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.

Effects of Nonlinear Magnetic Properties on Magnetic Bonding Forces for Magnet Array Self-Assembly

S.B. Shetye, J.S. Agashe, and D.P. Arnold
University of Florida

The objective of this researh is to develop new, magnetically-directed, self-assembly approaches to enable three-dimensional structures to be formed in parallel from a heterogeneous mixture of parts of arbitrary size and shape.

Determination of Electric Potential Distribution and Cell Resistance of a Uranium Electrorefining Cell

S.P. Ruhela, S. Agarwal, B. Muralidharan, B.K. Sharma, B.P. Reddy, G. Ravisankar, K. Nagarajan, C.A. Babu, and P. Kalyanasundaram
Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, Tamil Nadu, India

Electrorefining is an electrolytic process for obtaining high purity metal. In this process the impure metal is made anode and the high purity metal is deposited on cathode. Electrorefining is a key step in pyrochemical reprocessing of spent fuel from metal fuel fast reactors. Development of an electrorefining cell, in which processing of 10 kg of simulated spent fuel will be demonstrated, is ...

Störwirkungsanalyse transienter elektromagnetischer Feldimpulse auf integrierte Schaltungen

S. Korte, and H. Garbe
Universität Hannover, Institut für Grundlagen der Elektrotechnik und Messtechnik, Hannover

Dieses Paper zeigt Untersuchungen zum Zerstörverhalten elektronischer Logikbauelemente bei Beaufschlagung mit elektromagnetischen Feldimpulsen (EMP). Es wird zunächst generell auf den Prozess der Einkopplung transienter Feldverläufe in elektronische Systeme eingegangen. Daraus werden die für eine spätere Simulation benötigten Störsignale innerhalb der Systeme abgeleitet und analytisch ...

Modelling of Selected Electromechanical Phenomena in the DC Machine

M. Antczak, P. Idziak, and W. Lyskawiski
Poznań University of Technology, Poland

The paper presents the results of the experiment consisting in determination of the influence of the magnetic field on deformations of the stator and the rotor of the DC motor. The numerical model of the motor for the frameless DC machine of the G series has been elaborated. Real material properties and the phenomenon of the magnetic circuit saturation have been taken into consideration. The ...

Calibrating electric instruments of the Huygens probe and modelling the dielectric properties of the atmosphere and of the surface of titan

Simões, F.
Centre d'Etude des Environnements Terrestre et Planétaires (CETP), Saint Maur des Fossès, France

In 14 January, 2005, the Huygens Probe has descent through the atmosphere of Titan and has survived to touchdown, collecting data in the atmosphere and on the surface of the largest moon of Saturn. One of the instruments, the Huygens Atmospheric Structure Instrument (HASI), includes the Permittivity, Waves, and Altimetry (PWA) analyser, which is a subsystem for studying the electric activity of ...

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 ...

Grading of Electric Field in Medium Voltage Motors using Embedded Metallic Foils in Stator Ground-Wall Insulation

E. Sharifi, E. A. Cherney, and S. Jayaram
University of Waterloo, Waterloo, ON, Canada

A conventional stress grading system in medium voltage motors, based on field dependent nonlinear material, used at the end of the conductive slot coating in form-wound coils, is not effective when the motor is fed from pulse width modulated (PWM) voltage source converters (VSCs). Very fast rise-time with high repetitive pulses of these converters impose high electric and thermal stresses on the ...

Three Dimensional Electrosensory Model of a Weakly Electric Fish, Gnathonemus Petersii

K. Mayekar[1], H. Bousack[2], and G. von der Emde[1]
[1]Rheinischen Friedrich-Wilhelms-Universität, Bonn, Germany
[2]Forschungszentrum Jülich, Jülich, Germany

Weakly electric fishes provide ideal paradigms for studying the interactions between morphology, perception, and locomotion. Electrically active body surface acts as an \"electric retina\" through which they can explore the surroundings. The computational investigations of this phenomenon is helpful to obtain a deeper understanding of the electric field sensing modalities of the fish which can ...

Dielectric Stress and Coordination Study in the PAB72 High Voltage Circuit Breaker Interrupter

D. Andrade, and D. Schiffabuer
Pennsylvania Breaker LLC, Canonsburg, PA, USA

Pennsylvania Breaker presents a dielectric stress study for its 72kV class breaker. This study was instrumental in the design and testing procedures during the research and development phase. COMSOL was incorporated into the design pipeline as an important tool for rapid reference of complicated and costly steady state electric cases. The purpose of this study was to develop a robust geometric ...

The GEM Technology for the SBS at Jefferson Lab

F. Noto[1], V. Bellini[1], E. Cisbani[2], and C. Sutera[1]
[1]INFN Sez. di catania, Università di Catania, Italy
[2]INFN Sez. Roma, Italy

The Gas Electron Multiplier (GEM) technology has proven to tolerate rate up to 50 MHz/cm2 without noticeable aging and to provide the required resolution on working chambers up to 33x33 cm2. The SBS GEM chambers have been designed in a modular way: each chamber consists of 3 adjacent GEM modules. Each GEM module has an active area of 40x50 cm2, which 2 represent the current standard double mask ...

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