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.

Modeling Orbital Angular Momentum (OAM) Transmission in Waveguides with the COMSOL Multiphysics® Software

A. Cagliero [1], R. Gaffoglio [1], A. De Vita [2], B. Sacco [2],
[1] Department of Physics, University of Torino, Torino, Italy
[2] Centre for Research and Technological Innovation, RAI Radiotelevisione Italiana, Torino, Italy

The recent years have witnessed a growing interest in the possibility of enhancing the information transfer per unit bandwidth by exploiting the Orbital Angular Momentum (OAM) of light in both free-space and guided scenarios. In the proposed paper, the propagation of suitable OAM superpositions of waveguide eigenmodes in guiding structures with a circular symmetry is analyzed both theoretically ...

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 ...

Transient Analysis of an EMVD Using COMSOL Multiphysics

G.E. Stebner[1], C. Hartwig[1]
[1]Ostfalia University, IMEC, Wolfenbüttel, Germany

In this paper an EMVD (Electro-Mechanical Valve Drive) for combustion engines is redesigned to achieve a fail-safe behavior when power loss occurs. The AC/DC Module and the Moving Mesh interface of COMSOL Multiphysics 4.2 are used to build up a transient model. This model also includes the calculation of eddy currents.

Trapping DNA Molecules in Fluids Using Electrokinetic Effects Generated by Different Electrode Geometries

S. Ghonge[1], S. Kapur [1], S. Banerjee[1]
[1]Birla Institute of Technology and Science, Pilani - Hyderabad Campus, Hyderabad, Telangana, India

In this paper we present results of simulations done to predict the behavior of a system consisting of DNA molecules in an aqueous medium under the combined effect of AC Electroosmosis and Dielectrophoresis (DEP). ACEO is caused by the movement of fluid particles under the influence of the electric field. DEP is caused by polarization of the DNA particle. Two different electrode geometries ...

Current Density Distribution for a Full Scale Industrial Alluminization Process

A. Giaccherini [1], S. Martinuzzi [2], E. Berretti [1], A. De Luca [3], A. Lavacchi [4], S. Caporali [2], M. Innocenti [3]
[1] Chemistry Department, University of Firenze, Firenze, Italy
[2] Consorzio INSTM, Firenze, Italy
[3] Chemistry Department, University of Firenze, Firenze, Italy
[4] Institute of Chemistry of Organometallic Compounds, CNR, Firenze, Italy

Respect to the previous approaches, in this communication the electrochemical and chemical kinetics as well as the transport phenomena, were modelled at very high level of theory, taking into account all the parameters affecting the galvanic process, including turbulent convection fields. In particular, we considered tertiary current distribution, chemical equilibria and turbulence models, such ...

Dielectric Adaptive Optical Gels

R. Eisenschmid [1],
[1] OPTIMA pharma GmbH, Schwäbisch Hall, Germany

Adaptive Optics is common sense, since many people use digital cameras with electromechanical iris actors on elastic autofocus lenses. This project tries to create a COMSOL Multiphysics based mathematical model of adaptive optics with electrostatically induced deformation of dielectric gels. Upper and lower sides of a lens (dielectric conductive gel) are coated by transparent conductive films, i ...

Modeling, Simulation and Verification of Contactless Power Transfer Systems

J. Serrano [1], C. Carretero [1], J. Acero [1], I. Lope [1]
[1] University of Zaragoza, Zaragoza, Spain

This work presents the analysis of a wireless power transfer system consisting of two coupled coils and ferrite slabs acting as flux concentrators. The study makes use of Finite Element Method (FEM) simulations to predict the key performance indicators of the system such as coupling, quality factor and winding resistance. The simulations results were compared against experimental measurements on ...

Track Visualisation of Charged Particles in a Dipole Magnetic Field

B. Polychronopulos
Smiths Detection (Watford) Ltd, Watford, UK

This paper presents results on the visualisation of tracks of charged particles in a non-uniform magnetic field. The field modelled is that generated by a coil driven by DC current. The motion of typical particles, such as electrons, ions and multiply-charged heavy particles has been simulated.  The motion is initially assumed to be in vacuum, so that collisions with neutral particles can ...

Dynamic Simulation of Electromagnets

Harald Biller
Continental Automotive Systems, Frankfurt, Germany

Harald Biller studied mathematics and physics at Darmstadt, London, and Würzburg. In 1999, he received his PhD from Stuttgart University, specializing in functional analysis, topology, and Lie theory. He worked as a lecturer at Darmstadt University until 2004, when he became a development engineer with the automotive supplier Continental, one of the leading producers of electronic brake and ...

Model of an Interdigitated Electrodes System for Cell Counting Based on Impedance Spectroscopy

E. Bianchi[1][2], F. Bellati[1], E. Rollo[2], G. Dubini[1], C. Guiducci[2]
[1]Politecnico di Milano, LaBS, Laboratory of Biological Structure Mechanics, Milano, Italy
[2]Swiss Federal Institute of Technology (EPFL), Laboratory of Life Sciences Electronics - Swiss Up Chair, Lausanne, Switzerland

A model of a cell counter sensor based on Impedance Spectroscopy (IS) has been implemented in COMSOL Multiphysics. The cell counter is a silicon-based microdevice consisting in 3D electrodes placed in a wide microchannel: cells flow in the microchannel through the electrodes to be detected. The model allows to evaluate the functionality of the device depending on geometrical parameters and ...