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.

3D Simulation of Air-Glass Heat Exchange in a Set of Vials

G. Mongatti[1], A. Borelli[1]
[1]Marchesini Group, Pianoro, Italy

In this model a three-dimensional heat transfer analysis was performed by using COMSOL Multiphysics\' Heat Transfer Module. The model is about the heating of a set of vials (Figure 1) in a current of hot air in the laminar regime. We used time dependent studies to predict the thermal behavior of the glass and to estimate the temperatures in the various points of the bottles at various times. ...

Inductive Heating Modelling with a Temperature-controlled Material

Hemous, R.
RocTool, France

Roctool is a company which develops and sells some process to heat and transform composite materials very quickly. One of these, the Cage System®, uses an inductive heating process which heats instantaneously the tooling surface of the mold, where the composite we want to transform is put. The thermal diffusion in the mass mold is reduced relative to other means of heating.

Simulation of Heat-induced Fusing of Polymer Toner

Hoffmann, R.
Océ Printing Systems GmbH, Poing

The electrophotographic print process uses polymer toner particles to create the desired print image on the paper. After depositing the particles on the paper, the particle layer has to be heated beyond the glass point of the polymer to create a homogeneous layer. This fusing process is one of the most energy-consuming parts of the whole print process. It is therefore imperative to limit the ...

Negative Thermal Expansion Materials: Thermal Stress and Implications for Composite Materials

M.J. Jakubinek[1,2], C.A. Whitman[2,3], and M.A. White[1,2,3]
[1]Department of Physics and Atmospheric Science, Dalhousie University, Halifax, Nova Scotia, Canada
[2]Institute for Research in Materials, Dalhousie University, Halifax, Nova Scotia, Canada
[3]Department of Chemistry, Dalhousie University, Halifax, Nova Scotia, Canada

There is considerable interest in the possibility of combining NTE materials with normal (positive) thermal expansion materials, to reduce the potential of failure of a material or component due to thermal stress fracture. Finite element analysis (FEM) is used to explore the overall expansion and thermal stress in composites.

Transient Conjugate Optical-thermal Fields in Thin Films Irradiated by Moving Sources: A Comparison between Back and Front Treatment

N. Bianco[1], O. Manca[2], and D. Ricci[2]
[1]Dipartimento di Energetica, Termofluidodinamica applicata e Condizionamenti ambientali, Università degli Studi di Napoli Federico II, Napoli, Italy
[2]Dipartimento di Ingegneria Aerospaziale e Meccanica, Seconda Università degli Studi di Napoli, Aversa (CE), Italy

A two dimensional instationary analysis of the conjugate optical-thermal fields induced in a multilayer thin film structure on a glass substrate by a moving Gaussian laser source is carried out numerically in order to compare back and front laser treatment processes. COMSOL Multiphysics 3.4 code has been adopted to solve the combined thermal and electromagnetic problem in order to compare the two ...

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 ...

Analysis of Infrared Signature of a Ship Operating in MIR and FIR Bands

A. Pellegrini[1], A. Beucci[1], and F. Costa[1]

[1]ALTRAN Italia, Pisa, Italy

In this paper a methodology for calculating the infrared signature of complex objects is presented. The transient thermal analysis allows us to evaluate the temperature distribution on the investigated object, pointing out which parts tend to be warmer. These temperature values are handled in the post processing phase in order to evaluate the zero range radiance distribution and the radiance of ...

Stirling Engine Simulation: Non-isothermal Flow / Structure Interaction

N. Martaj1, P. Rochelle1, L. Grosu1, R. Bennacer2, and S. Savarese3
1LEEE, Université Paris X, Ville d'Avray, France
2Laboratoire Environnement, Energétique, Valorisation, Matériaux (LEEVAM), Université de Cergy-Pontoise, Neuville-Sur-Oise, France
3COMSOL France, Paris, France

The reciprocating thermal engine of Stirling type, with its varied external heat sources and efficiency improving regenerator, is an alternate solution to be taken into account for efficient power applications of renewable energies. Work and efficiency of this machine is strongly dependent on geometrical and physical parameters such as dimensions, heat transfer coefficients, heat source ...

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 ...

Modeling Heat and Oxygen Atom Diffusion in Nuclear Fuel Rods with FEMLAB

Ramirez, J.C., Cristea, P., Stan, M.
Materials Science & Technology Division, Los Alamos National Laboratory

The nuclear reaction is modeled as a uniformly distributed volumetric heat source. All heat is conducted from the fuel towards the outer surface of the cladding. A number of results are presented.

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