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.

Simulation of Electromagnetic Stirrers and Brakes Applied in the Metallurgical Field

C. Mapelli
Politecnico di Milano

The control of the flux within continuous casting systems used in the metallurgical field can be obtained through the application of electromagnetic. The model here has been solved through a linear time-harmonic solver. The results of the electromagnetic model have then been applied to the fluid-mechanics model through volume Lorentz forces.

Designing an Array of Nanocalorimeters for Screening Biochemical Interactions

F. Torres
Palo Alto Research Center

In this presentation we present our analysis of the PARC Nanocalorimeter. Calorimetry is basically the measuring of heat of chemical reactions or physical changes. Nanocalorimetry is Calorimetry at the Nanometer scale. The PARC Nanocalorimeter is a special type of Calorimeter, it consists of arrays of Nanocalorimeters. The PARC Nanocalorimeter is intended to be used for screening biochemical ...

Thermo-fluid-dynamic evaluation of a microsystem to analyse radioactive solutions

G. Janssens-Maenhout
Joint Research Centre Ispra
Ispra, Italy

It has become common place to use micro-electromechanical systems (MEMS) to evaluate the chemical properties of solutions. However, such microchips have not yet been applied to the analysis of radioactive solutions, for the purpose of nuclear safeguards, in the nuclear reprocessing industry. Implementing MEMS in this area results in a reduced volume of the sample to be analysed. This has many ...

The pianistic touch: FEMLAB modeling of a grand piano action

Riccardo Ferrari
University of Trieste
Trieste, Italy

In this presentation we will show how to partially model a grand piano action. Then we will apply different touches to this virtual action and try to hear any difference. --------------------------------- Riccardo Ferrari was one of the keynote speakers at the COMSOL User's Conference, fall 2005 in Milano

Numerical Optimisation of Design Parameters in a Silicon-Based Microchannel Heat Sink

Shahrir b. Abdullah
Associate Professor
Faculty of Engineering
National University of Malaysia

In this presentation, a silicon-based microchannel heat sink with single and counter flows is modeled. The fluid flow and heat transfer inside the microchannels are simulated and analyzed, and optimisation of the design parameters is performed. Keynote speaker's biography:Shahrir Abdullah is a technical expert on COMSOL Multiphysics. He has conducted seminars, workshops & lecturers on ...

The Unroutinary Loads on the LBT Adaptive Secondary Mirror

C. Del Vecchio
INAF-OAA, Firenze, Italy

The thin shell of the LBT Adaptive Secondary Mirror has been manufactured, optically polished, and delivered. The operations and tests required before finally mounting it on the telescope have to be run very carefully, as they imply loads completely different from the ones of the adaptive operational modes - studied in the past with very encouraging results. Deformations and stresses that occur ...

Temperature Distribution Study of Composite Germanium Detector

M. Wolf1, J. Kojouharova2, I. Kojouharov2, T. Engert2, J. Gerl2, J. Groß1, and H.-J. Wollersheim2
1Hochschule Darmstadt, University of Applied Sciences, Darmstadt, Germany
2Gesellschaft für Schwerionenforschung GmbH, Darmstadt, Germany

Temperature distributions of cooled Germanium (Ge) detectors are calculated by the COMSOL Multiphysics software in order to determine the necessary cooling power of an electromechanical cooling engine. For a single Ge-crystal, heat losses of 2.5 W are determined, which increase to 5.7 W for a composite detector with three Ge-crystals.The energy transfer may be reduced substantially by a heat ...

Convective Movements in an Electrolyser

B. Morel1, P. Namy2, C. Belhomme1, and I. Crassous3
1Comurhex, Pierrelatte, France
2SIMTEC, Grenoble, France
3LI2C, Paris, France

Modeling electrolysers is a challenge because of the strong coupling between electrical, thermal and CFD equations. Indeed the electrical conductivity of the electrolyte varies with the temperature, which in turn depends on the heat dissipated by the Joule effect and anode over-voltage.In the present study, the fluid velocity values are computed near the electrodes using a diphasic level set ...

A non-Conventional use of COMSOL to Solve a Complex 3D Geometrical Problem

J. P. Caire, and F. Jomard
LEPMI, ENSEEG, Saint Martin d'Hères, France

The purpose of this study was the optimization of an industrial furnace from a thermal point of view. Such a cylindrical furnace contains an Al-Mg molten alloy covered by a KCl-NaCl molten salt layer floating on it to prevent alloy evaporation. When tilting the cylindrical furnace, it was necessary to compute the relation between the salt and alloy volumes and the area of the liquid alloy/salt ...

Pre-design of a Molten Salt Thorium Reactor Loop

J. P. Caire, and A. Roure
LEPMI-ENSEE, Saint Martin d'Hères, France

The generation 4 of molten salt reactors using the thorium cycle are characterized by a temperature close to 1000 oC. The very large heat transfers involved between the reactor core and the external parts with minimal thermal losses are a major issue. This study investigated a possible inner loop made of a series of conventional graphite filter plate exchangers, pipes and pumps, using the COMSOL ...

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