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.

Parametric Model Of An Air-Core Measuring Transformer

D. Herceg
Faculty of Technical Science, Novi Sad, Serbia

Power grid voltages and currents may be distorted due to presence of harmonics. Measurements of such voltage with harmonics may be performed using newly developed instrument with a small air-core transformer based probe as the input unit. The probe must be shielded against unknown external electromagnetic fields. At the same time, the probe must remain linear throughout the range of frequencies. ...

Two-Dimensional FEM Analysis Of Brillouin Gain Spectra In Acoustic Guiding And Acoustic Antiguiding Single Mode Optical Fibers

Y.S. Mamdem[4], X. Pheron[2], F.Taillade[3], Y. Jaouën[4], R. Gabet[4], V. Lanticq[1,3], G. Moreau[1], A. Boukenter[5], Y. Ouerdane[5], S. Lesoille[3], and J. Bertrand[2]
[1]EDF R&D, Chatou, France
[2]ANDRA, Chatenay-Malabry, France
[3]LCPC, Paris, France
[4]Telecom ParisTech, Paris, France
[5]Laboratoire Hubert Curien, Saint-Etienne, France

We present a full modal -analysis of optical and acoustic properties based on two-dimensional finite-element method (2D-FEM) for Brillouin Gain spectrum (BGS) determination in optical fibers with COMSOL. This model enables us to predict precisely the BGS of any kind of silica fiber knowing well the geometry of doping composition. The results of numerical modeling have shown good agreement in ...

Material Flow around a Bobbin Tool for Friction Stir Welding

J. Hilgert, L. Hütsch, J. Dos Santos, and N. Huber
GKSS Forschungszentrum GmbH, Geesthacht, Schleswig-Holstein, Germany

This study presents an approach to model the material flow around a bobbin tool for Friction Stir Welding (FSW). In this CFD model the aluminum is treated as a highly viscous non Newtonian shear thinning liquid. The model is formulated in a 3D Eulerian frame. The temperature field and the desired torque acting on the tool are taken from a 3D thermal pseudo mechanical model implemented in ...

Application of Transfer Matrix Method in Acoustics

G. Campa, and S.M. Camporeale
Politecnico di Bari, Bari, Italy

The Transfer Matrix method in the Acoustics Module of COMSOL Multiphysics is used when the whole system can be represented into a sequence of subsystems that interact only with adjacent subsystems. This method is frequently used in mathematics and, particularly, in acoustics. The application of the present method is really useful, because it permits to break the total system into a network of ...

Pore-Scale Phase Field Model of Two-Phase Flow in Porous Medium

I. Bogdanov, S. Jardel, A. Turki, and A. Kamp
Open & Experimental Centre for Heavy Oil, University of Pau, Pau, France

Pore-scale modeling of multiphase flow through porous media is addressed most frequently to improve our understanding of flow and transport phenomena in such settings. It can be used to obtain macro-scale constitutive equations, to assign multiphase flow properties in large scale models, to predict how these properties may vary with rock type, wettability, etc. The description of a physical ...

Modeling Heat and Mass Transfer in Bread During Baking

V. Nicolas[1,2], J.P. Ploteau[1], P. Salagnac[2], P. Glouannec[1], V. Jury[3], and L. Boillereaux[3]
[1]Laboratoire d’Ingénierie des MATériaux de Bretagne – Equipe Thermique et Energétique, Université Européenne de Bretagne, Lorient Cedex, France
[2]Laboratoire d’Etudes des Phénomènes de Transfert et de l’Instantanéité : Agro-industrie et Bâtiment, Université de La Rochelle, La Rochelle Cedex, France
[3]Laboratoire de Génie des Procédés, Environnement, Agroalimentaire, ENITIAA, France

In this paper, we present a first model carried out with COMSOL Multiphysics to model bread baking, considering heat and mass transfer coupled with the phenomenon of swelling. This model predicts the pressures, temperatures and water contents evolutions in the dough for different energy requests. First results obtained are analyzed according to various physical parameters in order to better ...

A Model of Gas Bubble Growth by COMSOL Multiphysics

B. Chinè[1,2], and M. Monno[1,3]
[1]Laboratorio MUSP, Macchine Utensili e Sistemi di Produzione, Piacenza, Italy
[2]Instituto Tecnològico de Costa Rica, Escuela de Ciencia e Ingenierìa de Materiales, Cartago, Costa Rica
[3]Politecnico di Milano, Dipartimento di Meccanica, Milano, Italy

We use COMSOL Multiphysics to model a gas bubble expansion in a viscous liquid initially at rest, a very common system for lightweight foamed materials from metal production and polymer processing. Modelling and simulation of foam processing during the production step involves many complexities, mainly due to the coupled momentum, mass and energy transport mechanisms, presence of more phases in ...

Simulating A Fan For Industrial Ventilation

G. Argentini
Riello Burners, Italy

This work talks on simulation of a ventilating structure for an industrial burner. The mathematical model is based on the frozen-rotor technique, and the numerical simulation is used for resolution of fluid dynamics equations for the air flow into the rotating wheel and into the static volute of the fan. The numerical results obtained with COMSOL’s CFD module are compared with experimental data ...

Finite Element Modeling of Coupled Heat and Mass Transfer of a Single Maize Kernel Based on Water Potential Using COMSOL Multiphysics Simulation

A.J. Kovács, E. Lakatos, G. Milics, and M. Neményi
University of West Hungary, Institute of Biosystems Engineering, Mosonmagyarovar, Hungary

Finite element modeling of agricultural materials is very often used for describing physical processes. However, exact physical measurements are needed as input parameters for the models. Knowing the driving forces (potentials) during heat and mass transfers is necessary for an accurate model. Water potential gradients as the driving force are used in contrast with the conventional practice ...

Finite Element Analysis of Cables Heating Due to PoE/PoE+

S. Francois[1], and P. Namy[2]
[1]Nexans Research Center, Lyon cedex, France
[2]SIMTEC, Grenoble, France

Power over Ethernet (PoE/PoE+) is a technology allowing to transmit data and power over the same data cable. The major concern for this technology is the degradation of data transmission performances due to the temperature increase in the cable. To have a better quantitative and qualitative knowledge of the temperature field in the cables, Nexans has developed a 2D finite element thermal model ...