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.

Performance Modelling of Gas Thrust Bearing

N. C. Murmu[1], and D. K. Bhakta[1]
[1] Tribology Division, Central Mechanical Engineering Research Institute, M. G. Avenue, Durgapur, West Bengal, India

Gas lubricated bearing has been developed for high accuracy in precision machines and equipments. Gas lubricated bearings are mainly two types: aerostatic bearings, which require a feed of pressurized gas for their operation, and aerodynamic bearings, which generate their own internal pressure differentials. The latter generate this pressure by the action of simultaneously shearing and squeezing ...

Modeling of High-Temperature Ceramic Membranes for Oxygen Separation

J.M. Gozálvez-Zafrilla[1], J.M. Serra[2], and A. Santafé-Moros[1]

[1]Chemical and Nuclear Engineering Depart., Universidad Politécnica de Valencia, Valencia, Spain
[2]Instituto de Tecnología Química, Valencia, Spain

Oxygen transfer through ceramic membranes at high-temperature can substantially reduce costs respect to conventional separation methods. With the aim to improve the determination of the properties of the ceramic materials, a lab-scale permeation set-up was modeled using the Chemical Engineering Module of COMSOL Multiphysics®. The solution required the coupling of three domains. Gas flow was ...

Modeling Mechanical Deformation and Optical Waveguiding Properties of Ion-Implanted Diamond

F. Bosia[1], P. Olivero[2], and E. Vittone[2]
[1]Dipartimento di Fisica Teorica, Università di Torino, Torino, Italy
[2]Dipartimento di Fisica Sperimentale, Università di Torino, Torino, Italy

Ion implantation in insulating materials leads to local variations in mechanical and optical properties that can be exploited for the fabrication of micro-structures. In particular, ion irradiation of diamond causes the formation of buried amorphised layers, with correspondent mass density and refractive index variations that depend on the level of “damage” of the crystal structure. ...

Effiziente Lösung eines Fluid-Struktur-Interaktions-problems in Hydraulischen Dämpfern mit Elastischen Komponenten

Schreiner, M. - Hochschule für Technik Buchs NTB, Labor für Technomathematik, Buchs

A Multiscale Numerical Model of a Deformable Isothermal Nonwetting Liquid Drop

Smith, M.K., Neitzel, G.P.
The George W. Woodruff School of Mechanical Engineering, Georgia Institue of Technology, Atlanta, GA

A state of permanent, isothermal nonwetting of a solid surface by a normally wetting liquid may be achieved by having the surface move tangentially to a liquid drop that is pressed against it. Surrounding gas is swept into the space between the liquid and solid creating a lubricating film that prevents wetting. The length scales of the drop and the film are typically three or more orders of ...

Virtual Homogeneous Isotropic and Real Unhomogeneous Anisotropic Metamaterials

Akalin, T.
IEMN (Institut d’Electronique de Microélectronique et de Nanotechnologie), CNRS UMR 8520, Dpt DHS, USTL (Université des Sciences et Technologies de Lille)

Characteristics on metamaterials and potential applications are presented with the FEMLAB® software simulations results. By definition, metamaterials are materials which exhibit properties which do not exist naturally. Another point is that metamaterials are associated with the negative refractive index property. In the first part, negative refraction will be defined and illustrated by ...

Skeletal Reduction of Boundary Value Problems over Thin Solids

Suresh, K.
University of Wisconsin – Madison

Boundary value problems posed over thin solids are amenable to a dimensional reduction in that one or more spatial variables may be eliminated from the governing equation, resulting in significant computational gains with minimal loss in accuracy. Extant dimensional reduction techniques unfortunately rely on representing the solid as a hypothetical mid-surface plus a possibly varying thickness. ...

Thermo-mechanical Behavior of Multilayers

Bilotsky, Y., Gasik, M.
Laboratory of Materials Processing and Powder Metallurgy, HUT, Finland

The model for study of thermal mechanical behavior of multilayer thin films was developed. The stress-strain analysis was carried out in combination with thermal effects. The 2D thinfilm model has been solved by FEMLAB 3.1i. The middle layer was thermally loaded with Ohmic heating and other layer’s thicknesses were varied in time. All material data like elastic coefficients, thermal ...

Electromagnetic simulations of Goubau transmission lines with FEMLAB

Akalin, T.
IEMN, Institut d’Electronique, de Microélectronique et de Nanotechnologie, UMR CNRS 8520, USTL Université des Sciences et Technologies de Lille, Villeneuve d’Ascq, France

The BioMEMS (Bio-Electro-Mechanical Systems) have become of considerable interest because they constitute a converging solution for many pluridisciplinary studies. The different covered fields are the biology (single cell, proteins, enzymes, neurons…), the chemistry (polymers), microelectronics and the microtechnologies associated with. Devices whose aim is the study of biological entities are ...

Evaluation of electric impedance spectra for single bio-cells in microfluidic devices using combined FEMLAB/ELDO modeling

Senez, V., Arscott, S.
CNRS/IEMN

This paper describes a simple method to predict the electrical impedance spectrum of single and cultured cells in micro-devices. It can be used for the rapid design of micro-sensors as well as for more fundamental studies about the interactions of electric fields with bio-cells. The finite element (FEMLAB) and the transport lattice (ELDO) methods are coupled through the MATLAB environment for ...

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