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.

Heat Transfer During a CW Laser Crystallisation Process of a Silicon Thin Film on a Glass Substrate

Bourouga, B.1, Le Meur, G.1, Garnier, B.1, Michaud, J.F.2, Mohammed-Brahim, T.2
1 Laboratoire de Thermocinétique de Nantes
2 IETR – Groupe de Microélectronique-Université Rennes I

Development of new handling microsystems needs integration of field effect thin film transistors made directly on various low temperature substrates, as glass for example, with other functions. Argon laser is used to melt completely and then to crystallize 400 nm thick amorphous silicon films. However, the implementation of this process generates cracking and destruction of the silicon thin film ...

3D Modeling and Simulation of the Thermal Performance of Solid Cyclotron Targets

M. A. Avila-Rodriguez1, J. A. Sader1, and S. A. McQuarrie1,2
1Edmonton PET Centre, Cross Cancer Institute, University of Alberta, Edmonton, AB, Canada
2Faculty of Medicine and Dentistry, Division of Oncologic Imaging, University of Alberta, Edmonton, AB, Canada

COMSOL Multiphysics was used to model and simulate the thermal performance of solid targets irradiated with charged particles.Results showed that materials with a high thermal conductivity to heat capacity ratio behave better in cooling dynamic systems requiring fast dissipation of heat.

Modeling the Heat Treatment of a Starch Suspension inside a Tubular Heat Exchanger

A. Plana-Fattori[1,2], E. Chantoiseau[1,2], C. Doursat[1,2], and D. Flick[1,2]
[1]AgroParisTech, Massy, France
[2]INRA, Massy, France

Many liquid food processes involve coupled phenomena of fluid flow, heat transfer and product transformation. A typical example is the heat treatment of a starch suspension inside a tubular heat exchanger. Fluid flow influences heat transfer which determines temperature evolution along fluid trajectories. Temperature locally influences the food product transformation. The latter influences ...

Human Torso Model for Heat Transfer Analysis

X. Xu[1], T. Patel[1], R.W. Hoyt[1]
[1]U.S. Army Institute of Environmental Medicine, Natick, MA, USA

A human torso model was created for heat transfer analysis. The torso was derived from the ‘Virtual Family’ whole-body voxel data from the ITIS Foundation (Zurich, Switzerland). Measurements were taken from the ITIS male along the axial plane at key anatomical landmarks and used to develop geometry in Solidworks. Individual components were created to represent the skin, fat, muscle, and bone ...

Heat and Mass Transfer in Multilayer Fabrics

S. Quiniou1, F. Lesage1, V. Ventenat2, and M. A. Latifi1
1Laboratoire des Sciences du Génie Chimique, Nancy, France
2Centre de Recherche Decathlon, Villeneuve d'Ascq, France

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

Study of a Silicon Photodetector Thermal Stabilization using a Peltier Cell

E. Foschi1, C. Guandalini2, G. Levi1, L. Quadrani1, C. Sbarra 1,3, and M. Zuffa2
1Department of Physics, University and INFN, Bologna, Italy
2INFN, Bologna, Italy
3Centro Studi e Ricerche E.Fermi, Roma, Italy

In recent years, a new type of silicon photon detection devices (SiPM) has been developed. These devices have advantages in comparison to normal photomultiplier tubes (PMT), but being made by an array of avalanche photo diodes operated in Geiger mode, they are much more sensitive to temperature changes than standard PMTs. Typical SiPM gains vary from 3 to 5 percent per degree Centigrade. In space ...

Transient Pseudo-3D Model of Multi-Beam Laser Thermal Treatment System

J. Brcka
Technology Development Center
TEL US Holdings, Inc.
Albany, NY

Laser thermal treatment (LTT) systems have applications in IC fabrication for improving low-k dielectrics properties, polymer curing and resist processing. This contribution deals with a transient model of fast scanning and pulsing laser multi-beam system used in semiconductor processing. General Heat Transfer application mode formulation with multi-scale modelling approaches are employed. The ...

Optimization of Thermal Properties Identification of Complex Thin Films Using MATLAB® and COMSOL Multiphysics

N. Semmar[1], B. Wane[1]
[1]GREMI, UMR7344, CNRS-University of Orleans, Orléans Cedex 2, France

The importance of laser processing and thermal properties investigation of bulk materials and thin layers is still increasing. For thermal properties investigation many experimental systems were developed based on the photothermal effect. One of typical ways is to induce a rapid surface temperature increase is to use a pulsed laser beam, create a simplified model of this interaction, and compare ...

Interpretation of Measurements with Novel Thermal Conductivity Sensors Suitable for Space Applications

N. I. Kömle[1], G. Kargl[1], E. Kaufmann[2], J. Knollenberg[2], and W. Macher[1]
[1]Space Research Institute, Austrian Academy of Sciences, Graz, Austria
[2]DLR Institut für Planetenforschung, Berlin, Germany

Thermal conductivity of near surface soil layers is a key parameter for understanding the energy balance of planetary bodies. To measure this property, heated needle sensors are frequently used in field and laboratory applications. To adapt this type of sensors for application on space missions, various modifications have to be implemented. An example for such a modified sensor is the ...

Simulation of Heat Transfer on a Gas Sensor Component

Eldén, L., Domeij Bäckryd, R.
Department of Mathematics, Linköping University, Linköping

Heat transfer is simulated on a gas sensor component and its closest surroundings consisting of a carrier and bond wires mounted on a printed circuit board. The component is heated in order to improve the performance of the gas sensing element. Power dissipation occurs by all three modes of heat transfer; conduction from the component through bond wires and carrier to the printed circuit board as ...

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