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.

Calculus of the Elastic Properties of a Beam Cross Section

A. Genoese[1], A. Genoese[1], and G. Garcea[1]
[1]Dipartimento di Modellistica per l'Ingegneria, Università della Calabria, Arcavacata di Rende, CS, Italy

Saint-Venant general rod theory is used to calculate the elastic factors of a section through the numerical solution of a system of partial differential equations. The elastic properties so evaluated are used in a geometric nonlinear analysis of 3D beam structures with general cross-section to calculate some important quantities such as the stiffness matrix. Linear solutions, such as the Saint ...

3-D COMSOL Analysis of Extruder Dies

E. Solomon[1] and V. Mathew[1]
[1]Arcada University of Applied Sciences, Espoo, Finland

Three-dimensional flow analysis was performed by using COMSOL Multiphysics Chemical Engineering Module for the purpose of analyzing the flow properties and finding out the operating points of a test domain. Using material property table for an exemplary melt of LDPE (Low-Density Polyethylene), the logarithmic viscosity-shear rate graph was plotted and fitted to the 4–constant modified Carreau ...

Measuring and Calculation of Positive Corona Currents Using COMSOL Multiphysics®

M. Quast[1] and N.R. Lalic[1]
[1]Gunytronic GmbH, St Valentin, Germany

The sensor type developed by Gunytronic uses corona discharge for measuring flow rates in exhaust streams of automotives, aircrafts and industrial plants. This paper will present the development of testing equipment used in laboratory for investigating physical relations on corona currents, charged particle transport, the calculation of the collateral electric fields and high potentials. This ...

Numerical Modelling of a Free-Burning Arc in Argon. A Tool for Understanding the Optical Mirage Effect in a TIG Welding Device

J-M. Bauchire[1], E. Langlois-Bertrand[1], and C. de Izarra[1]
[1]GREMI, CNRS, Université d’Orléans, Orléans, France

In this paper, we present the numerical modelling of a free-burning arc and its application to the understanding of optical mirage effect which could occur in a TIG (Tungsten Inert Gas) device used in welding applications.

Simulation of Daisy Chain Flip-Chip Interconnections

G.S. Durante[1] and M. Fretz[1]

[1]CSEM Zentralschweiz, Alpnach Dorf, Switzerland

Flip-chip interconnection technologies have been tested through the use of a test chip with embedded single-bump daisy chains. The Flip-Chip technologies are selected among Au bump Thermocompression (TC) with and without Nonconductive Adhesives (NCA) underfiller, anisotropic conductive adhesive (ACA) bonding, and AuSn20 eutectic solder. The single bumps were then measured with a high precision ...

Large Scale Outdoor Flammable & Toxic Gas Dispersion Modelling in Industrial Environments

A. Hallgarth[1], A. Zayer[1], A. Gatward[2], and J. Davies[2]

[1]Hazard Research & Risk Consultants Ltd, Aberystwyth, Wales, United Kingdom
[2]Independent Consultants, United Kingdom

HazRes has developed a gas discharge and dispersion model in COMSOL which takes into account the effects of localized wind profiles and turbulence generated by buildings, structures and terrain on the dispersion of gases in question. The main focus of this work is to develop and provide clients with more accurate prediction methods relative to industrial standard software tools in modeling ...

Accuracy of Fully Coupled Loudspeaker Simulation Using COMSOL

M. Hedges[1][2] and Y.W. Lam[1]
[1]Acoustics Research Centre, School of Computing, Science & Engineering, University of Salford, Salford, United Kingdom
[2]Monitor Audio Ltd., Rayleigh, Essex, United Kingdom

Loudspeaker simulation is used to inform the designer as to the performance of a design. In recent years the Finite Element Method (FEM) has been used to model the mechanical and acoustical attributes of a loudspeaker with varying success. This paper shows how a model that incorporates the magnetic, electromagnetic, mechanical and acoustical domains performs. These domains will be coupled where ...

Multi-Objective Optimization of a Ball Grid Array Using modeFRONTIER® and COMSOL Multiphysics®

H. Strandberg[1], T. Makkonen[2], and J. Leinvuo[2]
[1]ESTECO Nordic AB, Lund, Sweden
[2]VTI Technologies Oy, Vantaa, Finland

Capacitive MEMS (Micro-Electro-Mechanical Systems) accelerometers may be directly soldered to the printed circuit board by an array of solder balls. Differences in the thermal expansion coefficients of the pertinent materials cause deformations of the accelerometer under temperature change. This may cause a relative movement of the sensing masses with respect to the sensing electrodes, resulting ...

A Magnetohydrodynamic Study of a Inductive MHD Generator

A. Montisci[1] and R. Pintus[1]

[1]Department of Electrical and Electronic Engineering, University of Cagliari, Cagliari, Italy

The aim of the proposed device is to overcome the typical drawbacks of MHD generators, such as the needed of a very high external magnetic field, the strong dependency of the efficiency by the temperature of the fluid, and the deterioration of the electrodes that are in contact with the high temperature plasma. In fact the proposed device does not need an external magnetic fluid to work, but it ...

Calculating Power Loss of Contactless Power Transmission Systems with Ferrite Components

S. Hanf[1] and D. Kürschner[1]
[1]Institut für Automation und Kommunikation Magdeburg, Magdeburg, Germany

In this paper a methodology for calculating loss within contactless inductive power transmission systems, resulting from hysteresis and eddy current effects, is presented. The usage of the mathematical models of Stoll and Steinmetz for the determination of core loss with COMSOL is explained. Apart from the metrological verification of selected aspects of power loss, the results of a parametrical ...