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.

Image-Based Simulation of Electrical Impedance Techniques Applied on the Human Thorax for Cardio-Pulmonary Applications

F.K. Hermans[1], R.M. Heethaar[1], R.T. Cotton[2], and A. Harkara[2]


[1]VU University Medical Center, Amsterdam, The Netherlands
[2]Simpleware Ltd., Exeter, United Kingdom

For medical diagnostic purposes there is an increasing need for non- (or minimal) invasive techniques to measure all kinds of parameters that can provide insight in the functioning of cells, organs or organ systems. Currently, Impedance Cardiography (ICG) is used for measurements of the heart and Electric Impedance Tomography (EIT) is used for investigating lung tissue condition. This paper ...

Current Density Simulations in the Electrodeposition from Ionic Liquids: Effects of the Conductivity

I. Perissi[1], C. Borri[1], S. Caporali[1], and A. Lavacchi[1]
[1]Department of Chemistry, University of Firenze, Sesto Fiorentino, FI, Italy

The overall goal of this work is the use of COMSOL Multiphysics® in the modeling of the current density distributions for the electrodeposition of aluminum coatings from ionic liquids. The local current distribution is strongly dependant on the conductivity and on the geometry of the galvanic cell and can only be computed by the numerical solution of the partial differential equations ...

Simulation of Evaporating Droplets on AFM-Cantilevers II: Confocal Microscopy and Transversal Bending

T. Haschke[1], E. Bonaccurso[2], H.J. Butt[2], F. Schönfeld[3], and W. Wiechert[1]
[1] Universität Siegen, Lehrstuhl für Simulationstechnik, Siegen
[2] Max-Planck-Institut für Polymerforschung, Mainz
[3] Institut für Mikrotechnik Mainz GmbH, Mainz

The evaporation process of microscopic drops was investigated by depositing them onto atomic force microscope (AFM) cantilevers and measuring the deflection of the cantilever in response to the presence of the drop. We could thus improve a previously presented FE simulation model by comparing the simulations of the cantilever’s transversal deflection to 3-D images of the cantilever’s ...

Fast Computation of Capacitance Matrix and Potential Distribution for Multiconductor in Non-Homogenous Multilayered Dielectric Media

S.M. Musa[1], and M.N.O. Sadiku[1]

[1]Prairie View A&M University Networking Academy, Prairie View, Texas, USA

This paper presents the fast computational and modeling of multiconductor transmission lines interconnect in non-homogenous multilayered dielectric media using the finite element method (FEM). We illustrate the potential distribution of the multiconductor transmission lines for the models and their solution time. We compared some of our results of computing the capacitance matrix with method of ...

Stability and Bifurcation of Cathode Arc Attachment in AC Operated High-Intensity Discharge Lamps

A. Lenef
Osram Sylvania

High-intensity discharge (HID) lamps are highly-efficient light sources with many applications. Depending on the dimensions of the electrode, lamp current, and waveforms, the plasma may attach to the cathode in a diffuse mode, that covers the electrode tip surface, or a localized mode where heating and current transfer occur in a local region of the electrode surface. The localized mode is ...

Simulation of Electromagnetic Stirrers and Brakes Applied in the Metallurgical Field

C. Mapelli
Politecnico di Milano

The control of the flux within continuous casting systems used in the metallurgical field can be obtained through the application of electromagnetic. The model here has been solved through a linear time-harmonic solver. The results of the electromagnetic model have then been applied to the fluid-mechanics model through volume Lorentz forces.

Taking COMSOL Multiphysics Beyond Traditional Finite Elements

John Dunec
COMSOL Inc.
Palo Alto, USA

This talk will give you some tips and tricks for using techniques in COMSOL Multiphysics that you might not have known about. --------------------------------- Keynote speaker's biography: John Dunec received his Ph.D. from Stanford, specializing in numerical simulation of thermal-fluid systems. He has over two decades of experience in the field: first as a product engineer and manager at ...

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 ...

Optimum Design of Dual-modality Sensing Electrode Array

W. Huaxiang, W. Jing, H. Li, and J. Weiwei
School of Electrical Engineering & Automation, Tianjin University, Tianjin, Taiwan

Sensing electrodes array model of 3-Dimensional ERT/ ECT dual modality is established by using the software COMSOL. According to the uniformity of sensitivity field distribution, the correlation coefficient and the reconstructed image space resolution, the ECT/ERT dual modality sensing electrode arrays are optimized. Experimental results show that the optimized sensing electrode array of the ...

Computation of Space-Time Patterns via ALE Methods

V. Thümmler1, and A. Weddemann2
1Department of Mathematics, Bielefeld University, Bielefeld, Germany
2Department of Physics, Bielefeld University, Bielefeld, Germany

Partial differential equations which exhibit solutions that are spatial temporal patterns are often found in biological and chemical systems, e.g. when describing pattern formation in reaction-diffusion systems.Special classes of such patterns are relative equilibria and relative periodic orbits, which are solutions that in an appropriately co-moving frame of reference are stationary and ...

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