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.

Solving Distributed Optimal Control Problems for the Unsteady Burgers Equation in COMSOL Multiphysics®

F. Yilmaz[1] and B. Karasözen[2]

[1]Department of Mathematics, Gazi University, Ankara, Turkey
[2]Department of Mathematics and Institute of Applied Mathematics, Middle East Technical University, Ankara, Turkey

We use COMSOL Multiphysics® for solving distributed optimal control of un- steady Burgers equation without constraints and with pointwise control constraints. Using the first order optimality conditions, we apply projection and semi-smooth Newton methods for solving the optimality system. We have applied the standard approach by integrating the state equation forward in time and the ad- joint ...

A Computational Investigation of Flow - Mechanical Energy Loss: Relevance to the Total Cavopulmonary Connection

Wiesman, J.P.1, Hamlington, K.L.1, Gaver, D.P.1, Ross-Ascuitto, N.T.2, Ascuitto, R.J.2
1 Tulane University, Department of Biomedical Engineering
2 Tulane University, Department of Pediatrics and Physics

The “Total Cavopulmonary Connection (TCPC)”, or Fontan operation, has become the surgical treatment of choice for children with functional single-ventricle heart disease. We assessed fluid energetics relevant to TCPCs using the computational fluid-dynamics package FEMLAB 3.1 (COMSOL, Inc., Burlington, MA) to describe non-pulsatile flow through a conduit, taken to represent an obstructed ...

FEMLAB Modeling of Multiple Crack Systems

Grechka, V.1, Kachanov, M.2
1 Shell E & P, Houston, TX
2 Department of Mechanical Engineering, Tufts University, Medford, MA

Almost ubiquitous presence of fractures in the earth and their tendency to provide natural pathways for flow of hydrocarbons makes them an important target in exploration for oil and gas. While typical geophysical (mainly seismic) data indicate only relatively large faults, information about many small fractures of exploration interest has to be inferred from seismics by applying some effective ...

A Mass-consistent Atmospheric Model using FEMLAB Optimization

Wang, X., Pepper, D.W.
University of Nevada, Las Vegas, Department of Mechanical Engineering, Las Vegas, NV

The assurance of mass consistency in constructing 3-D atmospheric velocity fields is important when developing accurate numerical simulations. The implementation of a mass consistent wind field is typically undertaken using available meteorological data obtained from instrumented towers and remote sensors. In this study, two methods are presented and compared for constructing 3-D mass ...

Implementation of FEMLAB in S-Functions

van Schijndel, A.W.M.J.
Technische Universiteit Eindhoven, Netherlands

FEMLAB has standard facilities to export models to Simulink. Normally, the standard export works well if the solvers, available in Simulink, can handle the problem. However, if a model in FEMLAB needs special solvers, for example airflow or other non-linear problems, the standard export to Simulink is often not suitable, because the standard solvers of Simulink cannot handle such a problem ...

Modelling of Heat Transfers on a Steel Plate. First Approach in Presence of Intumescent Coating

Jimenez, M., Duquesne, S., Bourbigot, S.
Laboratoire des Procédés d’Elaboration de Revêtements Fonctionnels (UPRES EA 1040), Ecole Nationale Supérieure de Chimie de Lille, Villeneuve d’Ascq Cedex, France

The aim of this work is to optimize the efficiency of an intumescent coating that is designed to protect steel in a hydrocarbon fire. This kind of coating, applied on steel plate, is usually evaluated in big industrial furnaces and exposed to hydrocarbon fire conditions. FEMLAB has been first used to model heat transfers in the virgin steel plate: a three dimensional model has been created using ...

Einsatz von FEMLAB bei der Optimierung der Geometrie eines Hochspannungsimpulstransformators

Cernat, R.1, Brinkmann, C.1, Weißgerber, T.2
1 Universität Dortmund, Lehrstuhl für Hochspannungstechnik und EMV
2 era GmbH, Dortmund

Hochspannungsimpulstransformatoren werden bei Ottomotoren zur Entzündung des Kraftstoff- Luft-Gemischs eingesetzt. Aktuelle Fahrzeuge sind mit zylinderselektiver Zündung ausgerüstet, so dass für jeden Zylinder ein Zündtransformator benötigt wird. Dieser ist direkt über der Zündkerze positioniert und stellt die benötigte Hochspannung sowie eine ausreichende Funkenenergie zur Verfügung, ...

Simulation der elektrischen Feldverteilungen im elektrischen Rasterkraftmikroskop

Müller, F, Hietschold, M - Institut für Physik Analytik an Festkörperoberflächen (AFKO)

Einsatz von FEMLAB in der Elektrotechnikausbildung

Timmerberg, J.
Fachhochschule Ostfriesland/Oldenburg/Wilhelmshaven, FB Wirtschaftsingenieurwesen, Wilhelmshaven

Unter Elektrotechnikausbildung ist in diesem Papier die Hochschulausbildung und insbeson-dere die in den Fächern Allgemeine Elektrotechnik und Theoretische Elektrotechnik zu ver-stehen. Üblicherweise wird das Gebäude der Elektrotechnik auf den Erfahrungssätzen des Strömungs-, elektrostatischen und magnetischen Feldes aufgebaut. Zur Motivation und Fes-tigung des Wissens werden dann in den ...

Elastoplastic Models of the Interaction between Active Fronts of the Southern Alps and Dinarides (NE Italy and NW Slovenia)

M. Coccia[1], E. Carminati[1], F. Rolandone[2], M. Battaglia[1], D. Zuliani[3], and P. Fabris[3]
[1]Università La Sapienza, Roma, Italy
[2]Université Pierre et Marie Curie, Paris, France
[3]Centro Ricerche Sismologiche, Udine, Italy

We use GPS measurements and Finite Element analysis to investigate strain accumulation in the interaction between active fronts of the Southern Alps and Dinarides at the northern edge of the Adriatic micro-plate. We develop a three dimensional model of the area taking into account the regional topography, approximating the crust as an elasto-plastic medium and reproducing as close as possible the ...

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