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.

An All-Purpose Full-Vectorial Finite Element Model for Arbitrarily Shaped Crossed-Gratings

G. Demésy[1], F. Zolla[1], A. Nicolet[1], and M. Commandré[1]
[1]Institut Fresnel, Université Aix-Marseille III, École Centrale de Marseille, France

We demonstrate the accuracy of the Finite Element Method (FEM) to characterize an arbitrarily shaped crossed-grating in a multilayered stack illuminated by an arbitrarily polarized plane wave under oblique incidence. To our knowledge, this is the first time that 3D diffraction efficiencies are calculated using the FEM. The method has been validated using classical cases found in the literature. ...

Fundamental Three Dimensional Modeling and Parameter Estimation of a Diesel Oxidation Catalyst for Heavy Duty Trucks

A. Holmqvist[1] and C.U.I. Odenbrand[1]

[1]Department of Chemical Engineering, Faculty of Engineering, LTH, Lund University, Lund, Sweden

Mathematical optimization can be used as a computational engine to generate the best solution for a given problem in a systematic and efficient way. In the context of monolithic converter systems, the parameter estimation problem (or inverse problem) is solved using Partial Differential Equations (PDE)-based models of the physical system coupled with an optimization algorithm. These problems are ...

Effects of the Film Thickness on the Transient Conjugate Opticalthermal Fields in Thin Films Irradiated by Moving Sources in Back and Front Treatments

N. Bianco[1], O. Manca[2], S.Nardini[2], and D. Ricci[2]

[1]DETEC, Università degli Studi di Napoli Federico II, Napoli, Italy
[2]DIAM, Seconda Università degli Studi di Napoli, Aversa, CE, Italy

A two dimensional transient analysis of the conjugate optical-thermal fields induced in a multilayer thin film structure by a moving Gaussian laser source is carried out numerically in order to compare back and front laser treatment processes. Thermal and optical nonlinearity is induced during transient heating, since the response of weakly absorbing thin films depends on temperature. The heat ...

Contactless Excitation of MEMS Resonant Sensors by Electromagnetic Driving

M. Baù[1], V. Ferrari[1], and D. Marioli[1]
[1]Department of Electronics for Automation, University of Brescia, Brescia, Italy

A contactless electromagnetic principle for the excitation of mechanical vibrations in resonant structures has been investigated. The principle relies on no specific magnetic property of the resonator except electrical conductivity and can be adopted for employing the structures as resonant sensors for measurements either in environments not compliant with the requirements of active electronics ...

Multiphysics Modelling of a Micro Valve

F. Bircher[1] and P. Marmet[1]

[1]Institute of Print Technology, Bern University of Applied Sciences, Burgdorf, Switzerland

Electromagnetic micro valves are currently developed empirically or the different physics are treated separately. To accelerate the development-process and for a better understanding of the overall system, a multiphysics simulation is built up. This simulation considers the electromagnetics, the electronics (including the control of the process), the mechanics and the fluidics with respect to ...

Two-Dimensional Modelling of a Non-Isothermal PrOx Reactor with Water Cooling for Fuel Cell Applications

H. Beyer[1], B. Schönbrod[1], C. Siegel[1], M. Steffen[1], and A. Heinzel[1][2]
[1]Zentrum für BrennstoffzellenTechnik GmbH, Duisburg, Germany
[2]Institut für Energie und Umweltverfahrenstechnik, University of Duisburg-Essen, Duisburg, Germany

This work treats of a preferential oxidation reactor, which is simulated by a two-dimensional axial symmetric model. The reactor serves as purification of hydrocarbon reformat and converts the CO mole fraction from up to 1 % in the feed gas down to a few ppm at the outlet to deliver a hydrogen rich feed gas for a PEM fuel cell. The model combined chemical kinetic expressions, which were ...

Energy Transformation Damping

G.S. Mulder[1]
[1]Leiden, The Netherlands

A model for material damping is presented in terms of internal friction and in terms of a variation of stiffness. In the latter case the idea is that the stiffness increases if elastic energy is stored and decreases if elastic energy is released. In case of a single mass spring system “stiffness” refers to the stiffness of the spring; in case of a continues object &ldquo ...

Cascades of Secondary Particles in High Voltage Accelerators

M. Cavenago[1], P. Antonini[1][3], P. Veltri[2], N. Pilan[2], V. Antoni[2], and G. Serianni[2]
[1]INFN-LNL, Legnaro, Padova, Italy
[2]Consorzio RFX, Padova, Italy
[3]Centro Ric. E. Fermi, Roma, Italy

A very simplified system for high voltage test is studied, considering reason for voltage holding failures which are not covered by conventional and local design criteria. A first understanding of the problem is obtained by solving the electrostatic potential in a 2D axis symmetric geometry, considering in detail the electrode shapes, and following a cascade of particle between opposite ...

A Finite Element Test of the 2002-2003 Etna Eruption

F. Pulvirenti[1][2], M. Aloisi[1], G. De Guidi[2], M. Mattia[1], and C. Monaco[2]
[1]Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Catania, Catania, Italy
[2]Dipartimento di Scienze Geologiche, Università di Catania, Catania, Italy

Structural, morphological and ground deformation studies suggest that the eastern flank of Mt. Etna (eastern Sicily) is spreading seaward. Three contrasting models have been proposed: deep-seated spreading, shallow sliding and tectonic block movements. In order to better understand the kinematics of instability processes on eastern flank of Mt. Etna, a numerical simulation has been applied to a ...

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