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.

Benchmark between CPO (Charged Particle Optics) and COMSOL Multiphysics

J.-M. Barois, and C. Goulmy
PHOTONIS, Brive, France

Streak tubes are widely used in high-speed signal analysis; they give spatial, temporal and intensity information about one single event. Time resolutions of 0.7 pico-second can be achieved and in that time-domain, PHOTONIS tubes are second-to-none.Applications are numerous and range from plasma physic to femtosecond laser applications. In streak tubes, electrons move from the photocathode to the ...

Numerical Study of Surface Waves in Plasma

C. Hunyar, E. Räuchle, L. Alberts, R. Emmerich, M. Graf, M. Kaiser, and K.-D. Nauenburg
Dept. of Polymer Engineering/Microwave and Plasma, Fraunhofer-Institut Chemische Technologie (ICT), Pfinztal, Germany

Dense plasma can be produced by microwave (2.45 GHz) exited surface waves in a Plasmaline plasma source. This configuration allows one to generate large area plasmas (>1m2), which are well suited for technological applications, e.g., deposition of thin films, surface etching and cleaning in integrated circuit production, disinfection in medical applications, or plasma treatment of waste gases. ...

Electromagnetic Environment Generated in a TEM Cell for Biological Dosimetry Applications

M. Morega and A. M. Morega
Politehnica University of Bucharest, Bucharest, Romania

The dosimetric analysis of the non-ionizing electromagnetic field (EMF) penetration in exposed biological material requires the existence and monitoring of a controlled testing environment.The practical solution for high frequency EMF exposure is the setting of the experiment in an anechoic chamber, or, more economically, in a TEM cell that is able to provide a reduced testing region with EMF ...

Modeling Electromagnetic Wave Propagation in Planetary Cavities using COMSOL Multiphysics Tools

F. Simões
CETP/IPSL, Saint Maur des Fossés, France

The study of extremely low frequency electromagnetic wave propagation in the ionospheric cavities of celestial bodies in the Solar System follows an approach similar to that developed for the Earth. It contributes to the characterization of the atmospheric electric circuit and associated energy sources, and to the identification of the inner and outer cavity boundaries. A wave propagation, 3D ...

Perspectives of Thermo-electro-mechanical Micro Actuators for Micro Switch Applications: Design and Simulation

M. Matmat, M. Al Ahmad, and J. Y. Fourniols
Laboratoire d'Analyse et d'Architecture des Systèmes (LAAS-CNRS), Toulouse, France

In this work, thermo-mechanical simulations employing a 3D finite element analysis (FEA) of a current driven V-shaped actuator is presented. The structure's hot arms consist of polysilicon, which was used as the active material for deflection due to the Joule effect.COMSOL Multiphysics with stationary and parametric solvers was used to calculate the resulting deflection when current is applied. ...

Simulation of a Comb Drive for Fracture Lifetime Measurements

G. Somlay, Z. Szucs, A. Poppe, and M. Rencz
Budapest University of Technology and Economics, Budapest, Hungary

In this work, a finite element analysis is used to simulate electrostatically actuated comb drives operating under DC conditions (zero actuating frequency). A dynamic multiphysics model is developed using the arbitrary Lagrangian-Eulerian (ALE) formulation. The results show the coupled interaction between the electrostatic and mechanical domains of the transducer. The analysis is based on the ...

3-D Finite Element Modeling of Breathing Mode for Dry-Type Air-Core Reactors

L. Verbruggen1, J. Kotiniitty2, and M. Lehtonen1
1Power Systems and High Voltage Laboratory, Helsinki University of Technology, Helsinki, Finland
2Nokian Capacitors Ltd., Tampere, Finland

A crucial factor concerning modern reactors is a combination of laws and electro-technical rules defining appropriate produced sound levels. Currently, it is an important issue to reduce noise in order to fulfill all sound requirements. Noise results from reactor vibrations due to sinusoidal currents flowing through the reactor. The flowing currents induce electromagnetic fields which generate ...

Numerical Behavior of Different COMSOL Solution Methods for a Heat Transfer Problem Coupled with a Structural Mechanics Problem

W. Joppich1, N. Kopp2, and D. Samokhvalov1
1University of Applied Sciences Bonn-Rhein-Sieg, Sankt Augustin, Germany
2Technisch Mathematische Studiengesellschaft GmbH, Bonn, Germany

We consider an object re-entering the atmosphere at high velocity and a certain angle. As the density of the atmosphere increases, the temperature of the material is increased by friction. It is of interest to know whether the body is only deformed, or if it is destroyed.To answer this question of how the object behaves, we have coupled two heat transfer problems to a structural mechanics ...

Computation of Airfoils at Very Low Reynolds Numbers

D. Bichsel1, and P. Wittwer2
1HESSO, Ecole d'Ingénieurs de Genève, Geneva, Switzerland
2DPT, Université de Genève, Geneva, Switzerland

We discuss a new numerical scheme involving adaptive boundary conditions which allows to compute, at very low Reynolds numbers, drag and lift of airfoils with rough surfaces; efficiently and with great precision.As an example, we present the numerical implementation for an airfoil consisting of a line segment. The solution of the Navier-Stokes equations is singular at the leading and trailing ...

Design of an Anti-Magnetic Screen for the Neutron Decay Spectrometer aSPECT

G. Konrad1, F. A. Guardia1, S. Baesler1,2, M. Borg1, K. Eberhardt3, F. Gluck4,5, W. Heil1, S. Hiebel1,6, R. M. Horta1, and Y. Sobolev1
1Universität Mainz, Institut fur Physik, Mainz, Germany
2University of Virginia, Department of Physics, Charlottesville, VA, USA
3Universität Mainz, Institut for Kernchemie, Mainz, Germany
4Universität Karlsruhe, Experimentelle Kernphysik, Karlsruhe, Germany
5Research Institute for Nuclear and Particle Physics, Theory Department, Budapest, Hungary
6Sekels GmbH, Ober-Mörlen, Germany

This paper deals with the design of an anti-magnetic screen for a superconducting retardation spectrometer using COMSOL Multiphysics.COMSOL was used to model and optimize the anti-magnetic screen to obtain a design that reduces the exterior magnetic field by a factor of about 10, yet does not affect the internal magnetic field and its homogeneity, and that makes sure that the additional forces ...

Quick Search