Here you will find presentations given at COMSOL Conferences around the globe. The presentations explore the innovative research and products designed by your peers using COMSOL Multiphysics. Research topics span a wide array of industries and application areas, including the electrical, mechanical, fluid, and chemical disciplines. Use the Quick Search to find presentations pertaining to your application area.

COMSOL在压阻式柔性压力传感器中的应用

王宗荣 [1,2], 王珊 [1],
[1] 浙江大学,杭州,中国
[2] 香港大学,香港,中国

引言:柔性压力传感器在电子皮肤、智能假肢以及医疗监测诊断等领域发挥着十分重要的作用。因此压力传感器需要很高的灵敏度、较宽的敏感区间及稳定的性能。利用典型有机硅 PDMS 作为支撑层,聚合物 PEDOT: PSS 作为导电感应层制得的高度不均一微突结构的双压敏机制压阻传感器灵敏度达到了 851kPa-1。其探测范围广,性能优异,为解决目前压阻传感器中灵敏度低、敏感压力区间窄的难题提供了新思路。 COMSOL MULTIPHYSICS® 软件的使用:本文利用 COMSOL Multiphysics® 软件建立了不均匀微突结构的压阻式传感器模型,采用了结构力学与电流场两个物理场,通过电子接触对进行多物理场的耦合。研究在指定位移情况下,压阻式传感器电阻与电流的变化,从而得到灵敏度,验证不均匀微突结构压阻式压力传感器的双作用机制。同时,与均一微金字塔结构的压力传感器进行比较 ...

Design for Reliability and Robustness through Probabilistic Methods in COMSOL Multiphysics with OptiY

T.-Q. Pham[1], H. Neubert[2], and A. Kamusella[2]
[1]OptiY e.K., Aschaffenburg, Germany
[2]Institute of Electro-Mechanical and Electronic Design, TU Dresden, Germany

One challenge in designing micro-electromechanical systems (MEMS) is considering the variability of design parameters caused by manufacturing tolerances and material properties. The function of MEMSs is significantly influenced by this variability, which can be represented in terms of statistical variables. In order to involve statistical design parameters into the design optimization process, ...

Towards the Modeling of Microgalvanic Corrosion in Aluminum Alloys: the Choice of Boundary Conditions

N. Murer[1], N. Missert[2], and R. Bucchheit[1]

[1]Fontana Corrosion Center, Ohio State University, Columbus, OH, USA
[2]Sandia National Laboratories, Albuquerque, NM, USA

Aluminum alloys in near-neutral, mildly aggressive solutions, undergo damage accumulation during corrosion, mostly due to the presence of micrometer-sized constituent intermetallic particles (IMP) that create a microstructural discontinuity at which localized corrosion occurs. The Nernst-Planck equation with electroneutrality is used to simulate current and pH distributions resulting from ...

Ignition Process of Microplasmas

H. Porteanu, and R. Gesche
Ferdinand-Braun-Institut für Höchstfrequenztechnik, Berlin, Germany

Microplasmas at atmospheric pressure are required in many applications, where treatments in normal ambient, with spatial resolution, are important. The interest on such miniaturized sources has increased due to the availability of a new generation of microwave sources based on high power GaN transistors. The present work deals with a simulation of the plasma formation after the application of ...

Numerical Simulation of Granular Solids’ Rheology: Comparison with Experimental Results

A. Zugliano[1], R. Artoni[2], A. Santomaso[2], A. Primavera[1], M. Pavlicevic[1]
[1]Danieli & C. Officine Meccaniche, Italy
[2]DIPIC - Universita di Padova, Italy

A simulation of the behavior of bulk solids continuously flowing through a silo with internal flow feeders has been performed by means of a dissipative hydrodynamic model. The results obtained by these calculations and those found experimentally agree, not only with regard to the velocity profiles, but also relative to the pressure on the silo walls. The dissipative hydrodynamic model represents ...

On Boundary Conditions for CSEM Finite Element Modeling, I

J. Park[1], T. Bjornara[1], H. Westerdahl[2], and E. Gonzalez[2]
[1]Norwegian Geotechnical Institute (NGI), Oslo, Norway
[2]StatoilHydro Research Center, Norway

In this study, we propose an absorbing boundary domain (or condition), which is really simple but still efficient for the 2.5D finite element (FE) analysis. The main application is to simulate the electromagnetic (EM) waves related to the marine controlled source electromagnetic (CSEM) method, where the EM wave propagates with extremely low frequency in the conductive media. In the near future, ...

Two-dimensional Analysis of Triple Coupled Physics of Structural Mechanics, Diffusion and Heat Transfer in a Gas Pipe

P. Lee-Sullivan[1], and M. Haghighi-Yazdi[1]
[1]Department of Mechanical and Mechatronics Engineering, University of Waterloo, Waterloo, Ontario, Canada

In this study, a 2-D model has been built using COMSOL Multiphysics® to analyze a triple coupled physics problem involving simultaneous gas diffusion, heat transfer, and structural mechanics in a pipe due to the flow of high-pressure carbon dioxide. The problem geometry and boundary conditions were based on the analysis by Rambert et al. who have published the most advanced modeling work in ...

The Fabrication of a New Actuator Based on the Flexoelectric Effect

S. Baskaran[1], S. Thiruvannamalai[1], N. Ramachandran[1], F.M. Sebastian[1], and J.Y. Fu[1]
[1]State University of New York at Buffalo, Buffalo, New York, USA

This paper presents a novel methodology towards the design, analysis, and the fabrication process involved in developing a cost effective method to create a piezoelectric actuator by means of the flexoelectric effect. The basic physical equations of the flexoelectric effect and the qualitative analysis of the flexoelectric actuator are done using COMSOL Multiphysics. This effect is used to align ...

Control of Systems Modeled by COMSOL Multiphysics® as Distributed Parameter Systems

G. Hulkó[1], C. Belavý[1], P. Bucek[1], K. Ondrejkovic[1], and P. Zajícek[1]

[1]Institute of Automation, Measurement and Applied Informatics of Slovak University of Technology, Bratislava, Slovak Republic

In systems and control theory dynamical systems described by partial differential equations are known as distributed parameter systems. So for modeling and dynamical analysis of distributed parameter systems wide possibilities are offered by COMSOL Multiphysics® based on numerical solution of sets of partial differential equations by finite element method. Paper presents actual possibilities ...

A Study of Distributed Feed-Back Fiber Laser Sensor for Aeronautical Applications Using COMSOL Multiphysics

I. Lancranjan[1], C. Gavrila[2], S. Miclos[3], and D. Savastru[3]
[1]Advanced Study Centre - National Institute for Aerospace Research Elie Carafoli, Bucharest, Romania
[2]Technical University of Civil Engineering Bucharest, Romania
[3]National Institute R&D of Optoelectronics, INOE 2000, Bucharest, Romania

Distributed Feedback Fiber Laser (DFB-FL) sensors are increasingly used in aeronautical applications. One of the newest such applications consists in detecting the “transition” zone between laminar and turbulent air flow upon the extrados surface of an aircraft wing. In this specific application DFB-FL are operated as air pressure sensors monitoring amplitude variations of ~1 Pa (laminar flow) ...