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 Burning Candle

J.S. Crompton, L.T. Gritter, S.Y. Yushanov, and K.C. Koppenhoefer
AltaSim Technologies LLC, Columbus, OH, USA

Analysis of burning candles is extremely complex; combustion produces a highly non-linear temperature profile through the flame in which local temperatures may exceed 1400 °C. Heat transfer includes radiation, conduction and convection components and the low melting point of the candle wax leads to a phase change that allows mass transport via capillary flow prior to combustion in the flame. ...

Numerical Computation of Two-Phase Flow in Porous Media

D. Droste[1], F. Lindner[1], C. Mundt[1], M. Pfitzner[1]
[1]Universität der Bundeswehr, Munich, Bavaria, Germany

In this study we investigate the heat and mass transfer in a porous media with phase change. The liquid fluid is injected from one side and heated from the other side, where it leaves the porous material in a gaseous state. Dominant forces are capillary interactions and two-phase heat conduction. To model the process we use a two-phase mixture model on a macroscopic scale. This model is ...

Modeling Residual Stresses in Arc Welding

F. Roger[1], and A. Traidia[2]
[1]ENSTA Paristech, Paris, France
[2]AREVA NP, Saint Marcel, France

The prediction of mechanical response of assemblies during arc welding necessitates the knowledge of thermal history of the components and the constitutive behavior of the materials. COMSOL can simulate thermal and structural interaction but it needs to evaluate the time evolution of internal variables like viscoplastic strain and hardening parameters. In the present paper we extend the ...

Pedagogic use of COMSOL Multiphysics for Learning Numerical Methods and Numerical Modeling

J-M. Dedulle
L'ecole Nationale Supérieure de Physique de Grenoble

The students at ESPNG have, since 2002, been using COMSOL Multiphysics in order to master physical phenomena and the finite element method. We developed several projects based on the modeling of physics phenomena, and, in this paper, we present projects based on Physical Vapor Transport and Magnetic Levitation. --------------------------------- Keynote speaker's biography: Jean-Marc ...

Thermal Simulations of a LED Light Using COMSOL Multiphysics

M. Maaspuro[1]
[1]University of Turku, Turku, FInland

An experimental LED light composed of a multi-chip LED-module, a LED driver and an efficient heat sink, was investigated using COMSOL Multiphysics software and the Heat Transfer Module. In an LED light heat is mainly generated in the LEDs but some amount of heat is generated also in the LED driver. The main target of the simulations was to resolve the junction temperatures of LEDs, the most ...

Heat Transfer and Phase Transformation on Matrix Assisted Pulsed Laser Evaporation (MAPLE) of Biocompatible Thin Layers

E. Lacatus[1], G.C. Alecu[1], M.A. Sopronyi[2], A. Tudor[1]
[1]POLITEHNICA University of Bucharest, Bucharest, Romania
[2]INFLPR -National Institute for Laser Plasma and Radiation Physics, Bucharest, Romania

Matrix Assisted Pulsed Laser Evaporation (MAPLE) technique is used for the deposition of high quality biocompatible polymer thin films. During the deposition process the temperature of the laser target should be kept below 193K to assure the proper quality of both evaporation and deposition phases of the process. On a first approach COMSOL Multiphysics® was used to describe and analyze the ...

Analysis of Thermoelectric Phenomena

J. Crompton, S. Yushanov, L. Gritter, and K. Koppenhoefer
AltaSim Technologies, LLC.
Columbus, OH

Thermoelectric phenomena provide the direct conversion of heat into electricity or electricity into heat, the phenomena is described by three related mechanisms: the Seebeck, Peltier and Thomson effects. Thermoelectric devices have found many applications ranging from temperature measurement, solid state heating or cooling and direct energy conversion from waste heat. In this paper, analysis ...

Modeling a Combined Photovoltaic-Thermal Panel

E. Gutierrez-Miravete[1], B. Fontenault[2]
[1]Rensselaer Polytechnic Institute, Hartford, CT, USA
[2]General Dynamics-Electric Boat, Groton, CT, USA

A novel combined photovoltaic-thermal panel can simultaneously increase the conversion efficiency of the PV cell and utilize some of the excess thermal energy created by the conversion process (see Figure 1). The Conjugate Heat Transfer physics in COMSOL was used to create a two-dimensional, steady state model of such a combined photovoltaic cell-thermal panel. Figure 2 shows a magnified view of ...

Numerical Simulation of Phonon Dispersion Relations for Phononic Crystals

G. Zhu[1], E.M. Dede[1]
[1]Toyota Research Institute of North America, Ann Arbor, MI, USA

In previous work, a two-dimensional (2D) model was carried out to simulate the phononic band structure of a phononic crystal with square lattice structure, but this model did not account for the out-of-plane phonon dispersions [1]. In fact, for 2D films used for coating materials, it is more interesting to understand their cross-plane properties. In this work, the phonon dispersion relation of 2D ...

Modelling of Pressure Profiles in a High Pressure Chamber using COMSOL Multiphysics

P. S. Rao[1], C. K. Chandra[1]
[1]Agricultural and Food Engineering Department, Indian Institute of Technology Kharagpur, West Bengal, India

High Pressure Processing (HPP) is a leading non-thermal food processing technology that is often cited as a major technological innovation in food preservation. Although it is very early to place this emerging technology among the list of breakthroughs in food processing, HPP has started to become a viable commercial alternative for pasteurisation of value added fruits, vegetables, meat, and ...

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