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.

Modelling Electric Fields in High Voltage Submersible Changeover Switch

K. Follesø
Bennex AS, Bergen, Norway

Controlling electric field distribution in high voltage components is critical to avoid excessive electric stress on the insulation and thus reducing the risk of insulation breakdown and damage to equipment. For subsea applications this is even more important due to the costs involved in accessing and replacing the damaged parts. This paper describes how COMSOL Multiphysics has been used for ...

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 ...

Numerical Simulation Of Laminar Flow Above And Below Triangular Bedforms

C. Gualtieri
University of Napoli Federico II, Naples, Italy

This paper presents some results of numerical simulations carried out to investigate the basic hydrodynamic interactions between the laminar flow in the water column above triangular bedforms and the Darcian flow in the underlying permeable sediments. The flow was described by the Navier-Stokes equation in the free region and the Darcy equation in the porous region. Numerical simulations were ...

Mechanical Behaviour of TiAl Spherical Particles Including Friction Effect

G. Maizza, R. Cagliero, and A. Santoro
Dipartimento di Scienza dei Materiali ed Ingegneria Chimica, Politecnico di Torino, Torino, Italy

Powder metallurgy is a key technology for manufacturing advanced components based on TiAl alloys. Cold compaction is the primary step to produce green parts. Cold deformation of TiAl powder is difficult due to its typical poor ductility. Plastic deformation and cracking susceptibility of TiAl powder strongly depends on micro-mechanical phenomena. To manage real compaction problems more reliable ...

Simulation of Flaw Signals in a Magnetic Flux Leakage Inspection Procedure

O. Nemitz, and T. Schmitte
Salzgitter Mannesmann Forschung GmbH, Duisburg, Germany

In the inspection of steel products with respect to flaws a magnetic flux leakage (MFL) test procedure can be applied. In this procedure a “horseshoe” shaped yoke is used, whose legs are wrapped with coils through which an alternate current with a high frequency (3 kHz) is flowing. Hereby a thin magnetic field is induced near the surface of the test object which leaks from the material if a ...

Aerodynamic Study For Air To Gas Leakage Reduction In A Typical Rotary Regenerative Air Preheater Of Coal-Fired Steam Generators

L. Ferravante[1], C. Zagano[1], and V. Marra[2]
[1]RSE S.p.A. - via Rubattino, Milano, Italy
[2]COMSOL S.r.l. - Via Vittorio Emanuele II, Brescia, Italy

The present study relates to the reduction of the amount of air to gas leakage in a typical rotary regenerative air preheater of coal-fired steam generators, by means of computational thermo-fluid-dynamics. Due to the gaps, or clearances, required for rotation, there is a significant amount of leakage of the higher pressure air to the lower pressure gas stream. This paper presents a turbulent CFD ...

Simulation of the Self Assembly of a Microchip on a Structured Surface using the Phase Field Method

N. Boufercha, M. Ghahremanpour, M. Schnaithmann, J. Sägebarth, and H. Sandmaier
Universität Stuttgart / IFF-MST, Nobelstr.12, Stuttgart, Germany

The presented paper describes a method for micro precision assembly of very small objects like future microchips, which have a lateral expansion equal to or smaller than 500 μm. The modelling and simulation of a fluidicbased micro assembly method for a microchip with a dimension of (500 x 500 x 100) μm3 is performed with COMSOL Multiphysics. The finite element method is used for ...

Heat Transfer Model for Embedded Thermocouple in Firefighter Glove

D. Mrugala, T. Riebeck, and W. Lang
Institute for Microsensors, -actuators and –systems (IMSAS)
University of Bremen
Bremen, Germany

The Integration of contact heat measurement with intelligent fire fighter gloves assumes parametric simulations with the heat transfer module of COMSOL. A thermocouple is embedded into high temperature protective layers of the glove and measures contact heat. This is done by by pressing the hand backside of the glove against a hot device like a door. The Heat transfer module has been used to ...

La5Ca9Cu24O41 Layers as 1D Heat Spreaders for Thermal Management Solutions

C. Orfanidou, and J. Giapintzakis
Department of Mechanical and Manufacturing Engineering
University of Cyprus
Nicosia, Cyprus

This paper deals with the design of a viable thermal management solution using La5Ca9Cu24O41 layers for heat channeling. The simulations are carried out with the finite element method using COMSOL Multiphysics Heat Transfer Module. COMSOL 4.2 was used to model and optimize silicon devices. Malfunctioning elements on silicon devices are sometimes converted into hotspots resulting in the ...

Numerical Experiments for Thermally-induced Bending of Nematic Elastomers with Hybrid Alignment

L. Teresi[1], and A. DeSimone[2]
[1]LaMS - Modeling & Simulation Lab, University Roma Tre, Roma, Italy
[2]SISSA - International School for Advanced Studies, Trieste, Italy

We deal with Liquid Crystal Elastomers (LCEs) having hybrid alignment (HNEs), that is, fabricated with a given non-homogeneous nematic orientation. For such a materials, permanent distortions induced by deswelling can be compensated by those resulting from cooling below the transition temperature, thus yielding the possibility of producing temperature-driven actuators. Here, we simulate the ...

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