Veröffentlichungen und Präsentationen

Hier finden Sie Veröffentlichungen und Präsentationen der weltweit stattfindenden COMSOL-Konferenzen. In diesen präsentieren Ihre Fachkollegen ihre neuesten mit COMSOL Multiphysics entwickelten Produkte und Ideen. Die Forschungsthemen umfassen ein weites Feld von Industrien und Anwendungsbereichen, die von Mechanik und Elektronik über Strömungen bis zur Chemie reichen. Nutzen Sie die Quick Search, um die zu Ihrem Forschungsbereich passenden Präsentationen zu finden.

Multiphysics Modeling of Electro-Optic Devices

J. Toney
Srico, Inc.
Columbus, OH

Designers of electro-optic modulators and related devices often use separate tools to study the optical and electrical portions of the device. The flexibility of COMSOL Multiphysics makes it possible to construct unified models of EO phenomena including realistic waveguide profiles and anisotropic material properties. We demonstrate the use of the RF Module to compute both RF and optical ...

A Flow Induced Vertical Thermoelectric Generator and its Simulation using COMSOL Multiphysics

E. Topal
Micro and Nanotechnology Program
Middle East Technical University
Ankara, Turkey

In this study, a new thermoelectric harvester with fluid flow for increased performance is introduced. The thermoelectric generator is 3D vertical configuration with p- and n-doped Silicon thermolegs. There is water flow between channels integrated through the thermoelectric columns, providing forced convection on the heat flow path. Our thermoelectric generator design can be used for energy ...

Conjugate Heat Transfer for Wireless Power Amplifier

M. Williamson, S. Khan, and J. Kuntz
Kansas State University
Salina, Kansas

Wireless power transfer is an emerging technology with many potential applications. This technology may be of particular value when remotely controlled in extreme physical conditions. This study explores the ability of the COMSOL software to predict the performance of thermal management systems coupled with a commercially available wireless power amplifier. This study has undertaken the task ...

Electro-Stimulating Implants for Bone Regeneration: Parameter Analysis on Design and Implant Position

Y. Su[1], R. Souffrant[1], D. Klüß[1], R. Bader[1], M. Ellenrieder[1], and H. Ewald[2]
[1]Department of Orthopaedics, University of Rostock, Rostock, Germany
[2]Department of General Electrical Engineering, University of Rostock, Rostock, Germany

A common clinical treatment is the application of alternating electromagnetic fields using a screw implant to the weak bone tissue within the femoral head, which speed up the bone regeneration in case of avascular necrosis of the femoral head . In our present work the bipolar induction screw system as the depicted ASNIS S-Series screw with integrated coil and electrodes were investigated. ...

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

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

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 ...

Simulation of a Magnetic Induction Method for Determining Passive Electrical Property Changes of Human Trunk Due to Vital Activities

H. Mahdavi[1], J. Rosell Ferrer[1]
[1]Universitat Politècnica de Catalunya, Barcelona, Spain

The human body consists of many different types of tissues each with specific passive electrical properties. Vital activities lead to a characteristic change of these properties and geometrical changes. Magnetic induction is a non-contact method which can be used to determine these changes. The method is based on the creation of a primary magnetic field that will produce eddy currents in the ...

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 ...

A Mathematical Tool for Studying Drug Delivery to the Eye in Case of Glaucoma

P. Silva[1], J.A. Ferreira[2], P. de Oliveira[2]
[1]Coimbra Institute of Engineering, CMUC, Coimbra, Portugal
[2]Department of Mathematics University of Coimbra, CMUC, Coimbra, Portugal

The aim of the poster is to present a coupled 2D mathematical model to predict the evolution of drug concentration - in the cornea and in the anterior chamber of the eye - when therapeutic lenses are used (Figure 1). The mathematical model takes into account (i) diffusion processes in several compartments of the eye (therapeutic lens, cornea and anterior chamber); (ii) metabolic consuming ...

Numerical Study of the Scattering of a Short-Pulse Plane Wave by a Buried Sphere in a Lossy Medium

F. Frezza[1], F. Mangini[1], M. Muzi[2], P. Nocito[3], E. Stoja[1], N. Tedeschi[1]
[1]Department of Information Engineering, Electronics and Telecommunications, "La Sapienza" University of Rome, Rome, Italy
[2]Institute of Advanced Biomedical Imaging, "G. d'Annuzio" University Fondation, University "G. d'Annuzio" Chieti-Pescara, Chieti, Italy
[3]Istituto Superiore C.T.I., Communications Department, Ministry of Economic Development, Rome, Italy

The scattering by a buried sphere in the frequency domain with the use of the Finite Element Method (FEM) implemented by COMSOL Multiphysics, is analyzed. A short-pulse is used as an excitation with the spectrum spanning from 50 MHz to 1 GHz. In order to validate our results, a comparison with data available in the literature is presented, in the simple case of a perfectly-conducting (PEC) ...

Optimal Placement of Piezoelectric Plates to Control Multimode Vibrations of Rotating Beam

F. Botta[1], D. Dini[2], S. Gentili[1], G. Cerri[1]
[1]Dipartimento di Ingegneria Meccanica e Industriale, Università degli Studi di Roma Tre, Roma, Italy
[2]Department of Mechanical Engineering, Imperial College London, London, United Kingdom

Turbomachines blades are forced by a load resulting from the interaction with the fluid. The consequent vibrations, and the associated fatigue phenomena, can give catastrophic failures and the reduction of the blades life. It could be increased if damping system are used. The piezoelectric materials has received considerable attention by many researcher for their potential application in the ...

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