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.

Error Analysis in Estimating Temperature-Dependent Thermal Diffusivity and Kinetic Parameters using Heat Penetration Data

K.D. Dolan[1,2], A.R. Sommerlot[1], and D.K. Mishra[1]
[1]Department of Biosystems and Agricultural Engineering, Michigan State University, East Lansing, Michigan, USA
[2]Department of Food Science and Human Nutrition, Michigan State University, East Lansing, Michigan, USA

Growing consumer demand for nutraceuticals has stimulated interest by food companies to increase levels of these health-promoting compounds. Thermal processing of canned foods in a retort produces a unique problem: some of the nutraceuticals are highly sensitive to temperature, and require accurate parameter estimates to predict their fate during processing. Error in temperature measurement due ...

Deformable Medical Image Registration using the Finite Element Method

J. Li, and T.C. Zhu
Department of Radiation Oncology, University of Pennsylvania

Deformable medical image registration is studied with two models developed using COMSOL Multiphysics. One is based on the plane strain application mode and the other on the moving mesh (ALE) application mode. The models are examined by registering gross target volumes of a head-neck tumor with two sets of CT images. The comparison shows that the registration using the moving mesh (ALE) ...

Chargenwärmebehandlung von Stahl

J. Siebert[1], W. Muschik[2], H. Apel[3], and W. Koch[4]
[1] Technologieprojekte, Magdeburg
[2] Technische Universität, Institut für Theoretische Physik, Berlin
[3] FH Magdeburg-Stendal, Technische Betriebswirtschaft, Magdeburg
[4] Rothenseer Werkstoffprüfung und -bearbeitung GmbH, Geschäftsführung, Magdeburg

Schwerpunkte dieses Vortrages bilden die Verknüpfungen folgender Themenkomplexe: • Werkstoffwissenschaft • Energieverfahrenstechnik • Qualitätsmanagement • Polyoptimierung Für derart umfassende Aufgabenstellungen gibt es zur Zeit keine Softwarelösungen. So ist z.B. die Kundenforderung nach Garantie erhöhter Schlagarbeit bei stark abgesenkten negativen Temperaturen in keinem ...

Educational and Industrial Multiphysics Modeling in Czech Republic

K. Bittner

Humusoft was founded in 1990 and has been a representative for COMSOL since 1999, for several countries in Eastern Europe. In this presentation we begin with a short overview of the and historical milestones for Humusoft. The essence of this presentation concerns the wide ranging branches in which COMSOL Multiphysics is used from the Automotive industry to the Medical. From the corporate ...

Virtual Prototyping

Björn Engquist
Royal Institute of Technology, Stockholm and University of Texas
Austin, USA

Virtual prototyping is used for understanding, verifying, planning, controliing, and optimizing a technical application. It the industrial component computational science and engineering and can be called "the third pillar of modern science". The future of virtual prototyping will be multiscale and multiphysics models and simulations. --------------------------------- Keynote speaker's ...

Assessment of Hemodynamic Conditions in a-v Fistulas using CFD

A. K. Niemann1,5, S. A. Kock1, J. V. Nygaard2, E-T. Fründ3, S. E. Petersen4, and J. M. Hasenkam5
1 MR-center, Aarhus University Hospital Skejby, Aarhus, Denmark
2Interdisciplinary Nanoscience Center, Faculty of Science, University of Aarhus, Skejby, Denmark
3Dept. of Radiology, Aarhus University Hospital, "Aalborg Sygehus Syd", Aalborg, Denmark
4Dept. of Urology, Aarhus University Hospital Skejby, Aarhus, Denmark
5Dept. of Cardio-Thoracic and Vascular Surgery, and Clinical Institute, Aarhus University Hospital Skejby, Aarhus, Denmark

Using Computational Fluid Dynamics, different geometries of side-to-side a-v fistulas for hemodialysis access are evaluated. We created five CAD-models of fistulas with the length of the anastomosis varying from 5 to 15 mm. The five models were analyzed and evaluated using the k-ε turbulence application mode in COMSOL Multiphysics to determine if an optimal length of anastomosis exists. ...

Design of heat flux microsensor assisted by COMSOL for the study of energy transfer on Si and Cu thin samples

L. Bedra, N. Semmar, A.-L. Thomann, R. Dussart, J. Mathias, and Y. Tessier
GREMI, CNRS-Université d'Orléans, Orléans, France

A commercial heat probe is used for energy transfer measurements on copper and silicon substrates. To do so, the micro sensor has to be calibrated under high vacuum (~10-7 mbar), using a homemade black body as a heat source.Although the HFM is cooled at 5 oC, the solid surface temperature is unknown as the thermal contact resistance. Thus, COMSOL simulations are also used to obtain reliable ...

Channels and Melting in Deformable Porous Media

S. L. Butler

Department of Geological Sciences, University of Saskatchewan, SK, Canada

Partial melting occurs beneath mid-ocean ridges in Earth's mantle and the resulting liquid migrates to the surface to form a new oceanic crust. In this system, mass can be exchanged between the liquid and solid phases through melting and solidification and, at the high temperatures and pressures associated with the Earth's interior, the solid matrix deforms through the process of compaction, ...

Electrical Impedance Sensor to Detect Tunnels and Infrastructure in Soil  

R. Gamache, and D. Spinelli
TransTech Systems, Inc., Schenectady, NY, USA

Tunnels and their detection have been a problem in warfare since the ancient world. Recent events have highlighted the ongoing problems of tunnels and the difficulties in locating them, not only in military situations, but also in law enforcement and homeland security applications as well. Electromagnetic and acoustic or seismic techniques may provide the significant advantage of a mobile non ...

Simulation of the Shape of Micro Geometries Generated with Jet Electrochemical Machining

M. Hackert[1], G. Meichsner[2], and A. Schubert[1,2]
[1]Micromanufacturing Technology, Chemnitz University of Technology, Chemnitz, Germany
[2]Fraunhofer Institute of Machine Tools and Forming Technology, Chemnitz, Germany

Electrochemical Machining with a closed electrolytic free jet is a special procedure to generate complex micro structures by help of anodic dissolution. The work piece shape is fabricated by supplying an electrolytic current through an electrolyte jet ejected from a small nozzle. In this study COMSOL Multiphysics is used to simulate the electric current density in the jet and the dissolution ...

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