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

Simulation of Microfabricated Linear Ion Trap

J. Heinonen[1], M. Erdmanis[1], I. Tittonen[1]
[1]Aalto University, Department of Micro- and Nanosciences, Espoo, Finland

We present a simplified 3D model that simulates the operation of a linear microscale integrated ion trap. It employs a set of metalized electrodes, which are formed on top of an insulator layer on silicon substrate. The confinement in all three dimensions is provided by the application of the specific AC and DC voltages to the corresponding trap electrodes. The distribution of the trapping ...

Modelling Of Magnetoelectric Effects In Magnetostrictive/Piezoelectric Multi-Layers Using A Multiphysics Simulator

F. Rasoanoavy[1], V. Laur[1], R. Smaali[2], and P. Queffelec[1]
[1]University of Brest Lab-STICC, Brest, France
[2]Clermont Université, Université Blaise Pascal, Cleremeont-Ferrand, France

In this paper, we use COMSOL, finite element software, to compute the magnetodielectric effect in a multiferroic structure based on a {ferromagnetic /piezoelectric} multi-layer. We also investigate the potential tunable applications of such structures at microwave frequencies. In a first part, we present the piezoelectric and magnetostrictive equations which were then used to develop the global ...

Using COMSOL Multiphysics in Eddy Current Non Destructive Testing Context

L. Santandrea, and Y. Le Bihan
Laboratoire de Génie Electrique de Paris, Gif-sur-Yvette, France

Eddy current testing (ECT) is widely used to check the integrity of electrically conducting parts and notably to detect flaws. It is based on the interaction between a probe and the part under testing. The finite element method (FEM) is well fitted to the modelling of these kinds of problems because of its large flexibility which allows to deal with complex probe and part configurations. In this ...

Traveling Plasma Wave Levitation of Objects Supported by Coanda Effect - new

R. Eisenschmid[1]
[1]OPTIMA pharma GmbH, Schwäbisch Hall, Germany

Electrostatically excited plasma waves can induce a “plasma wind” in the surrounding media or air. The lifted object has a shape of a flying saucer, just for better illustration. A travelling plasma wave propulsion requires a pre-ionized media around the surface and a travelling electrostatic field. A simplified plasma model was used to set up an EFD (electro fluid dynamic) approach into a ...

Simulation of the Impedance Response of Materials with More Than One Electrical Path

R. A. Gerhardt [1], Y. Jin [1],
[1] Georgia Institute of Technology, Atlanta, GA, USA

1. Introduction Polycrystalline single phase materials often display electrical properties that are a function of their grain size. Impedance spectroscopy, an alternating current technique is ideal for detecting the presence of more than one current path and has been used for many years[1,2]. However, it is proposed here that it may be possible to use concepts developed for two phase ...

RFID-Enabled Temperature Sensor

I.M. Abdel-Motaleb[1], K. Allen [1]
[1]Department of Electrical Engineering, Northern Illinois University, DeKalb, IL, USA

The design of a RFID-enabled temperature sensor is described in this paper. In this sensor, a change in temperature causes structural beams to bend, which results in a proportional displacement of the plates of the capacitor. Plates\' displacement results, in turn, in changing the value of its capacitance. The capacitor of the sensor is coupled to the LC resonant network of a passive RFID tag. ...

Anisotropic Heat Transfer in Orthocyclically Wound Coils

T.L. van Vuure[1]
[1]Tecnotion B.V., Almelo, The Netherlands

Tecnotion produces linear motors for the high tech automation and semiconductor markets. Orthocyclically wound coils give the best performance because the largest number of windings can be packed into a given volume, as opposed to "wild winding", where the windings fall where they may. Additionally, the anisotropic heat conduction perpendicular to the wire direction is optimized because each ...

Estudo Numérico da Eletroquimioterapia em Tumor Cutâneo com Diferentes Configurações de Eletrodos - new

G. Neves[1], D. Suzuki[1], J. Alvim[1], M. Rangel[2]
[1]Universidade Federal de Santa Catarina, Florianópolis, SC, Brasil
[2]Vet Câncer Oncologia Veterinária, São Paulo, SP, Brasil

A eletroquimioterapia é um tratamento de câncer que utiliza a combinação de agentes quimioterápicos e campos elétricos. A base teórica por trás dessa aplicação é a eletroporação. Esse fenômeno biológico consiste na abertura de poros na membrana celular devido à aplicação de pulsos elétricos. Este trabalho analisa o comportamento do campo elétrico gerado por pulsos elétricos aplicados em ...

Three-Dimensional Modeling of Electrical Scanning Probe Microscopy Problems

G. Gomila [1], L. Fumagalli [2], R. Fabregas [3],
[1] Institut de Bioenginyeria de Catalunya (IBEC), Departament d’Electrònica, Universitat de Barcelona, Barcelona, Spain
[2] School of Physics and Astronomy, University of Manchester, Manchester, United Kingdom
[3] Institut de Bioenginyeria de Catalunya (IBEC), Universitat de Barcelona, Barcelona, Spain

Electrical scanning probe microscopy (SPM) techniques, such as electrostatic force microscopy, nanoscale impedance microscopy or scanning near field microwave microscopy, are a relatively new branch of microscopy techniques that can generate images of the nanoscale electrical properties of samples (conductivity, permittivity, charge, etc.). These techniques scan the surface of a sample ...

Evaluation Of AC Loss And Temperature Distribution In High Temperature Superconducting Tape Using COMSOL Multiphysics

G. Konar, and N. Charaborty
Jadavpur University, Kolkata, West Bengal, India

High temperature superconductors (HTS) are promising candidates for electrical power applications. However, the superconductors exhibits energy loss known as AC loss when exposed to time varying external magnetic field and/or transport current. In this paper, AC loss in an elliptical Ag sheathed Bi2223 (HTS) tape is calculated using the time dependent PDE mode of COMSOL Multiphysics. The HTS ...