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.

Calculation of Cable Parameters for Different Cable Shapes 

H. Lorenzen[1], J. Timmerberg[1], and S. Mylvaganam[2]
[1]Department of Electrical Engineering, UAS OOW, Wilhelmshaven, Germany
[2]Department Technology/Engineering, Telemark University College, Porsgrunn, Norway

Efforts involving simulation of  transmission line networks necessitate the accurate values of the parameters of the lines. In this paper, as an attempt in estimating such parameters, the parameters of high voltage asymmetric power lines are calculated. In the process of estimation, the three phase equivalent circuit model is used. The resistance and inductance of such lines are dependent on ...

Numerical Calculation of the Dynamic Behavior of Asynchronous Motors with COMSOL Multiphysics

J. Güdelhöfer[1], R. Gottkehaskamp[1], A. Hartmann[1]
[1]Department of Electrical Machines and Electromagnetic Field Theory, University of Applied Sciences Düsseldorf, Düsseldorf, Germany

This paper shows how a time-dependent and non-linear simulation of the dynamic operation behavior of an induction machine is executed by means of the \"Rotating Machinery\" interface from COMSOL Multiphysics 4.2a. The two-dimensional FEM model is connected to electrical circuits by coupling the physics \"Rotating Machinery\" and \"Electrical Circuit\" interfaces. These circuits include the lumped ...

Finite Element Analysis of Superconductive Tape by Using T-Ω Formulation

H. Arab[1], S. Memiaghe[1], C. Akyel[1]
[1]Ecole Polytechnique of Montreal, Montreal, QC, Canada

This paper deals with a numerical modelling technique based on finite elements method for computing magnetic field and current density distributions in high temperature Superconducting (HTS) tapes. The model is developed using the T-ῼ formulation for which the degree of freedom (DOF) and the CPU time decreased considerably in AC losses analysis, and it is also observe that T-ῼ formulation ...

Investigation on an Encircling Pulsed Eddy Current Probe Performance Using COMSOL Multiphysics®

S. Majidnia[1], R. Nilavalan[1], J. Rudlin[2]
[1]Brunel University, London, United Kingdom
[2]TWI ltd, Cambridge, United Kingdom

Conventional eddy current techniques have been used to a great extent for detection of surface breaking defects in conductive materials. However, detection of sub-surface defects is limited due to the single frequency and skin effect phenomena. Pulsed Eddy Current (PEC) techniques overcome these limitations. This work involves modelling of an encircling coil around a steel pipe with and without ...

Power transmission lines generated electric and magnetic fields calculations

EL-Fouly, T.H.M.1, EL-Saadany, E.F.1, Salama, M.M.A.1, Abdel-Galil, T.K.2, Habiballah, I.O.2
1 Electrical and Computer Engineering Dept., University of Waterloo, Waterloo, Ontario, Canada
2 King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia

This paper invetigates using the FEMLAB software modules in calculating the electromagnetic fields generated in the vicinity of High Voltage (HV) power transmission lines. The analysis presented in this paper is divided into two main parts. The first part investigate the effectivness of using the electrostatic and magnetotstatic modules of the FEMLAB software in claculating the generated ...

Experimental Observation and Numerical Prediction of Induction Heating in a Graphite Test Article

T.A. Jankowski[1], D.P. Johnson[1], J.D. Jurney[1], J.E. Freer[1], L.M. Dougherty[1], and S.A. Stout[1]

[1]Los Alamos National Laboratory, Los Alamos, New Mexico, USA

The induction heating coils used in the plutonium casting furnaces at the Los Alamos National Laboratory are studied here. A cylindrical graphite test article has been built, instrumented with thermocouples, and heated in the induction coil that is normally used to preheat the molds during casting operations. The experiments have been modeled in COMSOL Multiphysics and the numerical and ...

Virtual Prototyping of the C-DACS Implantable Hearing Device

P. Kennes, B. Onkelinx, and C. Van Himbeeck
Cochlear Technology Centre Europe, Mechelen, Belgium

The key component in Direct Acoustical Cochlear Stimulation (C-DACS) therapy is an implantable micro-actuator that generates vibrations that are directly coupled to the oval window of the inner ear. The actuator comprises a balanced armature whose magnetic field is modulated by the coil current. A virtual prototyping environment is set-up to support the actuator design optimization in terms of ...

Using COMSOL Multiphysics for the Modelling of a Hybrid Linear Stepper Motor

R. Wislati, and H. Haase
Institut für Grundlagen der Elektrotechnik und Messtechnik, Leibniz Universität Hannover, Hannover, Germany

In this paper a 2-phase hybrid linear stepper motor (HLSM), also known as Sawyer linear motor, has been considered as a potential approach in Variable Valve Actuation (VVA) Systems for Internal Combustion Engines.Initially, the reluctance network approach (RNA) with lumped parameters has been used assuming an infinite permeability of the steel core. The results have then been compared with a ...

Finite Element Analysis of Multiconductor Interconnects in Multilayered Dielectric Media

S. Musa and M. Sadiku
College of Engineering, Prairie View A&M University, Prairie View, TX, USA

Due to the complexity of electromagnetic modeling, researchers and scientists always look for development of accurate and fast methods to extract the parameters of electronic interconnects and package structures. In this paper, we illustrate modeling of multiconductor interconnects in multilayered dielectric media using COMSOL Multiphysics and the finite element method. We specifically determine ...

Modeling Ion Motion in a Miniaturized Ion Mobility Spectrometer

S. Barth, and S. Zimmermann
Drägerwerk AG & Co. KGaA, Lübeck, Germany

Ion mobility spectrometry provides fast detection of very low concentrations of chemical substances. Simple instrumentation combined with high sensitivity and high selectivity are the advantages of this technique. One well established field of application is the detection of hazardous compounds in air, such as chemical warfare agents, explosives and pollutants. A numerical model based on finite ...

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