Artigos Técnicos e Apresentações

Aqui você encontrará apresentações realizadas nas Conferências de Usuários COMSOL de todo o mundo. As apresentações englobam pesquisas e produtos inovadores feitas por engenheiros e cientistas usando o COMSOL Multiphysics. Os tópicos abramgem uma grande gama de indústrias e aplicações, como elétrica, mecânica, escoamento e química. Use a função de busca "Quick Search" para encontrar apresentações na sua área de interesse.

Comparison of 2D Conduction Models for Vertical Ground Coupled Heat Exchangers

A. Priarone[1], and S. Lazzari[2]
[1]DIPTEM-TEC, Università di Genova, Genova, Italia; Corresponding Author: a.priarone@unige.it
[2]DIENCA, Università di Bologna, Bologna, Italia

The effect of the infinite length approximation on evaluating the temperature of the surface of Borehole Heat Exchangers is determined by means of COMSOL Multiphysics. In detail, two 2D models of a BHE are compared: in the first model, the domain is represented by a cross-section of the geometry, while in the second model, it is represented by an axial-section of the geometry and, thus, the BHE ...

Double Pipe Heat Exchanger Modelling - COMSOL Uses in Undergraduate Education

L. Desgrosseilliers, and D. Groulx
Mechanical Engineering
Dalhousie University
Halifax, NS
Canada

A cornerstone of Chemical and Mechanical Engineering undergraduate programs the world over is the experimental and theoretical study of heat exchange. Graduating engineering students gain some appreciation in their lab course by comparing empirical correlations combined with the thermodynamics of heat exchange with the real operation of a counter-current, double pipe, single-phase heat exchanger.

Application of COMSOL Multiphysics in the Study of Heat Transfer in Solids: Comparison with Measurements Obtained by Means of Infrared Photothermal Radiometry

V.M. Suárez Quezada[1], J.H. Wong[1], J.A. Calderón Arenas[1], E. Marín Moares[1], José Bruno Rojas Trigos[1], Antonio Gustavo Juarez Gracia[1], Jonathan F Guarachi solano[1]
[1]Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada Unidad Legaria del Instituto Politécnico Nacional, Mexico, Distrito Federal, Mexico

We report the use of Heat transfer Module of COMSOL Multiphysics and a technique based on Infrared Photothermal Radiometry to study the heat transfer of a homogeneous and isotropic solid material excited by a periodic laser beam on the front side of the sample, and one infrared detector on the rear side in order to obtain the evolution of difference of temperature with the time exposure. We use ...

Simulation of a Multilayer Thermal Regulator for an Optical Reference

J.A. Ospina[1] and E. Canuto[1]
[1]Politecnico di Torino, Torino, Italy

The research project under which the COMSOL simulations are performed deals with multilayer and fine thermal control of an optical reference cavity for space applications. The cavity, made of Ultra Low Expansion glass (Corning ULE), must be kept close to the zero expansion temperature of the glass (close to room temperature). The target can only be met by active control, while leaving the cavity ...

Heat and Mass Transfer in Multilayer Fabrics

S. Quiniou1, F. Lesage1, V. Ventenat2, and M. A. Latifi1
1Laboratoire des Sciences du Génie Chimique, Nancy, France
2Centre de Recherche Decathlon, Villeneuve d'Ascq, France

In this paper, an investigation of heat and mass transfer in two-layer fabrics, used in the manufacture of comfortable sportswear, is presented. It is based on a model described by partial differential equations representing the mass balance of water vapor, free and adsorbed water and the heat balance in the fabric. The model involves several unknown physical and transfer parameters. A specific ...

Thermal Analysis of Vacuum Distillation Chamber in Pyroprocessing Facility

D. Sujish, S. Agarwal, B. Muralidharan, B.K. Sharma, V. Suresh Kumar, B. Prabhakara Reddy, G. Ravisankar, K. Nagarajan, C.A. Babu, and P. Kalyanasundaram
Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamil Nadu, India

Non aqueous metal fuel reprocessing involves electrochemical deposition of spent metallic fuel on the cathode of an electrolytic cell. Apart from metal fuel, the cathode deposit would also contain occluded molten salts and liquid cathode. Subsequent purification and consolidation of these heavy metals is conducted in a vacuum retort. Here the cathode deposits are charged into graphite crucible ...

Homogeneous Heating of Milk

A. Stahel, and A. Reichmuth
Berner Fachhochschule
Biel, Switzerland

When milk is taken out of a refrigerator it has to be heated up to 37°C. The standard solution is to put the bottle in a bath of warm water and wait. The goal is quickly to achive a uniform temperature of 37°C, without ever exceeding 40°C. Using COMSOL Multiphysics and a measurement setup for calibration, we show that this can be improfed by using variable heating. By choosing heating ...

Thermal Modelling of a Solar Water Collector Highly Building Integrated

F. Motte, and C. Cristofari
University of Corsica
Laboratory of Vignola
Ajaccio
Corsica, France

A new concept of solar water collector, highly building integrated has been developed and patented. This collector is hidden into a drainpipe and is totally invisible from the ground level. The drainpipe keeps its water evacuation function. Each installation is composed of several modules serial connected. An experimental wall has been build to test the thermal performances of the instalation ...

Perforation Effect on a Rectangular Metal Hydride Tank for Hydriding and Dehydriding Process

E. Gkanas[1][2], S. Makridis[1][2], E. Kikkinides[1], A. Stubos[2]
[1]Department of Mechanical Engineering, University of Western Macedonia, Kozani, Greece
[2]Environmental Laboratory, Institute of Nuclear Technology and Radiation Protection, NCSR 'Demokritos', Agia Paraskevi, Athens, Greece

Hydrogen storage in a metal hydride bed, uses an intermetallic alloy that can absorb efficiently high amounts of hydrogen by chemical bonding resulting to metal hydrides. This alloy is capable of absorbing and desorbing hydrogen while maintaining its own structure. The heat, mass and momentum transfer in a metal-hydride reactor is mathematically described by energy, mass and momentum balance ...

Simulation of Heat Transfer on a Gas Sensor Component

Eldén, L., Domeij Bäckryd, R.
Department of Mathematics, Linköping University, Linköping

Heat transfer is simulated on a gas sensor component and its closest surroundings consisting of a carrier and bond wires mounted on a printed circuit board. The component is heated in order to improve the performance of the gas sensing element. Power dissipation occurs by all three modes of heat transfer; conduction from the component through bond wires and carrier to the printed circuit board as ...

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