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 News Magazine 2017

Coupled Electromagnetic - Dynamic FEM Simulation of A High Frequency MEMS Energy Harvester

E. Topal
Middle East Technical University

In this study, a detailed finite element model coupling the motion dynamics and electromagnetics of a diaphragm based MEMS vibration energy harvester is presented. The energy harvester converts low frequency vibrations to high frequency response by magnetic actuation of a diaphragm carrying coils. AC/DC, Solid Mechanics and Moving Mesh (ALE) modules are coupled together in one 3-D model to ...

Variable Capacitance And Pull-In Voltage Analysis Of Electrically Actuated Meander-Suspended Superconducting MEMS

N. AlCheikh[1], P. Xavier[1], J.M. Duchamp[1], C.H. Boucher[2], and K. Schuster[2]
[1]Institute of Microelectronics, Electromagnetism and Photonics (IMEP-LAHC), Minatec, Grenoble, France
[2]Institute of Millimetric Radio Astronomy (IRAM), Grenoble, France

Variable capacitors between the fF and pF range are very interesting for high frequency applications like variable filters, resonators, etc. For radio astronomy applications variable capacitors, realized by electrostatically actuated, micromechanical Meanders-suspended bridges (MEMS) made of superconducting Niobium, have been measured to find C(V). A non plane capacitance behavior have been ...

Capacitive Accelerometer Characteristics Study

B. S. Kavitha[1], S. B. Rudraswamy[1], C. R. Venugopal[1]
[1]SJCE, Mysore, Karnataka, India

This paper will describe the dependence of capacitive accelerometer characteristics on the accelerometers physical dimension and its material properties. The sense element of the accelerometer is designed on the basis of a commercially available torsion based accelerometer technology. The sense element consists of an asymmetrically shaped flat plate of metal supported above a substrate surface ...

Modelagem Computacional de Difusores para Microbombas

A. G. S. Barreto Neto [1], A. M. N. Lima [2], C. S. Moreira [1],
[1] Instituto Federal de Ciência e Tecnologia - IFPB, João Pessoa, PB, Brasil
[2] Universidade Federal de Campina Grande - UFCG, Campina Grande, PB, Brasil

Este trabalho trata do dimensionamento da estrutura bocal/difusor utilizando a simulação computacional com fronteira móvel. Esse tipo de simulação contempla toda estrutura da bomba, isto é, câmara de bombeamento, difusor e área de dispersão de fluxo, de modo a contabilizar o refluxo em função da estrutura, possibilitando um projeto mais realísticos da estrutura.

Finite Element Model of Surface Acoustic Wave Scattering with High-Aspect-Ratio Irregularities

S. Iuliia [1], Y. Sergey [1], K. Sergey [1], P. Alexey [1],
[1] Saratov State University, Saratov, Russia

The design of surface acoustic wave (SAW) devices needs the accurate study of the scattering fields, arising from the interaction of SAW with periodic irregularities placed on a surface of crystal to form interdigital transducers or reflective structures (RS). To solve this problem, the finite element methods are very perspective, because they allow to take into account the actual geometry of ...

Simulation of Piezoelectrically Actuated Drug Delivery Device for Biomedical Application

J. Dsa[1], Manisha[1], M. Goswami [1], B.R Singh [1],
[1] Indian Institute of information technology Allahabad, Allahabad, Uttar Pradesh, India

We have developed a piezoelectrically controlled MEMS drug delivery device for on-demand release of defined quantities of drug. A drug-loaded micro reservoir (∅6mm×550µm) is sealed by A membrane placed over the drug reservoir on which the piezoelectric material is deposited. On application of voltage across this piezoelectric material , the membrane deflects allowing the fluid to fill into the ...

Designing the Actuator for the Next-Generation Astronomical Deformable Mirrors: a Multidisciplinary and Multiphysics Approach

C. Del Vecchio[1], R. Biasi[2] , D. Gallieni[3], and A. Riccardi[1]

[1]INAF-OAA, Fierenze, Italy
[2]Microgate Srl, Bolzano, Italy
[3]ADS International Srl, Valmadrera, Italy

The actuation system of the deformable mirror is one of the crucial components of an Adaptive Optics unit. One possible implementation comprehends a linear force motor and a capacitive sensor providing the feedback measure signal. Choosing a magnetic circuit that makes optimum use of the magnetic force delivered by a current and properly arranging the electrostatic geometry allows to obtain very ...

Design and Simulation of MEMS Based Gyroscope for Vestibular Prosthesis

R. Nithya[1], K. Kavitha[1], R. K. Shahana[1], A. Gupta[1], M. Alagappan[1]
[1]Department of Biomedical Engineering, PSG College of Technology, Coimbatore, Tamilnadu, India

The primary function of the vestibular system is to provide the brain with information about the body\'s motion and orientation. The absence of this information causes blurred vision and spatial disorientation, vertigo, dizziness, imbalance, nausea, vomiting, and other symptoms often characterize dysfunction of the vestibular system. Our aim is to design vestibular prosthesis using COMSOL ...

Multiple-Mode Polymeric-Silicon Dual-Channel Gas Sensors

K. Liang [1], A. Dodabalapur [1], D. Sharma [1],
[1] Microelectronics Research Center, University of Texas, Austin, TX, USA

An organic-inorganic dual-channel sensor makes a strong chemical gas sensor because this device design combines the high chemical sensitivities and selectivity of organic semiconductors [1-4] with the superior electrical performance and convenient integration of silicon semiconductors. As shown in the device schematic in Figure 1, the organic channel is the chemically-active material and is ...

Interactive Design of an Electrostatic Headphone Speaker Using COMSOL Server™

B. A. Marmo [1], M. P. Snaith [1],
[1] Xi Engineering Consultants, Edinburgh, United Kingdom

An electrostatic headphone includes many interrelated design elements that affect the frequency response of the headphone and the users listening experience. Xi Engineering Consultants (XI) partnered with Warwick Audio Technologies (WAT) to investigate the complex behavior of one-side electrostatic speakers. Xi developed a GUI that helped WAT engineers optimize their speaker using virtual tools ...