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.

Transient Electromagnetic-Thermal FE-Model of a SPICE-Coupled Transformer Including Eddy Currents with COMSOL Multiphysics 4.2

H. Neubert[1], R. Disselnkötter[2], and T. Bödrich[1]
[1]Technische Universität Dresden, Institute of Electromechanical and Electronic Design, Dresden, Germany
[2]ABB AG, Forschungszentrum Deutschland, Ladenburg, Germany

Current transformers are used to measure currents in power grid systems. They are characterized by strong interactions between external electrical sources and loads respectively and the magnetic subsystem. Self-heating due to losses has to be considered because of the temperature-dependent material behaviour. The paper presents a transient 3D FEA transformer model which includes a H(|B|) ...

Comparison Between Honeycomb and Fin Heat Exchangers

P. Gateau[1], P. Namy[2], and N. Huc[3]
[1]SAS SYNGAS, rue du camp d’aviation, 44320, Saint Viaud, France,
[2]SIMTEC, 8 rue Duploye, 38100, Grenoble,
[3]COMSOL FRANCE, WTC, 38000, Grenoble,

Metal honeycombs are used as catalyst supports. They can be considered as complex fins for heat exchange. A simple heat transfer model was compared with 2D simulations using COMSOL Multiphysics. There was a good correlation when the fluid temperature was the same in all cells. However, significant discrepancy apperared when compared with a 3D simulation with laminar flow. Honeycomb cells ...

Fluid-Structure Interaction Modeling for an Optimized Design of a Piezoelectric Energy Harvesting MEMS Generator

I. Kuehne[1], A. van der Linden[2], J. Seidel[1], M. Schreiter[1], L. Fromme[2], and A. Frey[1]
[1]Siemens AG, Corporate Research & Technologies, Munich, Germany
[2]Comsol Multiphysics GmbH, Göttingen, Germany

This paper reports the design of a piezoelectric energy harvesting micro generator for an energy autonomous tire pressure monitoring wireless sensor node. For our design we use a piezoelectric MEMS generator approach without additional mass. The intrinsic mass of the cantilever is in the microgram region and the resulting acceleration forces are very small. The generator has a triangular ...

On the Simulation of the Lightning Strikes to Complex Grounded Structures

M. Becerra
Royal Institute of Technology
School of Engineering
Electromagnetic Engineering Lab
Stockholm, Sweden

There is a considerable world-wide interest among lightning protection engineers and designers on the improvement of the standard procedures to assess the location of the most vulnerable places on complex structures to be struck by lightning flashes. This paper presents the implementation of the Self-consistent Lightning Interception Model in Matlab by using the COMSOL Multiphysics 3.5 ...

Investigations on Hydrodynamic in Stirred Vessels for Educational Purposes

A. Egedy, T. Varga, and T. Chován
University of Pannonia
Department of Process Engineering
Veszprém, Hungary

With detailed hydrodynamic modelling of a system the critical parameters and operation limits can be determined. In the field of fluid dynamic and reactor engineering one of the most important aspects is the practical knowledge of future engineers and technicians. In our research several different reactor constructions and impeller configurations were modelled to achieve a better ...

Simulation of Passive Magnetic Bearing Using COMSOL Multiphysics

K. Falkowski
Military University of Technology
Warsaw, Poland

The article presents the process of verification of the passive magnetic bearing by the Comsol Multiphysic program. There is shown construction of the radial passive magnetic bearing PMB60x85x20-5, which was designed in the Military University of Technology. The distribution of the magnetic flux density and the static characteristic of the bearing were estimated by the Comsol Multiphysic. The ...

Benchmark of COMSOL vs. ROXIE Codes for the Calculation of a Particle Accelerator Quadrupole

I. Rodriguez, and J. L. Munoz
ESS Bilbao
Bilbao, Spain

The field quality requirements of most particle accelerator magnets are very tight and, therefore, very precise simulations are needed to accurately calculate these devices. CERN\'s ROXIE code is widely used as a reference software to calculate normal conducting and superconducting magnets for particle accelerator applications. ROXIE uses the full vector potential coupled to the BEM-FEM ...

Mathematics-based Optimization in the COMSOL Multiphyscis Framework

T. Slawig[1], and U. Prüfert[2]
[1]Christian-Albrechts-Universität Kiel, Kiel, Germany
[2]TU Bergakademie Freiberg, Freiberg, Germany

Use of COMSOL Multiphysics equation-based model capability to solve optimization and control problems. Solution of time-dependent problems with space-time finite elements. Solution of constraint optimization problems. Mathematical back-up for equation-based optimization.

Heat and Mass Transfer in a Gypsum Board Subjected to Fire

B. Weber
Swiss Federal Laboratories for Materials Science and Technology
Duebendorf, Switzerland

Heat and mass transfer through a gypsum board exposed to fire is simulated and compared to experimental data. The gypsum board is modeled as a porous medium with moist air in the pores. A dehydration front develops at the fire side and travels through the board, consuming energy and releasing water vapor. The vapor migrates through the porous medium by convection and diffusion, and condenses in ...

Compression Driver Simulation Including Air Damping in Phase Plug

R.Christensen, and U. Skov
iCapture ApS
Gadstrup, Denmark

A compression driver is a certain type of electrodynamic loudspeaker which has a phase plug with slits in front of the diaphragm. The slits are narrow enough that the so-called viscothermal effects are of significant importance. In this paper a 2D axisymmetric finite element model of a commercial compression driver is established where the vibroacoustic behavior can be evaluated. The ...