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.

Blistering of Industrial Floor on Concrete Substrate: the Role of the Air Overpressure

S.V. Aher[2], P. Devillers[1], G. Fau[3], B. Tranain[3], and C. Buisson[1]
[1]Centre des Matériaux de Grande Diffusion, Ecole des Mines d’Alès, Alès cedex, France
[2]Indian Institute of Technology Kanpur, Kalyanpur, Kanpur, Uttar Pradesh, India
[3]Centre Scientifique et Technique du Bâtiment, France

Surface coating can fullfil their function satisfactorily over an extended period of time only if there is a good bond between the concrete substrate and the coating. The most numerous cases of blistering affect the airtight covers of the concrete subjected to negative pressures of humidity from the support. The general objective of this study is the understanding of the blistering phenomenon. ...

Rheological Behaviour of Biphasic Material

P. Lamy-Bracq[1], J. Leroy[2], and C. Coulouarn[1]
[1]NEXTER Munitions, Bourges, France
[2]ENSI Bourges, Bourges, France

The rheological behaviour of a biphasic material is quite difficult to model because of the difficulties to represent the evolution of the space position of each solid particle in the solid matrix. The first part of this study consider an equivalent material by homogeneisation method. The main point of this first part was the representation of the rotation of the rheological mobile. The second ...

Simplifying A Model Of Short Subsequent Sections Containing A Common Detailed Cross-Section

J. Krah
AkerSolutions, Fornebu, Norway

In COMSOL Multiphysics it is possible to implement and simulate several independent models in parallel. This can be meaningful when the different models are coupled to each other by some kind of interaction. If a part of the geometries is identical in all models, this part can be reduced in that it is implemented in only one of the geometries. In the other geometries only its solution towards its ...

Simulation of the Mechanical Stability of Inkjet-Printed Hierarchical Microsieves

S.F. Jahn[1,3], S. Ebert[2], M. Hackert[1], W.A. Goedel[2], R.R. Baumann[3], and A. Schubert[1,4]
[1]Chemnitz University of Technology, Chair Micromanufacturing Technology, Germany
[2]Chemnitz University of Technology, Physical Chemistry, Germany
[3]Chemnitz University of Technology, Professorship for Digital Printing and Imaging, Germany
[4]Fraunhofer Institute for Machine Tools and Forming Technology, Chemnitz, Germany

Porous membranes with pore sizes in the micrometer scale are required in many micro systems dedicated to biological and chemical applications. If their thickness is in the same dimension like the pore diameter they are called microsieves. On the one hand, a thin membrane guarantees a small flow resistance but on the other hand the mechanical strength is reduced. We developed a process which ...

Analysis Of The Design Criteria For Ancient Greek And Roman Catapults

K.M. Paasch
Center for Product Development, Mads Clausen Institute, South Danish University, Denmark

This paper will give a short overview of use of COMSOL Multiphysics for analyzing ancient Greek and Roman catapults with the main focus on the energy storing torsion springs. Catapults have been known and used in the Greek and Roman world from around 399 BC and a fully standardized design for powerful torsion catapults emerged around 270 BC, based on one basic factor, the diameter of the torsion ...

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