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 Multiphysics Modeling for Design Optimization of Eddy Current Crack Detectors

E. Weststrate, M. Steinback, N. Rensing, and T. Tiernan
Radiation Monitoring Devices Inc., Watertown, MA, USA

Passing alternating current through a wire placed just above a conducting surface induces eddy currents in that surface. Any cracks present in the conductor modify the eddy current distribution, creating a magnetic field signature unique to the crack. This magnetic signature can be detected by placing magnetic field sensors such as magnetoresistive sensors or inductive loop pickups in close ...

Gauss's Law; Teaching Platform Using the Magic Cube: Implementation by COMSOL Multiphysics

H. Ghali, and A. Hossam
Electrical Engineering Department, British University in Egypt, Cairo, Egypt

Most probably Gauss\'s law is considered as the first \"electromagnetic\" concept for early undergraduate physics and electromagnetic courses. In early study year, teaching Gauss’s law is usually performed based on two main components; 1) The use of simple symmetrical charge distributions where a correct expectation of the spatial behavior of the electric flux density is possible and 2) The use ...

Calibration of MHD Flow Meter using COMSOL Multiphysics

S. Sahu[1], R. P .Bhattachryay[1], E. R. Kumar[1]
[1]Institute for Plasma Research, Bhat, Gandhinagar, Gujarat, India.

There is limited option for non-intrusive flow measurement of liquid metals at high temperature. Liquid metal flowing in a conduit along with the transverse magnetic field induces emf in the liquid metal. The emf developed; which has linear dependency on flow velocity; can be used for flow velocity estimation. In case of conducting conduit the emf can be measured at the conduit wall. The main ...

Quasi-static Analysis of Shielded Microstrip Lines

S.M. Musa, and M.N.O. Sadiku
Prairie View A&M University, Texas

Microstrip lines are the most commonly used transmission lines at high frequencies. In this paper, we will illustrate how to model the capacitance of microstrip lines using COMSOL Multiphysics. The goal is to determine the capacitance per unit length of shielded microstrip lines.

Magnetic Liquids for Lab-on-a-chip and Rapid Diagnostics Applications

H. Köser
Yale University

In this presentation we outline our recent work on Magnetic Liquids, and the great number of application areas these are used. Ferrofluids are nanometer sized magnetic particles, covered by a surfactant, suspended in a carrier medium compatible with the surfactant material. Ferrofluids are applicable to a great and ever increasing number of application areas, such as: • Liquid Seals and ...

Numerical Simulation versus Experiments and Analytical Computation for Design Optimization

Mario Jungwirth
Upper Austria University of Applied Sciences
Wels, Austria

This presentation deals with how COMSOL Multiphysics can be used in education. The presentation is performed by demonstrating various multiphysics examples, their setup, modeling approach, and solution. ------------------------------------------- Keynote speaker's biography: Dr. Mario Jungwirth has been a professor at the Upper Austria University of Applied Sciences since 2003. In 2001, he ...

Understanding Ferrofluid Spin-Up Flows in Rotating Uniform Magnetic Fields

S. Khushrushahi, and M. Zahn
Massachusetts Institute of Technology, Cambridge, MA, USA

A fully filled sphere of ferrofluid has constant demagnetizing factors in all three Cartesian directions such that when subjected to a uniform external rotating magnetic field the internal field is also uniform, and ultrasound measurements give no observable flow. Non-uniform magnetic fields or a non-uniform distribution of susceptibility are necessary conditions for ferrofluid spin-up flows in ...

Modeling Of A Single Pulse Electric Discharge At Sphere/Flat Interface By Coupling Contact Multiphysics And Phase Transformations

G. Maizza, P. Di Napoli, and R. Cagliero
Dipartimento di Scienza dei Materiali ed Ingegneria Chimica, Politecnico di Torino, Torino, Italy

Contact electro-thermal phenomena are of great theoretical and technological interest to a large number of processing applications, such as spot welding, current-assisted sintering, electrical circuitry (switches) and motors. A model has been developed, aiming at predicting physical and metallurgical phenomena in a steel sample upon rapid heating induced by current pulse discharge. Electric pulse ...

Magnetotelluric Response Distortion Over Rugged Topography

D. Rizzello[1], P. Canepa[1], E. Armadillo[1]
[1]DISTAV - University of Genova, Genova, Italy

Topographic effects on magnetotelluric responses may be severe on rugged terrains. Finite elements simulation is a valuable tool to quantify this effect, due to its capability to match real morphologies. To do the estimate of the distortion, the AC/DC Module of COMSOL has been employed, using a model of homogeneous resistivity on which a DEM (Digital Elevation Model) profile of the Deep Freeze ...

Finite Element Modeling of Transient Eddy Currents in Multilayer Aluminum Structures

V. Babbar[1], and T. Krause[1]

[1]Department of Physics, Royal Military College of Canada, Kingston, Ontario, Canada

Transient eddy current (TEC) technique is being developed for detection of flaws located at depth within multilayer aluminum structures. The present work involves finite element modeling using COMSOL Multiphysics software to simulate different types of probes by changing some of these parameters in an attempt to generate an output signal of optimum magnitude and shape. Some of the model results ...

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