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.

Modeling and Simulation of High Sensitivity CMOS Pressure Sensor Using Free Boundary Circular Diaphragm Embedded on Ring Channel Shaped MOSFET - new

S. Joy[1], T. Tom[1]
[1]Rajagiri School of Engineering and Technology, Kochi, Kerala, India

Sensors have diverse applications ranging from the medical field to space exploration. They convert physical parameters such as temperature, pressure, humidity etc. into an electrical output. The discovery of piezoresistivity property of silicon and germanium led to miniaturization of pressure sensors. Improvement in the sensitivity is the major factor to be considered while designing pressure ...

Modeling of Temperature Fluctuations in Frozen Fish

S. Kumar[1], and S. Panigrahi[1]
[1] Agricultural and Food Engineering Department, Indian Institute of Technology Kharagpur, West Bengal, India

 The novel concept of distributing the food super chilled (partially frozen) in order to prolong the shelf life has been suggested in the project. The temperature of the distribution chain is envisaged to be +5C. The suggested application has the following advantages: 1) Partial thawing of the product in the distribution chain makes it easier to handle. 2) The unhealthy and labour-demanding ...

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 ...

COMSOL Multiphysics® Version 4

Svante Littmarck
President and CEO, COMSOL

Svante Littmarck is the CEO of the COMSOL group. He co-founded COMSOL in 1986. He holds a M.Sc. in Applied Mathematics from the Royal Institute of Technology in Stockholm. In 2004 he received an honorary doctoral degree from the Royal Institute of Technology.

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 ...

The influence of air humidity on the interaction between VOC and construction materials

Radulescu, C., Chicina, A.
LEPTAB

The subject of our study belongs to the large area of studies about the analyze and the prediction of indoor air quality. One of the actual weaknesses for the appreciations of air indoor quality is the lack off knowledge about the interactions between the pollutants and the materials (emission off VOC, adsorption). Knowing the behavior of construction materials we can figure out the possibility ...

Multiphysic FEMLAB modelisation to evaluate mid-infrared photonic detector performances

Cuminal, Y.1, Christol, P.2, Rodriguez, J.B2, Joullié, A.2
1 Laboratoire des Sciences des Matériaux et d’Automatique (LASMEA), Université Clermont II, UMR CNRS 6602, Aubiére, France
2 Centre d’Electronique et de Micro-optoélectronique de Montpellier (CEM2), Université de Montpellier-II, UMR CNRS 5507, Montpellier, France

Infrared photonic detectors operating in the mid infrared region find applications in pollution monitoring, high-speed infrared imaging systems and free space telecommunications. There is a need for new uncooled high performance detector systems and antimonide-based (Sb-based) semiconductor quantum structures could be an alternative of the well-established technologies. The main objective of ...

Inertia Mixer in CD Microfluidics

G. Kylberg

Gyros AB is developing biomedical laboratories in CD-discs, Gyrolab®. In a lot of applications mixers are needed and for some special applications liquid volumes of a few microlitres are to be handled. The mixing of a few microlitres liquids was studied numerically with FEMLAB and experimentally with colored and uncolored water. Thanks to this combination, the main mixing process was ...

A predictive model for the micro-porosity quantitative in Al-Si alloy

Battaglia, J.L., Rozot, J.M.
France

The fatigue is the most important criterion for the securities parts (brake system for example). The increasing use of shaped cast aluminium in the security automotive parts has focused interest on the fatigue of theses alloys. The specific foundry software use empirical laws that do not fit with the reality, above all concerning the aluminium alloys. We proposed a new physical parsimonious ...

FEMLAB analysis of open aluminium foam in compression

Nygaard, J.V.
Interdisciplinary Nanoscience Center (iNANO) Aarhus University, The Faculty of Science, Ny Munkegade, Aarhus C, Denmark.

The analysis of the mechanical properties of bi-continuous structures has been problematic due to the complex geometry that describes these materials. In this study a method which identifies and quantifies the geometrical elements within the structure will be presented. A sample is in-situ compressed and its deformation is compared with the results of a FEMLAB finite element model. Initially, ...

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