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.

COMSOL Implementation of Valet-Fert Model for CPP GMR devices

T. Xu[1], C.K.A. Mewes[1], S. Gupta[2], and W.H. Butler[1]
[1]Department of Physics and Astronomy and Center for Materials for Information Technology, University of Alabama, Tuscaloosa, Alabama, USA
[2]Department of Metallurgical and Materials Engineering and Center for Materials for Information Technology, University of Alabama, Tuscaloosa, Alabama, USA

The Giant Magneto Resistance (GMR) effect is a quantum mechanical effect which can be observed in systems consisting of thin alternating ferromagnetic and non-ferromagnetic layers. Simulation using COMSOL allows the evaluation of the magneto-resistance ratio and the electrical resistances of realistic CPP-GMR devices and opens the possibility to study new device materials and designs.

Modeling Dispersal of Genetic Information in Structured Agricultural Landscapes with Partial Differential Equations

K. Lipsius, and O. Richter
Institute of Geoecology, TU Braunschweig, Germany

We present a model for plant dispersal in agricultural landscapes to evaluate the gene dispersal from genetically modified (GM) plants. Dispersal from seed and pollen is modeled with partial differential equations. In scenarios, we investigated the effect of roadside application of non-selective herbicides on dispersal of herbicide tolerant oilseed rape (HT OSR). We showed that OSR growing on ...

Investigations on Hydrodynamic in Stirred Vessels for Educational Purposes

A. Egedy, T. Varga, and T. Chován
University of Pannonia
Department of Process Engineering
Veszprém, Hungary

With detailed hydrodynamic modelling of a system the critical parameters and operation limits can be determined. In the field of fluid dynamic and reactor engineering one of the most important aspects is the practical knowledge of future engineers and technicians. In our research several different reactor constructions and impeller configurations were modelled to achieve a better ...

COMSOL as an Aid in the Teaching (Learning) of Heat Transfer

R. López[1], J. Morales*[1], M. Vaca[1], A. Lizardi[1], H. Terres[1], G. Bautista[1], A. Lara[1]
[1]Universidad Autonoma Metropolitana, Tlalpan, Distrito Federal, Mexico

Several undergraduate programs include the “Heat transfer” subject and, in our experience, it is hard for the students to grasp the concepts that are presented in the course. With this in mind, we designed and constructed an apparatus for the experimentation of heat transfer in a short bar. It was observed, that the time required to perform the experiment was so long, that the didactic aim ...

Computation of Three-Dimensional Electromagnetic Fields for an Augmented Reality Environment

A. Buchau, and W. Rucker
Institut für Theorie der Elektrotechnik, Universität Stuttgart, Germany

Augmented reality is predestined for visualization of electromagnetic fields in air or inside transparent matter. Real existing objects are studied and invisible electromagnetic fields are added as virtual objects. Hence, experts as well as students are able to connect electromagnetic fields easily with studied objects. They can concentrate on physical effects instead on reading figures. Here, an ...

Using COMSOL for Smart Determination of Material Properties Using Inverse Modeling Techniques

J. van Schijndel, S. Uittenbosch, and T. Thomassen
Eindhoven University of Technology
Eindhoven, Netherlands

The paper presents the development of a method that determines building material and surface properties using relative simple and low-budget experiments, The method comprehends an optimal design of an experimental set up for smart determination of heat and moisture properties using both normal and inverse modeling techniques. It is concluded that the suggested methodology of the inverse ...

Ausbreitung von Populationen und Genetischer Information in Landschaften

Richter, O.
Institut für Geoökologie der Technischen Universität, Braunschweig

Kontinuierliche populationsdynamische Modelle lassen sich durch Systeme von gewöhnlichen Differentialgleichungen darstellen. Die räumliche Ausbreitung wird durch parabolische partielle Differentialgleichungen beschrieben, im einfachsten Fall durch eine Konvektions-Dispersionsgleichung. Für gekoppelte Populationen erhält man damit ein System von Reaktions-Diffusionsgleichungen mit erheblichen ...

Implementation of FEMLAB in S-Functions

van Schijndel, A.W.M.J.
Technische Universiteit Eindhoven, Netherlands

FEMLAB has standard facilities to export models to Simulink. Normally, the standard export works well if the solvers, available in Simulink, can handle the problem. However, if a model in FEMLAB needs special solvers, for example airflow or other non-linear problems, the standard export to Simulink is often not suitable, because the standard solvers of Simulink cannot handle such a problem ...

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 ...

Resonating with Students in the Undergraduate Physics Laboratory: Comprehending Acoustic Vibrations

K. Stein, R. Peterson, J. Houlton, J. Knapp, B. Peplinski, C. Scheevel, and D. Swenson
Department of Physics, Bethel University, St. Paul, MN, USA

Acoustic vibrations are studied for several objects through the application of computational and optical diagnostic techniques. Computational studies are carried out using the eigenfrequency analysis option in the COMSOL structural mechanics application mode, whereas experimental optical studies utilize real-time stroboscopic holography. The two approaches provide complementary descriptions ...

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