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.

Optimization of Micro-Structured Waveguides in Lithium Niobate (Z-Cut)

H. Karakuzu[1], M. Dubov[1], S. Boscolo[1]
[1] Aston University, Birmingham, UK

We present an optimization procedure to improve the propagation properties of the depressed-cladding, buried micro-structured waveguides formed in a z-cut lithium niobate (LN) crystal by high repetition rate femtosecond (fs) laser writing. It is shown that the propagation wavelength for which the confinement losses of ordinary (O) and extraordinary ordinary (E) polarizations are below 1 dB/cm ...

Understanding the Magnetic Field Penetration in Mesoscopic Superconductors via COMSOL Multiphysics® Software

I. G. de Oliveira[1]
[1]Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ, Brazil

Introduction: One of the main characteristic of the superconductors is its diamagnetic response of applied magnetic fields. The superconductors refuse the penetration of magnetic field into its interior, it is the well know Meissner effect, B=0 into the superconductor sample. However when the applied field reach a determined value, the magnetic field can enter. There are two different ways of ...

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. ...

Including Expert Knowledge in Finite Element Models by Means of Fuzzy Based Parameter Estimation

O. Krol[1], N. Weiss[1], F. Sawo[1], and T. Bernard[1]

[1]Fraunhofer Institute for Information and Data Processing, Karlsruhe, Germany

In this paper we present a novel approach for modeling spatial distributed bio- chemical and environmental processes like the growth of plants and the related biochemical reactions. The physical phenomena like flow and mass transport can be described by fluid dynamics equations, but for effects like growth rates often no analytic models are available. However, in many cases experts have knowledge ...

Teaching Computer-aided Modeling of Biomedical Processes in an Upper Level Undergraduate Course using COMSOL Multiphysics

V. Rakesh, and A. K. Datta
Dept. of Biological and Environmental Engineering, Cornell University, Ithaca, NY, USA

Computer-Aided Engineering: Applications to Biomedical Processes is a three credit course intended for seniors and juniors in Biological Engineering and Mechanical Engineering at Cornell University with a class size of about 50-55 students.The course introduces finite element modeling using COMSOL Multiphysics to solve biological/biomedical problems to students with a background in transport ...

Investigations on Hydrodynamic in Stirred Vessels for Educational Purposes

A. Egedy, T. Varga, and T. Chován
University of Pannonia
Department of Process Engineering
Veszprém, Hungary

With detailed hydrodynamic modelling of a system the critical parameters and operation limits can be determined. In the field of fluid dynamic and reactor engineering one of the most important aspects is the practical knowledge of future engineers and technicians. In our research several different reactor constructions and impeller configurations were modelled to achieve a better ...

Making Cartograms and Using them for Data Acquisition

P. Mercure[1], and R. Haley[2]
[1]The Dow Chemical Company, Midland, MI
[2]ATM Research, Midland, MI

We demonstrate cartogram construction, where a geographical map is distorted to represent some measure, for example population, while trying to keep the shape of regions recognizable. We then apply this cartogram construction technique to optimize thermocouple locations. A heat generation and conduction model is used initialize the cartogram construction algorithm. A uniform distribution of ...

Multiphysics Software Applications in Reverse Engineering

W. Wang[1], K. Genc[2]
[1]University of Massachusetts, Lowell, MA, USA
[2]Simpleware, Exeter, United Kingdom

During the past decade reverse engineering has become a common and acceptable practice utilized by many aftermarket suppliers, and even original equipment manufacturers (OEM). This presentation focuses on the applications of multiphysics software such as COMSOL and Simpleware® in reinventing the design details and manufacturing processes of an existing part in the absence of the original design ...

Cloud Computations for Acoustics with Coupled Physics

A. Daneryd[1], D. Ericsson[2]
[1]ABB Corporate Research, Västerås, Sweden
[2]COMSOL AB, Stockholm, Sweden

For certain classes of scientific and technical computations the cloud may offer easily accessible, scalable, and affordable gigantic computing power. A power that for these classes may lead to a step change in model and analysis complexity compared to what is feasible with dedicated clusters and similar networked solutions. Acoustics with or without interaction with coupled physics fields ...

Multicomponent Diffusion Applied to Osmotic Dehydration

H. Cremasco[1], K. Angilelli[1], D. Borsato[1]
[1]Universidade Estadual de Londrina, Londrina, Paraná, Brazil

The transfer of sucrose and fructooligosaccharides to melon and water to solution was modeled based on generalized form of Fick’s second law for simultaneous diffusion and resolved by the finite element method using the software package COMSOL Multiphysics® software. The diffusion coefficients, the mass transfer coefficient and the Biot number were determined using the simplex ...

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