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.

Calibrating electric instruments of the Huygens probe and modelling the dielectric properties of the atmosphere and of the surface of titan

Simões, F.
Centre d'Etude des Environnements Terrestre et Planétaires (CETP), Saint Maur des Fossès, France

In 14 January, 2005, the Huygens Probe has descent through the atmosphere of Titan and has survived to touchdown, collecting data in the atmosphere and on the surface of the largest moon of Saturn. One of the instruments, the Huygens Atmospheric Structure Instrument (HASI), includes the Permittivity, Waves, and Altimetry (PWA) analyser, which is a subsystem for studying the electric activity of ...

FEMLAB modules for bioengineering education

Butler, P.J.1, Ferko, M.C.2
1 Department of Bioengineering, Penn State University
2 Stryker Orthopedics Corporation

As biologists uncover the structural and functional complexity of living organisms, it is increasingly clear that mathematical models are needed to synthesize experimental data and predict biological responses to external stimuli. Bioengineers are well-suited to develop such models and to add mechanics, fluid flow and other physical cues to the understanding of biological structure and ...

Stabilized Finite Element Modeling of the Flow Through Porous Medium

Khodabakhshi, G., Parvazinia, M.
Loughborough University, U.K.

The standard Galerkin method employing standard finite elements is not a robust approach for transport problmes exhibiting multiscale behaviour [1]. The elements enriched with bubble functions improve the stability of the solution dramatically. It is shown that basically all of stable methods are derived from particular class of subgrid scale models [2]. To prevent it, multiscale finite ...

Rigid Inclusion Rotation in Viscous Shear Flow

Taborda, R.1, Ornelas Marques, F.1, Bose, S.2
1 Dep. Geologia and LATTEX, Fac. Ciências, Univ. Lisboa, Lisbon, Portugal
2 GEOMODELS and CGUL, Fac. Ciências, Univ. Lisboa, Lisbon, Portugal

Theoretical and experimental studies on the rotation of rigid inclusions under simple shear flow have typically considered infinite width shear zones and perfect attachment of inclusion to the matrix. According to these models, during progressive simple shear a coherent object would continuously rotate synthetically, which is not the case in many natural ductile shear zones. In this work we ...

Water spreading anaysis on fabrics surfaces

Fichet, D.1, Lesage, F.1, Ventenat, V.2, Latifi, M.A.2
1 Laboratoire des Sciences du Génie Chimique, CNRS-ENSIC, Nancy Cedex, France
2 Centre de recherche Decathlon, Villeneuve d’Ascq, France

This paper deals with experimentation, modelling, simulation and optimisation of a Moisture Management Tester (MMT) which is used to determine the liquid spreading and transfer rates of a fabric. A 3D model was developed and implemented within FEMLAB. It consists of partial differential equations describing the mass balance of water adsorbed on the fibres and water moving in the free volume ...

A Domain Decomposition Algorithm for Dissipative or non Dissipative Acoustic Cavities

Balabane M.
University Paris 13 - Math. dpt.

This note is devoted to a domain decomposition method solving the Helmholtz equation in the frequency domain. We need to perform this global computation as a sequence of local computations, each computation being performed on a single subdomain, without any knowledge of the geometry and meshing of the other subdomains. This is useful when the global geometry is too big to be stored in a single ...

Simulation of electrokinetic instabilities using COMSOL Multiphysics

Carl Meinhart
University of California Santa Barbara
Santa Barbara, USA

This presentation shows a number of models of electrokinetic behaviour, each differentiated by a specific assumption. The purpose is to show how such assumptions can lead to varying results in elektrokinetic simulations. --------------------------------- Keynote speaker's biography: Professor Meinhart completed his Ph.D and Postdoctoral work at the University of Illinois in June of 1995. At ...

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