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.

Linear Water Wave Propagation around Structures

L. Martinelli, and A. Lamberti
Universita di Bologna, Italy

Objective of this contribution is to show how to implement the Mild Slope Equations with COMSOL Multiphysics. These equations are commonly used to study the propagation of waves in harbors. Some interesting features are presented, namely the use of weak terms (used for the modelling of the source term); the evaluation of a smooth phase gradient from the complex dependent variable; a robust ...

Design of a High Field Gradient Electromagnet for Magnetic Drug Delivery to a Mouse Brain

I. Hoke, C. Dahmani, T. Weyh

Heinz-Nixdorf Lehrstuhl für Medizinische Elektronik, Fakultät für Elektro-und Informationstechnik, Technische Universität München, Germany

The application of nanoparticles coupled with medical agents to brain tumors remains one of the biggest obstacles in neuro scientific research. This work explores an optimal design of an electromagnet to overcome the blood-brain barrier by means of an intensive external magnetic field gradient. It is found that the field gradients depend strongly on the design of the magnet tip. The model ...

Advanced Modeling of Friction Stir Welding – Improved Material Model for Aluminum Alloys and Modeling of Different Materials with Different Properties by Using the Level Set Method

S. Dörfler
Wilhelm Gronbach GmbH, Wasserburg a. Inn, Germany

Friction Stir Welding (FSW) has gained much importance throughout the last years. Beside comprehensive experimental work that has been carried out, the simulation of the welding zone is of major interest.  Due to the high strains observed within the welding zone, the Eulerian (CFD) approach seems to be the most promising for the prediction of flow around the FSW tool. However, the CFD ...

Numerical Modelling of Vortex Induced Vibrations  in Submarine Pipelines

F. Van den Abeele, J. Vande Voorde, and P. Goes
ArcelorMittal Research & Development Industry Gent, Zelzate, Belgium

Vortex-induced vibration is a major cause of fatigue failure in submarine oil and gas pipelines and steel catenary risers. Even moderate currents can induce vortex shedding. In this paper, COMSOL Multiphysics is applied to study the flow pattern around submarine pipeline spans, and predict the amplitude and frequency of the vortex induced vibrations. The sensitivity of the computational fluid ...

Modeling of Respiratory Lung Motion as a Contact Problem of Elasticity Theory

R. Werner, J. Ehrhardt, and H. Handels
University Medical Center Hamburg-Eppendorf, Germany

Breathing motion is a major problem in radiotherapy of lung tumors. The development of techniques to adequately account for respiratory motion requires detailed knowledge about breathing dynamics. Thus, computer aided modeling of respiratory motion gains in importance. In this paper we present an approach to modelling a respiratory lung. Main aspects of the process of lung ventilation are ...

Vertically Emitting Microdisk Lasers

L. Mahler, A. Tredicucci, and F. Beltram
NEST-INFM and Scuola Normale Superiore, Pisa, Italy

We describe the modeling of microdisk lasers displaying vertical emission. The devices are THz quantum cascade lasers with metallic gratings fabricated along the circumference.  The emission properties of the fabricated devices are well explained by the model, good mode control is obtained, and the collected power from a patterned device is increased 50 times with respect to unpatterned ...

COMSOL Multiphysics Simulations of Microfluidic Systems for Biomedical Applications

M. Dimaki, J. Moresco Lange, P. Vazquez, P. Shah, F. Okkels, and W. Svendsen
Department of Micro- and Nanotechnology, Technical University of Denmark, Lyngby, Denmark

The need for fast, easy and cost-effective analysis of blood samples as well as our understanding of the functionality of cells and neurons are two rather pressing issues in the modern world. Both of these can be addressed by functional lab-on-a-chip systems, which have been designed and optimized for specific analyses. This paper deals with the design of several different systems for cell ...

Modeling Implementation of Smart Materials such as Shape Memory Alloys and Electro-Active Metamaterials

Manuel Collet
Femto-STInstitute UMR CNRS 6174 Dept Applied Mechanics,
Besancon, France

Manuel Collet is a member of the Department of Applied Mechanics of the FEMTO-ST Institute. He graduated with a degree in Mechanical Engineering from Ecole Centrale de Lyon in 1992 and obtained his PhD in 1996 about Active control of vibrating structures by mean of semi distributed piezoelectric patches. His main research lines currently involve smart structures and active Control, ...

Design and Simulation of an Electromagnetic Valve Actuator Using COMSOL Multiphysics

R. Wislati , H. Haase
Leibniz Universität Hannover, Germany

In this paper an electromagnetic solenoid actuator (EMVA) consisting of an upper and lower electromagnet, a linear moving armature and two preloaded springs is considered as a potential approach in Variable Valve Actuation (VVA) Systems for Internal Combustion Engines. In opposition to common approaches the underlying EMVA make use of a permanent magnet in the upper electromagnet. The analysis ...

Modelling Coating Lifetime: First Practical Application for Coating Design

T. Machado Amorim [1], C. Allély[1], J. Caire[2]
[1]Arcelor Mittal Research, Maizieres-les-Metz, France
[2]ENSEEG, Grenoble, France

The corrosion at cut-made edges is significant due to the anode to cathode surface ratio in this region. The major problems are the risks of red rust appearance at the exposed steel surface, and the risks of paint delamination in case of insufficient corrosion protection. The work presented here focuses on the development of a 2D FEM model simulating a steady state corrosion situation at a cut ...