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.

Crystallization Kinetics of Semi-Crystalline Polymers During Cooling

N. Brahmia[1], P. Bourgin[1], M. Boutaous[1], and D. Garcia[2]
[1] Laboratoire de Recherche Pluridisciplinaire en Plasturgie
[2] Pôle Européen de Plasturgie Belignat

Thermoplastic polymers are frequently used in several industries, and represent the most important group of polymeric materials. During the injection moulding process, the cooling phase including solidification is often the most significant part of the manufacturing cycle. In this paper we study the coupling phenomena between the crystallization and the thermal kinetics in the polymer ...

From Numerical to Experimental Study of Microsystems for Dielectrophoresis on Bioparticles

P. Pham, I. Texier, and F. Perraut
CEA-LETI, Direction de la Recherche Technologique, Grenoble

This paper summarizes the numerical contribution to a project for the detection of bioparticles present in a small volume of a liquid sample. Dielectrophoresis (DEP) is used to enhance their transport toward the surface of a detector. The mathematical model is composed of the electrokinetics equation for the DEP force-field calculation, and the advection-diffusion equation for the particle ...

Catalytic Reactions under Non-steadystate Conditions

S. Pietrzyk, F. Dhainaut, A. Khodakov, and P. Granger
Université de Lille

In this paper, we present the modeling of catalytic reactions under non-steadystate conditions. Particularly, we study the Fisher-Tropsch reaction in a pulse reactor.

Finite Element Approach for Micromagnetic Systems

H. Szambolics[1], L. Buda-Prejbeanu[2], J.C. Toussaint[1,2], and O. Fruchart[1]
[1] Laboratoire Louis Néel, Grenoble
[2] Laboratoire SPINTEC, Grenoble

In this paper we propose a finite element model (FEM), to solve the micro-magnetic equations. Two bi-dimensional test problems are treated to estimate the validity and the accuracy of this approach.

Prediction of the Transmitted Light Through a Nano-Aperture of SNOM Probes

G. Louarn, S. Taleb, and S. Cuenot
Institut des Matériaux Jean Rouxel, Nantes

The knowledge of the light propagation through a nanometer-size aperture is crucial for Scanning Optical Near Field Microscopy (SNOM). In this work, we address a numerical study of the transmitted electric field through a SNOM probe. The influence of the wavelength is also studied. Our results show that the logarithmic power decreases linearly as a function of the aperture size, and the ...

Using COMSOL for Studying the Occurrence of a Constant-shaped Concentration Front in the Retention of Gaseous Pollutants by Adsorption Columns

A. Joly[1], V. Volpert[1], and A. Perrard[2]
[1] Université de Lyon
[2] Institut de Recherches sur la Catalyse, Lyon

Various models, based on mass transfer and different isothermal adsorption equilibrium laws, are developed using COMSOL Multiphysics. These isotherms are representative of the adsorption of various pollutant-adsorbent systems frequently found in decontamination processes. Consequences on breakthrough curves are examined and possible applications to decontamination processes are discussed.

Compressional Waves Generation in Droplets of Water Deposited on a Quartz Crystal

G. Couturier, R. Boisgard, C. Jai, and J.P. Aimé
Université Bordeaux

In this paper, we investigate the compressional wave generation in droplets and use different techniques to correlate the compressional wave generation to the shape of the droplets. Results show a good correlation between eigenmodes predicted by the theory and those experimentally observed.

MOCVD Research Reactor Simulation

H. Rouch
INOPRO, Villard de Lans

In this paper, we describe the methodology of modeling Metal Organic Chemical Vapor Deposition. As a special case study we investigate the Ag deposit.

Elastic and Poro-Elastic Models of Ventricular Dilatation in Hydrocephalus

S. Momjian[1], and D. Bichsel[2]
[1] Hôpitaux Universitaires de Genève, Switzerland
[2] HESSO Ecole d’Ingénieurs de Genève, Switzerland

Elastic and poro-elastic models of ventricular dilatation in hydrocephalus are presented in this paper. An important result was the accumulation of fluid capping the horns of the ventricles. This indicates the importance of interstitial fluid in calculating of the deformation of the brain.

Modeling of Different Shaped Micro-Cantilevers Used as Chemical Sensors

G. Louarn, M. Collet, and S. Cuenot
Institut des Matériaux Jean Rouxel, Nantes

In this work, we present the modeling of V-shaped silicon micro-cantilevers. The sensitivity of different V-shaped silicon cantilevers is estimated, as a function of the geometrical dimensions of the cantilever.

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