Technical Papers and Presentations

Here you will find presentations given at COMSOL Conferences around the globe. The presentations explore the innovative research and products designed by your peers using COMSOL Multiphysics. Research topics span a wide array of industries and application areas, including the electrical, mechanical, fluid, and chemical disciplines. Use the Quick Search to find presentations pertaining to your application area.

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.

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.

Modeling of Drops Spreading on Patterned Surfaces

J. Frassy[1], C. Lécot[2], C. Delattre[3], and A. Soucemarianadin[1]
[1] LEGI UMR 5519, Grenoble
[2] LAMA UMR 5127, Le Bourget-du-Lac
[3] LETI, CEA Grenoble

We present simulations of drops spreading on heterogeneous surfaces. The droplet height is the solution of a time-dependent non-linear fourth order partial differential equation, which is solved using COMSOL Multiphysics. In the fully wetting case, we compare our results with experimental data and with previous results reported in the literature. The simulation results reveal how ...

Heat and Mass Transfer Investigation in Fabrics

S. Quiniou[1], F. Lesage [1], V. Ventenat[2], and M.A. Latifi[1]
[1] Laboratoire des Sciences du Génie Chimique, Nancy
[2] Centre de recherche Décathlon, Villeneuve d’Ascq

In this paper, an investigation of heat and mass transfer in fabrics used in the manufacture of comfortable sportswear is presented. It is based on a model which is described by partial differential equations representing the mass balance of free and adsorbed water and vapour and the heat balance in the fabric. The model involves several unknown physical and transfer parameters. Two ...

Modelling of High Pressure Discharge Lamps

J-B. Rouffet, S. Bhosle, G. Zissis, and R. Ruscassié
Université Paul Sabatie, Toulouse

This paper presents the modeling of high pressure discharge lamps, which are complex molecular systems, using COMSOL Multiphysics. The model accounts for the momentum, mass and energy conservation equations.

Propagation of Crevice Corrosion by Numerical Modelling

A. Proust[1], G. Girardin[1], B. Vuillemin[2], P. Combrade[1], and R. Oltra[2]
[1] AREVA NP - Centre Technique - Département Corrosion-Chimie, Le Creusot
[2] Université de Bourgogne - Laboratoire de Recherche sur la Réactivité des Solides

The most common case of crevice corrosion occurs on passive materials such as stainless steels, in oxidizing-chloride environments. A flexible crevice propagation model has been developed to allow parametric studies of the solution. Our main results allow us to establish diagrams of stability of solid and gas phases within the crevice and to evaluate the influence of the external ...

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 ...

Analysis of the Electric Field and the Potential Distribution in Cavities Inside Solid Insulating Electrical Materials

T. Seghir[1], D. Mahi[1],T. Lebey[2], and D. Malec[2]
[1] Materials Laboratory, Electrical Engineering Institute, Amar Thelidji University of Laghouat, Algeria
[2] Electrical Engineering Laboratory, University of Paul Sabatier, Toulouse

Solid extruded polymeric materials such as crosslinked polyethylene are widely used in the electrical insulation of underground high voltage power transmission cables. This paper treats the combined effect of space charge and cavities, on the electric field, and potential and temperature distribution within the insulation. The model is a 3D stationary linear COMSOL Multiphysics model and the ...

Thermal Exchange Modelling on Hydrogen Plasma Reactor Walls

A. Michau, F. Silva, K. Hassouni, and A. Gicquel
Laboratoire d’Ingénierie des Matériaux et des Hautes Pressions, Villetaneuse

A reduced equivalent plasma model is proposed for thermal dissociation of molecular hydrogen, which allows a detailed description of atomic hydrogen recombination. This model, implemented with COMSOL Multiphysics, also accounts for surface temperature and thermal exchange on cavity walls. A self-consistent model previously developed in our laboratory has enabled us to determine that, at ...

Kinetics and Plasma Modeling of Plasma Steam Reforming at Atmospheric Pressure

J.M. Cormier, F. Ouni, and A. Khacef
GREMI, Polytech’Orléans

Gliding discharges at atmospheric pressure were investigated in the GREMI laboratory for different applications such as syngas production from methane steam reforming. In our case, the kinetics could be described by using a simplified second order model in which the rate reaction coefficient is obtained from a linearization of parameters. Calculated and experimental data are presented ...

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