Presentazioni e Articoli Tecnici

In questa sezione troverete i lavori presentati alle Conferenze mondiali COMSOL. Le presentazioni descrivono ricerche e prodotti innovativi progettati con COMSOL Multiphysics da colleghi di tutto il mondo. I temi delle ricerche presentate abbracciano un'ampia gamma di settori produttivi e aree applicative, in ambito elettrico, meccanico, fluidodinamico e chimico. Lo strumento di Ricerca Rapida vi permetterà di trovare le presentazioni che si riferiscono all'area di vostro interesse.

Coupled Electric-Thermal-Fluid Analysis of High Voltage Bushing

G. Eriksson[1]
[1]ABB, Corporate Research, Västerås, Sweden

Modern power transmission systems are in general designed to operate at high voltages in order to reduce resistive losses generated by high currents. This, however, tends to increase the risk for dielectric breakdown or flashovers if the equipment is not properly designed to withstand the stress. The present work illustrates how multiphysics simulations can be used to analyze and predict the ...

Contactless Power and Data Transfer for Multiple Nonlinear Loads

H.P. Schmidt [1], U. Vogl[1]
[1]UAS HAW Amberg-Weiden, Amberg, Germany

For the design of an inductive power and data transfer electromagnetic calculation are carried out. A transfer system is considered for loads that are distributed across some distances. For example, such loads are adjustable speed drives that are found in factory automation and intra-logistic. Physical properties of the inductive transfer are modeled via COMSOL. Lumped parameters are deduced from ...

Development of the Service Frame for SBS Tracker GEM and TENDIGEM Development

F. Noto[1], E. Cisbani[2], F. Librizzi[1], F. Mammoliti[3], C.M. Sutera[1]
[1]Istituto Nazionale Fisica Nucleare - Sezione di Catania, Catania, Italy; Dipartimento di Fisica ed Astronomia, Università di Catania, Catania, Italy
[2]Istituto Nazionale Fisica Nucleare - Sezione di Roma, Roma, Italy; Istituto Superiore di Sanità, Roma, Italy
[3]Istituto Nazionale Fisica Nucleare - Sezione di Catania, Catania, Italy; Dipartimento di Fisica ed Astronomia, Università di Catania, Catania, Italy

The Gas Electron Multiplier (GEM) technology has been proven to tolerate rate larger than 50 MHz/cm² without noticeable aging and to provide the sub-millimeter resolution on working chambers up to 45x45 cm² [1]. A new GEM tracker is under development for the upgrade of the SBS spectrometer in Hall A at Jefferson Lab. The chambers of the tracker have been designed in a modular way: each chamber ...

Development and Production of a Box for Storage and Shipping of HDIs in the Upgrade of the CMS Experiment

F. Noto[1], S. Costa[2], N. Giudice[2], F. Librizzi[3], A. Rapicavoli[2], M.A. Saizu[4], V. Sparti[3]
[1]Instituto Nazionale Fisica Nucleare, Sezione di Catania, Catania, Italy; Dipartimento di Fisica ed Astronomia, Università di Catania, Catania, Italy
[2] Dipartimento di Fisica ed Astronomia, Instituto Nazionale Fisica Nucleare, Sezione di Catania, Catania, Italy; Università di Catania, Catania, Italy
[3]Instituto Nazionale Fisica Nucleare - Sezione di Catania, Catania, Italy
[4]Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest-Magurele, Romania

The Large Hadron Collider at CERN has begun operations at 7 TeV center of mass energy. CERN plans to run at this energy until the end of 2012 with the goal of providing an integrated luminosity of a few fb?¹ to the CMS and ATLAS experiments. The LHC will then shut down for 1.5 to 2 years to make the revisions necessary to run at ~14 TeV. Operation resumes in 2014. In 2017/18, there will be ...

Parametric Study of Electrolyte-Supported Planar Button Solid Oxide Fuel Cell

A. Aman[1], R. Gentile[1], Y. Xu[1], N. Orlovskaya[1]
[1]Department of Mechanical, Materials and Aerospace Engineering, University of Central Florida, Orlando, FL, USA

Fuel cells are devices that convert chemical energy of a fuel into electrical energy through electrochemical processes. One of the types of fuel cell is the Solid Oxide Fuel Cell (SOFC) that uses solid ceramics for electrolytes. Numerical simulation involves constructing a mathematical model of the SOFC and use of specifically designed software programs that allows the user to manipulate the ...

Numerical Study and Simulation in COMSOL Multiphysics of the Dilution Process during Dust Sampling in Dry Machining

B. Wenga-Ntcheping[1], A. Djebara[1], R. Kamguem[1], J. Kouam[1], V. Songmene[1]
[1]University of Quebec-École de Technologie Supérieure, Montreal, Canada

Dilution’s issue during dry machining have raised the interest’s environmental researchers and engineers. In fact, the sampling of dust emitted during dry machining was a serious problem for air quality evaluation at the workplace. Furthermore, the best sampling of fine and ultrafine particles produced during material cutting, passed through the dilution of high particle concentration ...

Three Dimensional Modeling of PEM Fuel Cells with Current Collection from the Gas Diffusion Layer

R. Pushpangadan[1], A. Soman[2], Arundas R.[2], N. G. Thoppan[2], S. P. Duttagupta[1]
[1]Department of Electrical Engineering, Indian Institute of Technology Bombay, Mumbai, Maharashtra, India
[2]College of Engineering, Munnar, Kerala, India

PEM fuel cells are very promising for portable applications. A key component of fuel cell is the flow field plate through which hydrogen will reach the anode, oxygen will reach the cathode and electron collection. Flow field plate made of silicon is not a good electrical conductor , so electrical contacts has to be attached to the Gas Diffusion Layer (GDL) for taking the power to outside ...

Modélisation d'une décharge luminescente à la pression atmosphérique

Cormier, J.M., Semmar, N., Ouni, M.F.
GREMI, UMR 6606, Orléans

Les décharges luminescentes à pression atmosphérique sont étudiées expérimentalement en laboratoire pour la valorisation des alcanes et notamment la production d'hydrogène à partir du méthane. La modélisation des dispositifs usuels est complexe compte tenu de l'aspect non stationnaire des décharges. Afin d'évaluer le poids des paramètres de réglage d'un réacteur nous avons ...

Computations of the earth’s and other solar planets’ magnetic moments with the aid of a FEMLAB electromagnetic module

Wada, J.Y.
Retired, Hughes Space & Communications Co. (Now Boeing Co.)

Computations have been performed of Earth’s and other solar planets’ magnetic moments with the aid of a FEMLAB Electromagnetic Module. The FEMLAB library has a specific program that calculates magnetic field strength and distribution resulting from a circular current source. This program has been adapted with 38 concentric loops to simulate the conductive currents circulating within the ...

A Multi-Physics Framework for the Geometric Optimization of a Diaphragm Electrostatic Micropump

E. Bertarelli[1], R. Ardito[1], E. Bianchi[1], K. Laganà[1], A. Corigliano[1], G. Dubini[1], and R. Contro[1]

[1]Department of Structural Engineering, Politecnico di Milano, Milano, Italy

In this work, an electrostatic diaphragm micropump is investigated by means of COMSOL Multiphysics®. A fluid-dynamic model is adopted to evaluate the fluid flow characteristics inside the pumping chamber, in static conditions. In parallel, electromechanical quasi-static simulations are performed to evaluate the occurrence of membrane movement and pull-in phenomena. Finally, a simplified ...

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