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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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

Structural Analysis: Going Beyond Standard Load Cases

I. Kjelberg
CSEM sa, Switzerland

Dr. Ivar Kjelberg is Senior Project Manager for Mechatronics in the Systems Engineering Division of CSEM SA in Neuchâtel, Switzerland. He obtained the diploma as \"Ingénieur Physicien\" from the Ecole Polytechnique Fédéreale EPFL in Lausanne, Switzerland in 1979, and a PhD at the local Institute for Plasma Physics (CRPP-EPFL) in 1986. He started his career at CSEM in 1988 and has since occupied ...

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 ...

Deformation Behavior Of A Liquid Droplet Impacting A Solid Surface

S. Oukach[1], M. Elganaoui[1], B. Pateyron[1], and H. Hamdi[2]
[1]Laboratoire des Sciences des Procèdes Céramiques et de Traitements de Surface SPCTS, Limoges, France
[2]Laboratoire de Mécanique des Fluides et Energétique LMFE, Marrakech, Morocco

The quality of coatings obtained by means of thermal spraying depends strongly on the mechanism of the interaction between the molten droplets and the surface to be covered. The aim of the present study is to simulate the impact of a droplet onto a substrate, in order to have a good understanding of the dynamics of droplets impact. In this study, the process of droplet spreading is described; ...

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 ...