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.

Convective Movements in an Electrolyser

B. Morel1, P. Namy2, C. Belhomme1, and I. Crassous3
1Comurhex, Pierrelatte, France
2SIMTEC, Grenoble, France
3LI2C, Paris, France

Modeling electrolysers is a challenge because of the strong coupling between electrical, thermal and CFD equations. Indeed the electrical conductivity of the electrolyte varies with the temperature, which in turn depends on the heat dissipated by the Joule effect and anode over-voltage.In the present study, the fluid velocity values are computed near the electrodes using a diphasic level set ...

Simplified 2D and 3D Models of Coating Formation: Application to Plasma Sprayed Zirconia

K. Fataoui1, B. Pateyron1, M. El Ganaoui1, M. Amara1, H. Rhanim2, and A. Belafhal2
1Université de Limoges, Limoges, France
2Faculté des Sciences, Université Chouaib Doukkali, El Jadida, Marocco

Since the nineties many works have been dedicated to splat formation modeling. The main part of these works takes into account the molten droplet impact onto a flat surface, its flattening and solidification.The aim of this work is to test if a simplified model in 2D allows to characterize the real contact between the splat and the substrate and to compare the results of the experiments and the ...

Modelling the Coupled Heat and Mass Transfer during Fires in Stored Biomass, Coal and Recycling Deposits

F. Ferrero
Federal Institute for Materials Research and Testing Division II.2, Berlin, Germany

It is known that in big storages of bulk materials the danger of the self-ignition is relevant (long time storages). The Consequences of uncontrolled fires include considerable CO2 emission and economical and human losses to mention a few. The understanding of this phenomena is therefore of great importance.A numerical model can be of great help in understanding such complex phenomena. In this ...

A non-Conventional use of COMSOL to Solve a Complex 3D Geometrical Problem

J. P. Caire, and F. Jomard
LEPMI, ENSEEG, Saint Martin d'Hères, France

The purpose of this study was the optimization of an industrial furnace from a thermal point of view. Such a cylindrical furnace contains an Al-Mg molten alloy covered by a KCl-NaCl molten salt layer floating on it to prevent alloy evaporation. When tilting the cylindrical furnace, it was necessary to compute the relation between the salt and alloy volumes and the area of the liquid alloy/salt ...

Modeling Flow Through Foam Channels

F. Rouyer, E. Lorenceau, and O. Pitois
Laboratoire de Physique des Matériaux Divisés et des Interfaces, Université Paris-est, Paris, France

We model the liquid transport in foam (i.e. drainage) by unidirectional flow transverse to a triangular planar area that represents channel (i.e. Plateau borders) cross-sections. Partial mobility of the interfaces is obtained balancing the bulk viscous stress with the surface viscous stress and a velocity equal to zero is imposed at the vertices. In liquid foams, the wedges of the channels are ...

Robust Design of an LEM by Means of Interval Taylor Extension

B. De Vivo, P. Lamberti, and V. Tucci
Dept. of Electrical and Electronic Engineering, University of Salerno, Salerno, Italy

In this paper, the Robust Design of a Linear Electric Motor (LEM) is performed. A Robust Design is a set of nominal parameters that satisfies the customer constraints with uncertain parameters. In particular, it is possible to obtain the Most Robust Stationary Design (MRSD) of a Performance Function (PF) by looking at the minimum range of the Interval Extension of its Taylor series. Furthermore, ...

Multiphysic Modeling of the Self-sustained Anisotropic Contraction of Cardiac Myocytes

P. Tracqui, and J. Ohayon
CNRS, Laboratoire TIMC-IMAG, Equipe DynaCell, La Tronche, France

In this work, we coupled intracellular calcium wave propagation to anisotropic active cellular contraction in order to investigate the self-oscillating contractions of isolated cardiac myocytes. The autocatalytic release of Ca2+ from intracellular stores is considered as the corner stone of a biochemical model exhibiting relaxation oscillations above critical thresholds of calcium fluxes. Using ...

Computation of Space-Time Patterns via ALE Methods

V. Thümmler1, and A. Weddemann2
1Department of Mathematics, Bielefeld University, Bielefeld, Germany
2Department of Physics, Bielefeld University, Bielefeld, Germany

Partial differential equations which exhibit solutions that are spatial temporal patterns are often found in biological and chemical systems, e.g. when describing pattern formation in reaction-diffusion systems.Special classes of such patterns are relative equilibria and relative periodic orbits, which are solutions that in an appropriately co-moving frame of reference are stationary and ...

3D Finite Element Models of Ground Deformation and Stress Field in a Viscoelastic Medium

D. Scandura1,2, G. Currenti1, and C. Del Negro1
1Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Catania, Catania, Italy
2Dipartimento di Matematica e Informatica, Università di Catania, Catania, Italy

A 3D finite element model was used to evaluate the time dependent ground deformation and the stress change caused by a pressure source embedded in a viscoelastic medium. In volcanic areas, the presence of inhomo-geneous materials and high temperatures produce a lower effective viscosity of the Earth's crust which calls for consideration of the thermal regime of crustal volume surrounding the ...

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