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.

Simulation and Verification of a Capacitive Proximity Sensor

T. Schlegl, and H. Zangl
Graz University of Technology
Graz, Austria

State of the art proximity sensors are most often based on optical or tactile methods. Although these sensor systems are widely used (e.g. clamping protection) the reveal several drawbacks. Most optical sensors need a line of side whereas tactile sensors cannot be used to determine a distance to an approaching object. Capacitive sensing technology has proven to be an interesting alternative to ...

Introduction to COMSOL based Modeling of Levitated Flywheel Rotor

A. Pilat
AGH University of Science and Technology
Kraków, Poland

This elaboration presents a pre-study on automatic rotor construction for the flywheel energy storage system dedicated to operate in the levitation mode. The optimization profile model is used as a basic profile source. The 3D flywheel shape is generated on the base of obtained profiles. Eigenfrequencies are calculated to validate the operation on rigid mode. A steel and aluminum based ...

Impedance measurements in reinforced concrete and 3D FEM simulations

Nogueira, A.1, Nóvoa, X.R.1, Keddam, M.2, Vivier, V.2
1 Universidade de Vigo (E.T.S.E.I.) Spain
2 UPR 15 CNRS “LISE”, case 133 - Université P. & M. Curie, Paris, France

The electrochemical impedance spectroscopy (EIS) measurements in reinforced concrete are reported and compared with 3D-finite element simulations with FEMLAB software. It was shown that the current injected in the cement past was partially collected by the reinforcement. Moreover, from both experimental results and calculations, it was shown that the fraction of current collected depends on the ...

Calculation of the Magnetic Field Intensity in a Rectangular Conductor Carrying Current in Electromagnetism Introductory Courses

J.C. Olivares-Galvan[1], I. Hernandez[2] , P.S. Georgilakis[3], and L.E. Campero[1]

[1]Universidad Autónoma Metropolitana, Azcapotzalco, Mexico, D.F.
[2]Centro de Investigacion y de Estudios Avanzados del IPN, Unidad Guadalajara, Guadalajara, Jalisco, Mexico
[3]School of Electrical and Computer Engineering, National Technical University of Athens, Athens, Greece

This paper describes a type of didactic material used when teaching electromagnetism. The purpose is to guide the students to verify the results of a Finite Element (FE) simulation using those obtained analytically. This procedure has shown to be of great help during their learning of the FE method. The example in this paper uses a 2D analytical method to estimate the magnetic field generated by ...

Multiphysics Analysis for the Electromagnetic Vibration Absorber

K. Liu, and Y. He
Department of Mechanical Engineering, Lakehead University, Thunder Bay, ON, Canada

This paper reports a multiphysics analysis for a newly developed electromagnetic vibration absorber (EMVA). The EMVA uses an electromagnet, permanent magnet, and aluminum beam to form a variable spring. By changing the current of the electromagnet, the stiffness of the EMVA can be adjusted instantaneously. Such a device belongs to the family of tunable vibration absorbers. The tunable vibration ...

Design of an Anti-Magnetic Screen for the Neutron Decay Spectrometer aSPECT

G. Konrad1, F. A. Guardia1, S. Baesler1,2, M. Borg1, K. Eberhardt3, F. Gluck4,5, W. Heil1, S. Hiebel1,6, R. M. Horta1, and Y. Sobolev1
1Universität Mainz, Institut fur Physik, Mainz, Germany
2University of Virginia, Department of Physics, Charlottesville, VA, USA
3Universität Mainz, Institut for Kernchemie, Mainz, Germany
4Universität Karlsruhe, Experimentelle Kernphysik, Karlsruhe, Germany
5Research Institute for Nuclear and Particle Physics, Theory Department, Budapest, Hungary
6Sekels GmbH, Ober-Mörlen, Germany

This paper deals with the design of an anti-magnetic screen for a superconducting retardation spectrometer using COMSOL Multiphysics.COMSOL was used to model and optimize the anti-magnetic screen to obtain a design that reduces the exterior magnetic field by a factor of about 10, yet does not affect the internal magnetic field and its homogeneity, and that makes sure that the additional forces ...

Magnetic and Circuital Modeling of a Low Harmonic Pollution Three Phase Transformer

E. Scotoni[1], C. Tozzo[2], D. Zoccarato[1], F. Paganini[1]
[1]TMC Italia, Busto Arsizio, Italy
[2]COMSOL, Brescia, Italy

A three phase transformer with very low harmonic pollution transferred back to power line is here presented. In fact, thanks to the described setup, intermediate harmonics (5th and 7th) are not going out back to the power line feeding the primary. These results has been extensively validated versus measurements performed on produced and shipped machine. With these results, TMC is then featuring ...

Simulation and Analysis of a Borehole Transient Electromagnetic Reservoir Monitoring System

S.M. Dutta[1], A. Reiderman[1]
[1]Baker Hughes, Houston, TX, USA

Waterflooding and steam-flooding are used worldwide for EOR. Recently, CO2-flooding has attracted global attention as a means of EOR as well as for carbon capture and sequestration. These processes cause significant changes over time in the fluid composition of oil reservoirs. This paper demonstrates the feasibility of a borehole transient electromagnetic (TEM) system that can map the fluid ...

Analysis of Multiconductor Quasi-TEM Transmission Lines and Multimode Waveguides

S.M. Musa[1], M.N.O. Sadiku[1], and O.D. Momoh[2]
[1]Prairie View A&M University, Prairie View, TX, USA
[2]Indiana University-Purdue University, Fort Wayne, IN, USA

This paper presents an analysis approach of multicondcutor quasi-TEM lines transmission interconnect in a single dielectric region and multimode waveguides using the finite element method (FEM). FEM is especially suitable and effective for the computation of electromagnetic fields in strongly inhomogeneous media. We illustrate that FEM is suitable and effective as other methods for modeling of ...

Optimization of an Adiabatic Demagnetization Refrigerator’s Superconducting Magnet Shield for the Micro-X High-Resolution Microcalorimeter X-ray Imaging Rocket

E. Figueroa-Feliciano[1], M. Cavolowsky[2], C. Macklin[2], Z. Li[1], A. Sharer[2], and A. Walker[2]
[1] Massachusetts Institute of Technology, Cambridge, MA
[2] Olin College, Needham, MA

We are working on the design of a sounding rocket payload to perform high-resolution imaging spectroscopy of the Puppis A supernova remnant. This rocket payload uses Transition-Edge-Sensor Microcalorimeters, which are superconducting detectors that obtain very high (2 eV FWHM at 6 keV) imaging spectra. These devices need to be cooled to 50 mK, for which we are designing an adiabatic ...

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