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.

Modelling of solute concentration into crud deposits under subcooled boiling conditions

Blondel, P., Girardin, G.
AREVA, Centre Technique Framatome ANP, Dpt Corrosion-Chimie Porte Magenta, Le Creusot France

The modelling of the incorporation of non-volatile solutes from liquid coolant into porous crud deposited on a heating surface under subcooled boiling conditions has been investigated. A suitable model for the concentration of solutes in porous deposits with steam chimneys, proposed by Pan et al., has been studied and implemented with the FEMLAB® software. With this model, the porous ...

Elastoplastic Models of the Interaction between Active Fronts of the Southern Alps and Dinarides (NE Italy and NW Slovenia)

M. Coccia[1], E. Carminati[1], F. Rolandone[2], M. Battaglia[1], D. Zuliani[3], and P. Fabris[3]
[1]Università La Sapienza, Roma, Italy
[2]Université Pierre et Marie Curie, Paris, France
[3]Centro Ricerche Sismologiche, Udine, Italy

We use GPS measurements and Finite Element analysis to investigate strain accumulation in the interaction between active fronts of the Southern Alps and Dinarides at the northern edge of the Adriatic micro-plate. We develop a three dimensional model of the area taking into account the regional topography, approximating the crust as an elasto-plastic medium and reproducing as close as possible the ...

Boundary Conditions Identification for Thermostatic Cauchy Problem by Minimizing an Energy-like Function

T.N. Baranger
LDMS, UMR CNRS-INSA 5006, ISTIL - Université Claude Bernard, Lyon

An energy-like error function is introduced in the context of the ill-posed problem of boundary data recovering, which is commopnly known as a Cauchy problem. Here the problem is converted into an optimization problem. Numerical simulations highlight the efficiency and robustness of the proposed method.

Computer Modelling of Deformable non-Newtonian Flow using COMSOL Multiphysics

H.A. Lecuyer[1], F.H. Bertrand[1], P.A. Tanguy[1], J.P. Mmbaga[2], and R.E. Hayes[2]
[1] Ecole Polytechnique , Montreal
[2] University of Alberta, Edmonton

This presentation is concerned with the modelling of deformable non-Newtonian Flow using COMSOL Multiphysics. This general modelling approach has more concrete applications such as paper coating in a metering size press, meniscus location by PIDS to mention a few.

Numerical Validation of the Efficiency of Dual-Frequency Radiofrequency Ablation

A. Candeo[1] and F. Dughiero[1]
[1]Department Electrical Engineering, University of Padova, Padova, Italy

Radiofrequency Ablation (RFA) represents a valid alternative for treating liver metastases in medically complicated patients. Conventional devices currently operate at 500 kHz, due to good conducting properties of tissues. However, the use of lower frequencies (i.e. 20 kHz) has been recently reported to enhance the treatment effectiveness, due to a more pronounced difference in electrical ...

Experimental and Theoretical Studies on Air Exchange in Portable Devices

M. Olin [1], L. Laakso [1], J. Hannula [2], T. Galkin [2], K. Väkeväinen [2], and K. Hartikainen [3]
[1] University of Helsinki, Finland
[2] Nokia Corporation, Finland
[3] Ambertec Oy, Finland

In this paper, we perform a leakage analysis fitted to approximate analytical diffusion and air exchange models, by the helium injection method for one mobile phone type. In order to extend the applicability of our models, we developed a more complicated numerical model for diffusion, thermal conduction and free convection inside the phone.

Modeling Heat Barrier Efficiency of Flame Retarded Materials

S. Bourbigot, M. Jimenez, and S. Duquesne
Laboratoire Procédés d’Elaboration des Revêtements Fonctionnels, Ecole Nationale Supérieure de Chimie de Lille, Lille

In this paper, different approaches for modeling heat transfer in materials are examined: Heat anisotropy in styreneacrylonitrile copolymer provided by the nanodispersion and the orientation of single wall carbon nanotubes Heat protection of aluminum plate using nonwoven material made with high performance fibers Fire protection using intumescent paint on steel plate. It is shown that ...

A Non-isothermal Modeling of a Polymer Electrolyte Membrane Fuel Cell

H. Shin[1]

[1]Department of Mechanical Engineering, University of Michigan – Ann Arbor, Michigan, USA

Polymer electrolyte membrane (PEM) fuel cells have attracted attention as an alternative power source in various applications such as vehicles, portable supplies, and stationary power systems. A non-isothermal PEM fuel model is developed and simulated by using COMSOL Multiphysics. Although PEM fuel cells have been expected to be extensively used as an alternative power source, there have been ...

Modeling the Coupled Mass Transfer Phenomena During Osmotic Dehydration of Fresh and Frozen Mango Tissues

J. Floury[1], Q.T. Pham[2], and A. Le Bail[3]
[1] UMR STLO–INRA–Agrocampus
[2] School of Chemical Engineering and Industrial Chemistry, UNSW
Sydney, Australia.
[3] UMR CNRS GEPEA–ENITIAA, Nantes

In this paper, we present a mathematical model for simulating the mass transfer, during the osmotic dehydration of mango cubes. The mass balance equation for the transport of each constituent is established separately for intracellular and extracellular volumes but accounts for the mass exchange across the cell membrane and the shrinkage of whole tissue.

Analysis of Solar Hot Water Storage

K.O. Lund
Applied Chemical and Engineering Systems

In a Solar Hot Water System, the hot water from the solar collector enters at the top of the storage tank. A relevant question concerning the storage is what will the outlet temperature be. In the present work we present a way to model Solar Hot Water Systems.

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