Technical Papers and Presentations

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.

On The Modelling Of Electrowetting Using COMSOL Multiphysics

J.F. Dannenberg, J. Brinkert, and E.A.D. Lamers
Reden b.v., Hengelo (ov.), The Netherlands

One of the upcoming technologies in displays is that of the electrowetting displays. A surface can be covered by a colored oil or transparent water using a voltage to increase or decrease the wettability of the surface. A simulation of the behavior of such a thin film of oil in water, forced to move due an electrostatic field, has been made using the level-set, two-phase flow application mode ...

Improvements in the Modeling of the Self-ignition of Tetrafluoroethylene

M. Beckmann-Kluge, F. Ferrero, V. Schröder, A. Acikalin, and J. Steinbach
Federal Institute for Materials Research and Testing, Technical University, Berlin, Germany

Tetrafluoroethylene (TFE) is a gas widely employed in industry, which can under specific circumstances experience an exothermic dimerization to octafluorocyclobutane. If the heat generated by this reaction cannot be dissipated to the surroundings, the temperature inside the reactor will continue rising, leading to conditions where TFE can decompose in tetrafluoromethane and carbon black. This ...

Simulation of Photonic Crystals Particle Filling by Electrospray

A. Coll, V. Di Virgilio, S. Bermejo, and L. Castañer
Universitat Politècnica de Catalunya, Barcelona, Spain

Photonic crystals are widely used in optical applications as waveguides and band filters. Filling the periodic structural material of photonic crystals with other materials is very useful in order to change the optical properties of the devices. In this paper electrostatic COMSOL simulations describing an electrospray deposition of particles in macroporous structures are performed.

Modelling the Effects of Temperature and Moisture Ingress on Capacitance and Dissipation Factor Measurements within Oil Impregnated Paper Transformer Bushings

D. Smith, S.G. McMeekin, B.G. Stewart, and P.A. Wallace
Glasgow Caledonian University, Glasgow, Scotland, United Kingdom

The majority of power transformer high voltage bushings today are of the condenser oil impregnated paper (OIP) type. The ingress of moisture, through the deterioration of the bushing over time, can result in a significant reduction in life and is a major failure mode of these bushings. Currently, the measurement of capacitance and dissipation factor is the most common method used to assess the ...

Modelling and Analysis of Acoustic Emissions and Structural Vibration in a Wind Turbine

B. Marmo, and B. Carruthers
Reactec Ltd., Edinburgh, United Kingdom

The onshore wind turbine industry must overcome many technical, commercial, and environmental difficulties. A significant element for planning consent is operational noise. Acoustic limits are strictly enforced and can lead to near-neighbour complaints as well as contractual disputes. Reactec have diagnosed, analysed and solved a problematic tonal resonance for a major wind turbine generator ...

Thermal FEM Simulation Of A Multilevel Lab On Chip Device For Genetic Analysis

E. Giuri, A. Ricci, and S.L. Marasso
Politecnico di Torino, Materials Science and Chemical Engineering Department, Turin, Italy

In this work, time dependent thermal analyses, performed on the 3D FE model of a multilevel Lab on Chip (LOC) platform are executed in order to gain insight into the temperature distribution within the device. By means of the COMSOL Multiphysics CAD import module, an extremely close 3D reproduction of the actual device, allowing to probe temperatures in those regions where an experimental ...

Ultrasound Piezo-Disk Transducer Model For Material Parameter Optimization

L. Spicci, and M. Cati
Esaote SpA, Florence, Italy

The technology involved in high performance ultrasound imaging probes needs a reliable model to help in new projects development and performance simulations. To achieve a useful model, it is necessary to use correct values for all material parameters involved in the electro-acoustical performances of the piezoelectric material, but unfortunately some of these parameters are known only with high ...

Active Infrared Technique for Landmine Detection: Numerical and Experimental Results

P. Fallavollita[1,2], S. Esposito[1,2], and M. Balsi[1,2]
[1]Dipartimento di Ingegneria dell’Informazione, Elettronica e Telecomunicazioni, “La Sapienza” University, Rome, Italy
[2]Humanitarian Demining Laboratory, Cisterna di Latina, Italy

Landmines are an open problem in many countries of the world. They cause injuriesand death and no technique proposed to date guarantees fast and 100% reliable detection alone. To this purpose, at the Humanitarian Demining Laboratory of “La Sapienza” University of Rome, several solutions are being studied. In this paper, numerical simulations of a prototype thermal detection system are ...

Effective Thermal Conductivity of Composite: Numerical and Experimental Study

M. Karkri
Université Paris-Est, CERTES, Créteil Cedex, France

In this paper, thermal properties of composites are investigated numerically and experimentally. In the numerical study, finite-elements method in COMSOL is used to modelize heat transfer and to calculate the Effective Thermal Conductivity (ETC) of the composite for three elementary cells, such as simple cubic (SC), body centered cubic (BCC) and face centered cubic (FCC). The effect of the filler ...

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 ...

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