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.

Thermo-mechanical Behavior of Multilayers

Bilotsky, Y., Gasik, M.
Laboratory of Materials Processing and Powder Metallurgy, HUT, Finland

The model for study of thermal mechanical behavior of multilayer thin films was developed. The stress-strain analysis was carried out in combination with thermal effects. The 2D thinfilm model has been solved by FEMLAB 3.1i. The middle layer was thermally loaded with Ohmic heating and other layer’s thicknesses were varied in time. All material data like elastic coefficients, thermal ...

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.

Mould heating distribution control system simulation for polymerization of a composite spar for helicopter main rotor blade

Slusar, B.1, Flek, M.1, Rubtsov, Y.1, Shevtsov, S.2, Fomin, A.3
1 Rostov Helicopter Plant «Rostvertol», Rostov-on-Don, Russia
2 Southern Center of Russian Academy of Science, Rostov-on-Don, Russia
3 Don State Technical University, Rostov-on-Don, Russia

High cost and complexity of technological equipment for manufacturing in aeronautical engineering, necessity of fast reequipment for creation of new modifications of flight vehicles make the use of software for modeling prior to design activities very topical. Manufacturing of a polymeric composite spar of the helicopter main rotor blade is an example of technology, where it is necessary to ...

3D Modeling and Simulation of the Electromagnetic and Thermal Properties of Microwave and Millimeter Wave Electronics Packages

J. Ding, and D. Linton
Queen’s University, Belfast

The COMSOL Multiphysics package has been used in this work to model and simulate the electromagnetic and thermal properties of GaAs pHEMT based Monolithic Microwave Integrated Circuits (MMIC), and a multi-chip millimeter wave package including a Low Temperature Co-fired Ceramic (LTCC) antenna array. Embedded shielding ground planes inside the ceramic and silicon carriers have been studied. The ...

Model-Based Calibration System for Direct Thermal Printing

W. Vetterling[1], and Z. Peng[1]
[1]Zink Imaging, Inc., Bedford, Massachusetts, USA

This document describes a method for maintaining the long-term calibration of a full color direct thermal printer. An essential component of the system is a thermal model created using COMSOL Multiphysics that allows fitting of color data recorded at different temperatures and exposure times to model results for the same conditions. The fitted results reveal the depth and thickness of color dye ...

Equation Based Heat and Mass Transfer in Porous Media

S. Pemberton[1], K. Ekici[1], R. Arimilli[1]
[1]The University of Tennessee, Knoxville, TN, USA

Perspiration during intense physical activity is an essential part of human thermoregulation. Clothing affects the cooling rate of the body. Heat and water vapor are coupled through evaporation and transported through the fabric. A model of the above system was developed for fabrics of different properties to simulate human cooling using COMSOL Multiphysics®. Equation-based modeling allows the ...

Effects of the Film Thickness on the Transient Conjugate Opticalthermal Fields in Thin Films Irradiated by Moving Sources in Back and Front Treatments

N. Bianco[1], O. Manca[2], S.Nardini[2], and D. Ricci[2]

[1]DETEC, Università degli Studi di Napoli Federico II, Napoli, Italy
[2]DIAM, Seconda Università degli Studi di Napoli, Aversa, CE, Italy

A two dimensional transient analysis of the conjugate optical-thermal fields induced in a multilayer thin film structure by a moving Gaussian laser source is carried out numerically in order to compare back and front laser treatment processes. Thermal and optical nonlinearity is induced during transient heating, since the response of weakly absorbing thin films depends on temperature. The heat ...

Use of COMSOL to Estimate the Thermal Properties and Kinetic Parameters for the Degradation of Anthocyanins in Grape Pomace

D.K. Mishra[1], and K.D. Dolan[1,2]
[1] Department of Biosystems and Agricultural Engineering, Michigan State University
[2] Department of Food Science and Human Nutrition, Michigan State University

Degradation of components in low-moisture and high-temperature food is difficult to model because of the temperature gradient and long heating time. A method was developed to estimate the thermal properties of grape pomace and the rate constant and activation energy of anthocyanin degredation.

FE Model of Thermo-Mechanical Interaction in Rubber Blocks under Dynamic Cyclic Stress

L. Pešek
Petr Šulc Institute of Thermomechanics

In this paper, we investigate the feedback thermo-mechanical interaction in a pre-pressed rubber block used for resilient elements of composed tram wheels. The structural motion and heat conduction equations are solved interactively as a time-dependent problem. The equality of heat energy density and dissipation energy density realizes the coupling between the equations. The dissipation ...

A Numerical Investigation on Active Chilled Beams for Indoor Air Conditioning

G. Cammarata, and G. Petrone
Department of Industrial and Mechanical Engineering, University of Catania, Catania, Italy

In this study fluid-dynamical and thermal performance of active chilled beams is investigated by 2D and 3D modelling in COMSOL Multiphysics. Three different typologies of those air conditioning systems are considered. Results, obtained for typical range of variation of operational conditions, are principally produced as temperature and velocity distributions. Special attention is paid to the ...

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