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.

Oil Discharge and Transport in a Natural River

Tomas Ekström1,Klara Linden2
1Carl Bro AB Energy, 2Lunds University

A discharge of hydraulic oil is assumed from an hydroelectric power station. The oil is let out through the outlet from the turbines and is spread into the river. The flow of water, or more correctly, the solution of water and oil, is calculated by Navier-Stoke equation for incompressible fluids. The concentration of oil is calculated by a mass-balance equation. It is assumed that oil is absorbed ...

Using COMSOL Multiphysics in Advanced Engineering

Advanced Computational & Engineering Services
Columbus, Ohio

In this presentation we give a thorough introduction to advanced engineering using COMSOL Multiphysics. We introduce you to many disciplines of engineering and physics as well as multidisciplinary, multiscaled multiphysics.

Numerical Validation of the Efficiency of Dual-Frequency Radiofrequency Ablation

A. Candeo[1] and F. Dughiero[1]
[1]Department Electrical Engineering, University of Padova, Padova, Italy

Radiofrequency Ablation (RFA) represents a valid alternative for treating liver metastases in medically complicated patients. Conventional devices currently operate at 500 kHz, due to good conducting properties of tissues. However, the use of lower frequencies (i.e. 20 kHz) has been recently reported to enhance the treatment effectiveness, due to a more pronounced difference in electrical ...

Applying Grain Continuum Models to Stress Induced Grain Evolution in Next Generation Integrated Circuit Interconnects

D.N. Bentz, M. Bloomfield, J-Q. Lu, R.J. Gutmann, and T.S. Cale
Focus Center—New York, Rensselaer: Interconnects for Hyperintegration

We discuss the use of 3D grain continuum modeling to study grain boundary migration driven by differences in strain energy density. COMSOL Multiphysics is used to compute stresses and strain energy densities in polycrystalline structures caused by temperature changes. The grain boundary speeds are computed using a simple model that relates them to grain boundary mobility and differences ...

Induced Charge Electroosmosis (ICEO) on a Planar Surface

G. Soni, C. Meinhart, and T. Squires
University of California Santa Barbara

Induced Charge Electroosmosis (ICEO) refers to a fluid flow phenomenon in which an electric field induces a charge cloud (electric double layer) on a polarizable surface and sets up a tangential electric field to move this charge cloud along the surface, which in turn causes a fluid flow pattern. In our case, we considered nonlinear effects such as nonlinear capacitance, surface conduction, ...

Drying of Corn Kernels: From Experimental Images to Multiscale Multiphysics Modeling

P. Takhar[1], and S. Zhang[2]

[1]Texas Tech University, Lubbock, Texas, USA
[2]Visualization Sciences Group Inc., Burlington Massachusetts, USA

This work demonstrated the importance and feasibility of experimental image to simulation workflow. The workflow is successfully applied to a food processing study, where multiphysics and multiscale modeling based on 3D experimental image reconstruction contributes to the preservation of corn, one of the major food sources for the world population.

Propagation of Crevice Corrosion by Numerical Modelling

A. Proust[1], G. Girardin[1], B. Vuillemin[2], P. Combrade[1], and R. Oltra[2]
[1] AREVA NP - Centre Technique - Département Corrosion-Chimie, Le Creusot
[2] Université de Bourgogne - Laboratoire de Recherche sur la Réactivité des Solides

The most common case of crevice corrosion occurs on passive materials such as stainless steels, in oxidizing-chloride environments. A flexible crevice propagation model has been developed to allow parametric studies of the solution. Our main results allow us to establish diagrams of stability of solid and gas phases within the crevice and to evaluate the influence of the external ...

Spatial Model of Glycolysis in Neutrophils

T.A. Hansen, and L.F. Olsen
Department of Biochemistry and Molecular Biology, University of Southern Denmark

In an attempt to understand the mechanism and function of NAD(P)H waves in neutrophils, we have constructed a spatial model of glycolysis in neutrophils. The model does give rise to traveling NADH waves, but there are significant differences between the experimentally observed waves and the waves generated by the model. Based on the model we therefore conclude that it is doubtful that the ...

COMSOL Multiphysics (FEMLAB) Modelling of Field Enhancements as a Result of Scattering from Metallic Nanostructures

Jian Wang
National Physical Laboratory
Teddington, UK

SERS is a candidate method for signle molecule detection. "Rough" metal surfaces or structured metal surfaces are often employed to obtain the desired enhancement through a coherent scattering process. We have modeled this process to gain a better understanding of it, and here present the results. --------------------------------- Keynote speaker's biography: Dr Jian Wang is a senior ...

The use of FEMLAB in the electrochemical education

Alessandro Lavacchi
Università degli Studi di Firenze
Florence, Italy

With the equation-oriented structure of COMSOL, it is easy to link the knowledge acquired during the theoretical electrochemical course with simulation. With COMSOL, "playing" with the parameters is easy. In conclusion, COMSOL is a good compromise between the user friendly electrochemical software and the writing of dedicated program code. --------------------------------- Alessandro Lavacchi ...

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