Technical Papers and Presentations

Ici vous trouverez les présentations issues des Conférences COMSOL à travers le monde. Réalisées par des utilisateurs de COMSOL Multiphysics, ces présentations explorent tous les domaines actuels d'innovation. Les applications couvrent pratiquement tous les secteurs industriels et impliquent des phénomènes électriques, mécaniques, fluidiques et chimiques. Utilisez la recherche rapide pour trouver les présentations les plus intéressantes dans votre domaine d'intérêt.

Optical Manipulation of Microscopic Objects

R. Ozawa
Yokohama University

In recent years, optical manipulation using optical radiation pressure has been widely studied. In this study, the radiation pressure exerted on various kinds of microscopic objects with different laser beams was evaluated by COMSOL Multiphysics software. By changing beam shapes, microscopic objects can be trapped and rotated. This paper is in Japanese.

Optimized Cantilever-to-Anchor Configurations of Buckled Cantilever Plate Structures for Transducer Applications

A. Arpys Arevalo Carreno[1], D. Conchouso Gonzalez[1], I.G. Foulds[1]
[1]King Abdullah University of Science and Technology, Thuwal, Mecca, Kingdom of Saudi Arabia

The mechanical simulation and analysis of the cantilever-to-anchor configuration for an out-of-plane structure used in transducer applications is reported. The polymer-based Buckled Cantilever Plate “BCP” structure, gives the ability to orient an active device from a horizontal to a vertical position, once assembled. In this paper we compare four different cantilever-to-anchor ...

Droplet Generation by Means of a Two-Fluid Probe

B.P. Cahill[1], M. Quade[1], G. Gastrock[1], K. Lemke[1], J. Metze[1], and D. Beckmann[1]

[1]Institut für Bioprozess und Analysenmesstechnik e.V., Rosenhof, Heilbad Heiligenstadt, Germany

This paper presents a simulation of the operation of a new type of droplet generation probe. This probe, consisting of two concentrically-arranged tubings, is immersed in a beaker of cell medium so that oil is pumped through the outer tubing at a pumping speed less than fluid is drawn into the inner tubing. In this way, droplets of cell medium are entrained into the outlet tubing forming a ...

Deposition of Aerosol Particles in Electronic Devices

M. Olin [1], L. Laakso [1], J. Hannula [2], T. Galkin [2], and K. Väkeväinen [2]
[1] University of Helsinki, Finland
[2] Nokia Corporation, Finland

Small electronic devices are nowadays used in varying conditions, which expose them to stresses. One part of this stress is related to transport of potentially harmful chemical substances into small mechanical structures of devices, which happens by molecular diffusion and advection by air flow. We have applied a simplified contamination model, whose parameters, though, are estimated by ...

Wave Energy Converter through Piezoelectric Polymers

A. S. Zurkinden1, F. Campanile1, and L. Martinelli2
1Swiss Federal Institute of Technology (ETH), Zürich, Switzerland
2Università di Bologna, Bologna, Italy

This note addresses the concept of wave energy conversion by means of a piezoelectric material. The ocean surface waves represent an important source of energy. A multiphysics simulation is used to focus on different aspects, namely the free surface wave, the fluid-structure interaction, the mechanical energy input to the piezoelectric material and the electric power output, using an equivalent ...

Modeling and Characterization of Superconducting MEMS for Microwave Applications in Radioastronomy

N. Al Cheikh[1], P. Xavier[1], J. Duchamp[1], and K. Schuster[2]
[1]Institute of Microelectronics, Electromagnetism and Photonics (IMEP-LAHC), Grenoble, France
[2]Institute of Millimetrics Radio Astronomy (IRAM), Grenoble, France

Superconducting GHz electronics circuits are frequently used in Radio Astronomy instrumentation. The features of these instrumentations can be significantly improved by using tuneable capacitances, which can be realized by electrically actuated, micromechanical bridges (MEMS) made of superconducting Niobium (Nb). In order to analyze the electromechanical behavior of such devices and the intrinsic ...

Design of Traveling Wave Ultrasonic Vibration Disk for Nano-particles in Liquid Dispersion

J. Muraoka, and T. Suzuki
Yamagata Research Institute of Technology

The traveling wave ultrasonic vibration disks for dispersion of particles were designed by using of FEM analysis. The vibration disks are required specific vibration pattern, which contains three nodal lines. The vibration disk thickness was calculated to be matched the resonance frequency of bolted langevin type transducer and the specific vibration pattern. The alignment of the transducer was ...

Numerical Modeling of a MEMS Sensor with Planar Coil for Magnetic Flux Density Measurements

J. Golebiowski[1], S. Milcarz[1]
[1] Department of Semiconductor and Optoelectronics Devices, Technical University of Lodz, Lodz, Poland

The silicon cantilever with the planar coil was applied to the magnetic flux density measurements. The influence of shape and dimensions of planar coil on magnetic energy density was described. In cause of magnetic anisotropy of analyzed silicon structure FEM method and couple field method was applied in simulation. The Lorentz force based sensors owing to their potentially simpler fabrication ...

Oxidation of Metallic Nanoparticles

A. Auge[1], A. Weddemann[1], F. Wittbracht[1], B. Vogel[1], and A. Hütten[1]

[1]Department of Physics, Thin Films and Physics of Nanostructures, Bielefeld University, Bielefeld, Germany

The oxidation behavior of metallic nanoparticles is investigated in respect to material parameters like Mott potential, defects on the microstructure and oxide volume increase per ionic defect. An emphasis is laid on magnetic nanoparticles where the degree of oxidation can be measured via the reduction of the magnetic moment.

Water spreading anaysis on fabrics surfaces

Fichet, D.1, Lesage, F.1, Ventenat, V.2, Latifi, M.A.2
1 Laboratoire des Sciences du Génie Chimique, CNRS-ENSIC, Nancy Cedex, France
2 Centre de recherche Decathlon, Villeneuve d’Ascq, France

This paper deals with experimentation, modelling, simulation and optimisation of a Moisture Management Tester (MMT) which is used to determine the liquid spreading and transfer rates of a fabric. A 3D model was developed and implemented within FEMLAB. It consists of partial differential equations describing the mass balance of water adsorbed on the fibres and water moving in the free volume ...

Quick Search