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.

Application of Transfer Matrix Method in Acoustics

G. Campa, and S.M. Camporeale
Politecnico di Bari, Bari, Italy

The Transfer Matrix method in the Acoustics Module of COMSOL Multiphysics is used when the whole system can be represented into a sequence of subsystems that interact only with adjacent subsystems. This method is frequently used in mathematics and, particularly, in acoustics. The application of the present method is really useful, because it permits to break the total system into a network of ...

3D Electromagnetic Field Simulation in Microwave Ovens: A Tool to Control Thermal Runaway

T. Santos[1], L.C. Costa[1,2], M. Valente[1,2], J. Monteiro[1,2], and J. Sousa[3]
[1]University of Aveiro, Portugal
[2]I3N, Aveiro, Portugal
[3]TEKA Portugal S.A., Ílhavo, Portugal

In microwave heating applications, the energy is introduced directly into the volume of the material and as consequence the quality of the process is highly dependent on the uniformity of the electromagnetic field distribution along it. That is, the non uniformity of the heating is a potential problem with serious consequences. Thermal runaway is the most critical, in materials with temperature ...

Numerical Study of a High Temperature Latent Heat Storage (200-300oC) Using Eutectic Nitrate Salt of Sodium Nitrate and Potassium Nitrate

C.W. Foong, J.E. Hustad, J. Løvseth, and O.J. Nydal
Department of Energy and Process Engineering, Norwegian University of Science and Technology, Trondheim, Norway

In this study, a small scale direct solar thermal energy storage system with secondary reflector is designed and developed. The main advantage of thermal energy storage is that cooking can be carried out during the time when there is little or no sun shine. In addition, no heat transport fluid is needed in this system. A well insulated heat storage should keep the heat for about 24 hours. KNO3 ...

Analysis Of Particle Trajectories For Magnetic Drug Targeting

A. Heidsieck, and B. Gleich
Zentralinstitut für Medizintechnik, TU München, München, Germany

The technique of magnetic drug targeting binds genetic material or drugs to superparamagnetic nanoparticles and accumulates them via an external magnetic field in a target region. However, it is still a challenge for this approach to succeed in areas with high flow rates, like the aorta or the heart ventricle. The magnetic field sources have to be accurately optimized and adapted to the local ...

Effective Thermal Conductivity of Composite: Numerical and Experimental Study

M. Karkri
Université Paris-Est, CERTES, Créteil Cedex, France

In this paper, thermal properties of composites are investigated numerically and experimentally. In the numerical study, finite-elements method in COMSOL is used to modelize heat transfer and to calculate the Effective Thermal Conductivity (ETC) of the composite for three elementary cells, such as simple cubic (SC), body centered cubic (BCC) and face centered cubic (FCC). The effect of the ...

Modelling the Effects of Temperature and Moisture Ingress on Capacitance and Dissipation Factor Measurements within Oil Impregnated Paper Transformer Bushings

D. Smith, S.G. McMeekin, B.G. Stewart, and P.A. Wallace
Glasgow Caledonian University, Glasgow, Scotland, United Kingdom

The majority of power transformer high voltage bushings today are of the condenser oil impregnated paper (OIP) type. The ingress of moisture, through the deterioration of the bushing over time, can result in a significant reduction in life and is a major failure mode of these bushings. Currently, the measurement of capacitance and dissipation factor is the most common method used to assess the ...

Modelling Flow through Fractures in Porous Media

E. Holzbecher[1], W.L. Wah[1], and M-S. Litz[2]
[1]Georg-August Universität Göttingen, Germany
[2]Freie Universität Berlin, Germany

There are various alternative options concerning modeling fluid flow within fractures in porous media. We give a general overview, with remarks concerning the modeling using COMSOL Multiphysics. Moreover we define and study two test cases for intercomparison. Finally for one of the testcases some results of an extensive sensitivity study is presented.

Combustion Of Kerosene-Air Mixtures In A Closed Vessel

C. Strozzi, P. Gillard, and J-M. Pascaud
Institut PRISME, Bourges, France

The aim of this work is to present a simple multiphysics simulation using COMSOL able to describe combustion of kerosene vapours in a closed vessel. The emphasis is on the mechanical effects of the reactive processes. The evolution of the thermodynamical variables (pressure, temperature, concentrations…) is obtained by solving several coupled transport equations for: the mass continuity, the ...

Modeling of Laser Processing For Advanced Silicon Solar Cells

G. Poulain[1], D. Blanc[1], A. Kaminski[1], B. Semmache[2], and M. Lemiti[1]
[1]Université de Lyon: Institut des Nanotechnologies de Lyon INL, CNRS, INSA de Lyon, Villeurbanne, France
[2]SEMCO Eng., Montpellier Cedex 5 - France

Silicon solar cells still require cost reduction and improved efficiency to become more competitive. New architectures can provide a significant increase in efficiency, but today most of the approaches need additional processing steps. In this context, laser processing offers a unique way to replace technological steps like photolithography that is not compatible with the requirements of the ...

From CT Scan to Plantar Pressure Map Distribution of a 3D Anatomic Human Foot

S. Gerbino, and P. Franciosa
University of Molise, School of Engineering, Via Duca degli Abruzzi, Termoli, Italy

Understanding the stress-strain behavior of human foot tissues and pressure map distributions at the plantar interface is of interest into biomechanical investigations. In particular, monitoring plantar pressure maps is crucial to establishing the perceived human comfort of shoe insoles. A 3D anatomical detailed FE human foot model was created, starting from CT (Computer Tomography) scans of a ...

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