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.

Analysis of magnetohydrodynamics GTAW arc behavior

Roger, F.
Ecole Nationale Superieure de Techniques Avancées, PARIS

Argon plasma behavior in gas tungsten arc welding (GTAW) is directly linked to the weld quality. Indeed, the arc is the heat source which drives the weld shape. Solution of an induction-diffusion equation under axial symmetry conditions has been developped using thermal conduction and convection module of FEMLAB 3.1©. We predict current distribution in electric arc, induced magnetic field ...

Elastoplastic Models of the Interaction between Active Fronts of the Southern Alps and Dinarides (NE Italy and NW Slovenia)

M. Coccia[1], E. Carminati[1], F. Rolandone[2], M. Battaglia[1], D. Zuliani[3], and P. Fabris[3]
[1]Università La Sapienza, Roma, Italy
[2]Université Pierre et Marie Curie, Paris, France
[3]Centro Ricerche Sismologiche, Udine, Italy

We use GPS measurements and Finite Element analysis to investigate strain accumulation in the interaction between active fronts of the Southern Alps and Dinarides at the northern edge of the Adriatic micro-plate. We develop a three dimensional model of the area taking into account the regional topography, approximating the crust as an elasto-plastic medium and reproducing as close as possible the ...

Measuring the Spectra of Metamaterials at an Oblique Incidence

X. Ni[1,2], Z. Liu[1,2], and A.V. Kildishev[1,2]
[1]School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana, USA
[2]Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana, USA

The emergence of electromagnetic metamaterials has given rise to a variety of fascinating applications, including the perfect lens and the optical cloaking device. For a long time the study of the properties of metamaterials was limited to normal incidence only. However, it is extremely important to know the behavior of metamaterials especially in the area of imaging. In this paper, we use COMSOL ...

Oil Discharge and Transport in a Natural River

Tomas Ekström1,Klara Linden2
1Carl Bro AB Energy, 2Lunds University

A discharge of hydraulic oil is assumed from an hydroelectric power station. The oil is let out through the outlet from the turbines and is spread into the river. The flow of water, or more correctly, the solution of water and oil, is calculated by Navier-Stoke equation for incompressible fluids. The concentration of oil is calculated by a mass-balance equation. It is assumed that oil is absorbed ...

Towards a Finite Element Calculation of Acoustical Amplitudes in HID Lamps

B. Baumann[1], M. Wolff[1], J. Hirsch[2], P. Antonis[2], S. Bhosle[3], and R. Valdivia Barrientos[4]
[1]Hamburg University of Applied Sciences, Hamburg, Germany
[2]Philips Lighting, Eindhoven, The Netherlands
[3]LAPLACE, Université de Toulouse and CNRS, Toulouse, France
[4]National Institute of Nuclear Research, Salazar, Ocoyoacac, Mexico

High intensity discharge lamps can experience flickering and even destruction, when operated at high frequency alternating current. The cause of these problems has been identified as acoustic resonances inside the lamp’s are tube. Here, a finite element approach for the calculation of the acoustic response function is described. The developed model does not include the plasma dynamics.

Using COMSOL Multiphysics in Advanced Engineering

Advanced Computational & Engineering Services
Columbus, Ohio

In this presentation we give a thorough introduction to advanced engineering using COMSOL Multiphysics. We introduce you to many disciplines of engineering and physics as well as multidisciplinary, multiscaled multiphysics.

Computation of the Longitudinal Dispersion Coefficient in an Adsorbing Porous Medium Using Homogenization

A. Rijnks[1], M. Darwish[2], and H. Bruining[3]
[1]StatoilHydro ASA, Bergen, Norway
[2]Shell Exploration & Production International Centre, Rijswijk,
The Netherlands
[3]Section of Geoengineering, Faculty of Civil Engineering and Geosciences, TU Delft, Delft, The Netherlands

The method to derive upscaled expressions for the dispersion coefficients for reactive flow in a porous medium uses a periodic unit cell (PUC), which consists for instance of a spherical grain in a cube, but nothing prohibits defining more complex PUC's. Homogenization leads to a coupled system of equations where the flow is described by Stokes equation and the concentration fluctuation is ...

Computer Modelling of Deformable non-Newtonian Flow using COMSOL Multiphysics

H.A. Lecuyer[1], F.H. Bertrand[1], P.A. Tanguy[1], J.P. Mmbaga[2], and R.E. Hayes[2]
[1] Ecole Polytechnique , Montreal
[2] University of Alberta, Edmonton

This presentation is concerned with the modelling of deformable non-Newtonian Flow using COMSOL Multiphysics. This general modelling approach has more concrete applications such as paper coating in a metering size press, meniscus location by PIDS to mention a few.

Simulation of Incompressible Flow through Rhombohedric Pores

R. Viola[1][3], F. Zama[2], M.Tuller[3], and E. Mesini[1]

[1]DICMA, University of Bologna, Bologna, Italy
[2]Dep. of Mathematics, University of Bologna, Bologna, Italy
[3]Dep. of Soil, Water, and Environmental Science, University of Arizona, Arizona, USA

Advances in visualization and discretization of pore structures by means of Computed Tomography, and rapidly increasing computational capabilities, allow numerical modeling of pore-scale fluid flow based on the incompressible Navier-Stokes equations rather than using a macroscopic approach based on Darcy’s law. To test the capabilities of the COMSOL Multiphysics modeling platform, we ...

Inlay Fixed Partial Denture Framework 3-D Structural Integrity Validation Using COMSOL Multiphysics®

T.M.R. Alho[1]

[1]Department of Electrical Engineering and Automation, University of Vaasa, Vaasa, Finland

Manual manufacturing of inlay fixed partial denture frameworks by metal casting can take hours of dental practitioners work time. This paper introduces 3-D simulations of premanufactured inlay fixed partial denture framework assembled from laser cut sheet metal parts. The study gives a good estimation of how well the frameworks can withstand strong human occlusion forces and masticatory cycle. ...

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