（EIT）技术由于分辨率较低受到专家学者的诟病，而EIT与超声技术两者的结合以及 EIT 与磁共振技术两者的结合可以提高成像的分辨率，但仍分别存在电极射频屏蔽效应以及分辨率难以进一步提高等问题。本文将磁共振成像技术和磁声电技术优势互补，采用低频振动进行激励，提出了一种新的动电成像方法，并采用 COMSOL 软件建立了二维仿真模型，使用 PDE 模式对动电阻抗成像的正问题进行了仿真研究，利用 COMSOL 的仿真结果结合Matlab软件进行了反演，实验结果可以反映出仿真模型内部的电导率分布，能够解决上述电阻抗成像结合技术存在的问题。 En savoir plus

There is a practical interest among composite materials manufacturers to high-speed accurate non-destructive evaluation (NDE) technology for voids inspection when these voids are natural components of such complex structures like resin insulated layer of double-sided copper-clad ... En savoir plus

Shear wave elastography is an innovative technique used in combination with the traditional ultrasound imaging to improve the specificity of cancer imaging. A two-dimensional finite element model (FEM), composed of realistic boundary conditions, was developed in COMSOL Multiphysics® to ... En savoir plus