Articles techniques et présentations

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.

Modeling the ELENA Electron Cooler with COMSOL Multiphysics® Software - new

G. Tranquille[1]
[1]CERN, Geneva, Switzerland

ELENA is a small cooler decelerator ring at CERN which will be built to increase substantially the number of usable antiprotons delivered to experiments for studies with antihydrogen and antiprotonic nuclei. COMSOL Multiphysics® software has been used to completely model the ELENA electron cooling device in 3D. We have taken advantage of the different physics-based modules of COMSOL ...

On the Influence of Cancellous Bone Structure upon the Electric Field Distribution of Electrostimulative Implants - new

U. Zimmermann[1], R.Bader[2], U. van Rienen[1]
[1]Institute of General Electrical Engineering, University of Rostock, Rostock, Germany
[2]Department of Orthopaedics, University Medicine Rostock, Rostock, Germany

Since the 1980s, the accelerating effect of electromagnetic fields on bone regeneration is used to treat complicated fractures and bone diseases. At the University of Rostock, an electrostimulative hip revision system is developed, basing on the method of Kraus-Lechner. This method requires an electric fields between 5 and 70 V/m. The bone used for the simulations consisted of two homogenous ...

Integrated Ion Optics Design - new

T. Majoros[1], B. Sebök[1]
[1]Department of Atomic Physics, Budapest University of Technology and Economics, Budapest, Hungary

Introduction: This study aims the optimization and sensitivity analysis of an existing device. A Secondary Ion Mass Spectrometer (SIMS) device is to be equipped with a high power laser in order to increase sputtering speed. The modified device must be capable of handling the increased level of contamination and energy spread of sample ions. Use of COMSOL Multiphysics® software: Transmission ...

Smart Chest Belt for Cardiac Health Monitoring - new

M. Vijayalakshmi[1], R. C. Thiagarajan[1]
[1]ATOA Scientific Technologies Pvt. Ltd., Bengaluru, Karnataka, India

Conventional cardiac electrical signal monitoring and measurement techniques such as Electrocardiograph (ECG) are prone to operator error due to multiple lead attachment requirements. These multiple electrode based systems are also not convenient for continuous cardiac health monitoring, though ECG is the best way to measure and diagnose abnormal rhythms of the heart. In this paper, a smart chest ...

Modeling of Complex Structures in Electrotechnology

Göran Eriksson
Dr., ABB Corporate Research, Sweden

Outline of presentation: In electromagnetic technology applications the finite element method is very well suited for a wide range of problem types For many cases, in particular when inhomogeneous materials having complex properties are involved as well as when multiphysics couplings are essential, it is the only option available The somewhat unfavourable performance scaling with problem ...

Modeling Ion Motion in a Miniaturized Ion Mobility Spectrometer

S. Barth, and S. Zimmermann
Drägerwerk AG & Co. KGaA, Lübeck, Germany

Ion mobility spectrometry provides fast detection of very low concentrations of chemical substances. Simple instrumentation combined with high sensitivity and high selectivity are the advantages of this technique. One well established field of application is the detection of hazardous compounds in air, such as chemical warfare agents, explosives and pollutants. A numerical model based on finite ...

Development of an On-Line Wall-Fouling Sensor for Pipeline Transportation of Heavy Oil-Water Mixtures

S. Rushd[1], and R.S. Sanders[1]
[1]Chemical & Materials Engineering Department, University of Alberta, Edmonton, AB, Canada

A beneficial method for transporting highly viscous hydrocarbons (e.g. heavy oil and bitumen) through a pipeline is known as Lubricated Pipe Flow (LPF). A major challenge for this technology is flow instability caused by the formation of a wall-coating of oil or the thinning and/or loss of the lubricating water layer in the pipe. This issue can be addressed by using capacitance sensors to measure ...

Using the Superposition Principle and Edge Current Model to Compute Impedance of the Coil in a Logging Tool

T. Zhao, G. Minerbo, J. Hunka, and G. Hazen
Schlumberger
Sugar Land, TX

Coil antenna is the simplest form in well-logging tools for resistivity measurement of the formation. This paper introduces how to accurately compute the impedance of the coil with very thin wires at high frequency, and with the complex borehole structure, e.g., metal housing and collar. A 3D RF electromagnetic wave in frequency domain is used. An alternate array of transmitters and receivers ...

Operation of an Electromagnetic Trigger with a Short-Circuit Ring

D. Križaj[1], Z. Top?agi?[1], B. Drnovšek[1]
[1]Faculty of Electrical Engineering, University of Ljubljana, Ljubljana, Slovenia

Numerical simulation of an electromagnetic trigger with a short-circuit ring is presented. The main goal of inclusion of a short-circuit ring in an electromagnetic trigger is to develop an element suitable for use in a circuit breaker with capabilities of selective switching. The main problem to be solved is vibration of a moving contact due to zero electromagnetic force between the anchor and ...

Designing of End-winding Corona Protection of Generators by Help of Simulation

M. Wei[1], S. Grossman[1], J. Speck[1]
[1]Institute of Electrical Power Systems and High Voltage Engineering, Technische Universität Dresden, Dresden, Germany

The job of designing end-winding corona protection (ECP) system is one of the very important and complex phases for insulation configuration of high voltage rotating machines. This complexity stems on one hand from the highly nonlinear characteristics of the ECP material and on the other hand from the coupled multiphysics phenomena of the involved performance evaluation. Simulation based ECP ...

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