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.

Chemical Reactions in a Microfluidic T-Sensor: Numerical Comparison of 2D and 3D Models

R. Winz[1][2], N. Schröder[1], W. Wiechert[1], and E. von Lieres[1]
[1]Institute of Biotechnology 2, Research Centre Jülich, Jülich, Germany
[2]Research Center for Micro and Nanochemistry, University of Siegen, Siegen, Germany

In recent years lab-on-microchip technology has become a powerful tool for micro-scale analysis of biochemical processes. In the studied system the overall process consists of transport, convection, diffusion, reaction and adsorption processes. Two compounds A and B, contained in a carrier fluid (buffer), are introduced into a reaction channel via a Y-shaped double-inlet. As the streams flow ...

Classical Models of the Interface Between an Electrode and an Electrolyte

E. Gongadze[1], S. Petersen[1], U. Beck[2], and U. van Rienen[1]
[1]Institute of General Electrical Engineering, University of Rostock, Rostock, Germany
[2]Institute of Electronic Appliances and Circuits, University of Rostock,
Rostock, Germany

The Electrical Double Layer (EDL) plays a major role in understanding the interface between a charged surface (e.g. an implant) and ionic liquids (e.g. body fluids). The three classical models of the EDL (Helmholtz, Gouy, and Chapman-Stern) are numerically solved for a flat surface electrode in the 3D Electrostatics application mode of COMSOL Multiphysics® 3.5a. The values of the electric ...

Growth and Remodelling of Intracranial Saccular Aneurysms

A. Di Carlo[1], V. Sansalone[2], A. Tatone[3], and V. Varano[1]
[1]Modelling and Simulation Lab, Università Roma Tre, Roma, Italy
[2]Laboratoire de Mécanique Physique, Université Paris Est, Paris, France
[3]DISAT, Università degli Studi dell’Aquila, L'Aquila, Italy

We present a mechanical model a growing spherical shell suitable for predicting the evolution of a Saccular Cerebral Artery Aneurysms (SCAA). It relies basically on the Kröner-Lee decomposition, used to describe the interplay between the current and the relaxed configuration of body elements. Rupture or stabilization of a SCAA are the end effect of a number of biological mechanisms, still poorly ...

Numerical Modelling of a Free-Burning Arc in Argon. A Tool for Understanding the Optical Mirage Effect in a TIG Welding Device

J-M. Bauchire[1], E. Langlois-Bertrand[1], and C. de Izarra[1]
[1]GREMI, CNRS, Université d’Orléans, Orléans, France

In this paper, we present the numerical modelling of a free-burning arc and its application to the understanding of optical mirage effect which could occur in a TIG (Tungsten Inert Gas) device used in welding applications.

A Study of Optical Sensor Based on Fiber Bragg Grating Using COMSOL Multiphysics®

C. Gavrila[1] and I. Lancranjan[2]

[1]Technical University of Civil Engineering Bucharest, Bucharest, Romania
[2]Advanced Study Centre, National Institute for Aerospace Research “Elie Carafoli”, Bucharest, Romania

Fiber optic sensors can measure a large range of physical, chemical and environmental variables such as temperature, pressure, shape, position, chemical concentration, moisture, etc. Fiber optic sensors provide measurements in applications where the conventional electrical based sensors cannot be used, due to measurement requirements such as extreme temperature, small size, high sensor count, or ...

Failure Modes of Underground MV Cables: Electrical and Thermal Modelling

P.A. Wallace[1], M. Alsharif[1], D.M. Hepburn[1], and C. Zhou[1]
[1]Department of Energy Systems Engineering, Glasgow Caledonian University, Glasgow, United Kingdom

Two simulations of the performance of a Paper Insulated Lead Covered (PILC) Medium Voltage (MV) underground cable are presented. The first presents the thermal response of a cable, over seven days, to a realistic load with a diurnal variation. The second concentrates on the variation of the electric field stress within the cable over a single AC cycle. The effects of a void defect within the ...

Finite Element Analysis of Thermal Fatigue in Thermal Barrier Coatings

U. Bardi[1], C. Borri[1], A. Fossati[1], A. Lavacchi[1], and I. Perissi[1]
[1]Dipartimento di Chimica, Università degli Studi di Firenze, Sesto Fiorentino, FI, Italy

A Finite element model of plasma sprayed TBC’s was developed to estimate the stress induced by thermal cycling experiments. A heat transfer analysis was performed to evaluate the temperature distribution on the specimen during the cooling under an impinging air jet; temperature measurements performed with an infrared pyrometer on the cooled samples show good agreement with the evaluated ...

Dynamic Crack Propagation in Fiber Reinforced Composites

C. Caruso[1], P. Lonetti[1], and A. Manna[1]

[1]Department of Structural Engineering, University of Calabria, Arcavacata di Rende, CS, Italy

A generalized model to predict dynamic crack propagation in fiber composite structures is proposed. The proposed approach is based on a generalized formulation based on the Fracture Mechanics approach and Moving mesh methodology. Consistently to the Fracture Mechanics, the crack propagation depends from the energy release rate and its mode components, which are calculated by means of the ...

A Preliminary Approach to the Neutronics of the Molten Salt Reactor by Means of COMSOL Multiphysics®

V. Memoli[1], A. Cammi[1], V. Di Marcello[1], and L. Luzzi[1]
[1]Nuclear Engineering Division, Department of Energy, Politecnico di Milano, Milano, Italy

The Molten Salt Reactor (MSR), proposed along with other five innovative concepts of fission nuclear reactor by the Generation IV International Forum (GIF-IV), represents a challenging task from the modeling perspective because of the strong coupling between neutronics and thermo-hydrodynamics due to liquid fuel circulation in the primary loop. In this paper COMSOL Multiphysics® is adopted to ...

Numerical Modeling of Resistance Welding Process in Joining of Thermoplastic Composite Materials Using COMSOL Multiphysics®

R. Carbone[1] and A. Langella[1]
[1]Material and Production Engineering Department, Università degli Studi di Napoli Federico II, Napoli, Italy

This paper deals of a technology involved in the joining of thermoplastic composites, the resistance welding technology. This process takes advantage in the repeatable melting process for the thermoplastic resins. The process was numerically modeled to study the effect of the two main process parameters, the electric power density applied to the heating elements and the exposure time at the ...