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Ampacity Simulation of a High Voltage Cable Used in Offshore Wind Farms

E. Pelster[1]
[1]Wenger Engineering, Ulm, Germany

The ampacity of a cable depends on the cross section of its conductor. When selecting a cable design for a specific application it is of interest to choose the lowest possible conductor cross section in order to reduce material costs. Therefore an exact calculation of the ampacity is necessary (it is usually limited by the thermal resistance of the insulating cable materials). Commonly the ...

A Numerical Comparison of Dielectric based Measurement of Atmospheric Ice Using COMSOL

U. N. Mughal[1], M. S. Virk[1]
[1]Narvik University College, Narvik, Norway

Atmospheric ice is a very complex material with varying electrical properties due to different polymorphs of ice itself. Also, if the medium to be considered is snow, then density becomes an additional parameter because it is a mixture of three dielectrics water, ice and air. The permittivity and loss tangent of naturally occurring ice and snow shows lot of variation at different conditions ...

Numerical Investigation of the Convective Heat Transfer Enhancement in Coiled Tubes

L. Cattani[1]
[1]Dipartimento di Ingegneria Industriale, Università degli Studi di Parma, Parma, Italy

The work is focused on the numerical analysis of forced convection in curved tubes investigating the correlation between the heat transfer and friction factor enhancement and the effects of the wall curvature. The analysis was performed by integrating the continuity, momentum and energy equations within COMSOL Multiphysics. The local Nusselt number reaches values higher than the ones expected ...

Thermal Simulations of a LED Light Using COMSOL Multiphysics

M. Maaspuro[1]
[1]University of Turku, Turku, FInland

An experimental LED light composed of a multi-chip LED-module, a LED driver and an efficient heat sink, was investigated using COMSOL Multiphysics software and the Heat Transfer Module. In an LED light heat is mainly generated in the LEDs but some amount of heat is generated also in the LED driver. The main target of the simulations was to resolve the junction temperatures of LEDs, the most ...

Numerical Modeling of Powder Flow During Coaxial Laser Direct Metal Deposition: Comparison Between Ti-6Al-4V Alloy and 316L Stainless Steel

S. Morville[1], M. Carin[1], D. Carron[1], P. Le Masson[1], M. Gharbi[2], P. Peyre[2], R. Fabbro[2]
[1]Université de Bretagne-Sud/UEB-LIMATB, Lorient, France
[2]PIMM, Arts et Métiers ParisTech, Paris, France

This paper presents a 3D numerical model to predict the whole process of coaxial powder flow, including the particle stream flow in and below the nozzle and also the laser-particle interaction process. The Particle Tracing Module of COMSOL Multiphysics is used to solve the coupled momentum transfer equations between the particle and gas phase while incorporating particle temperature evolution. A ...

Modeling Microwave Chiral Material Based On Crank Resonators Arrays Using COMSOL Multiphysics

J. Muñoz[1], G.J. Molina [1], M.M. Rojo[1]
[1]Dpto. Electromanetismo y Electrónica, Facultad de Química, Universidad de Murcia, Campus Espinardo, Murcia, Spain

Electromagnetic metamaterials present exotic and unusual properties hardly to be found in nature with many potential applications. They are usually built by distributing small resonant structures in periodical lattices. If the structure has chiral symmetry, the medium is called chiral metamaterial. Here the electrodynamics behavior of a chiral structure with a huge electromagnetic activity at ...

Utilization of COMSOL Multiphysics' JAVA API for the Implementation of a Micromagnetic Modeling and Simulation Package with a Customized User Interface

L. Teich[1], A. Hütten[2], C. Schröder[1]
[1]Department of Engineering Sciences and Mathematics, Computational Materials Science & Engineering (CMSE), University of Applied Sciences Bielefeld, Bielefeld, Germany
[2]Department of Physics, Thin Films and Nanostructures, Bielefeld University, Bielefeld, Germany

One of the big advantages of COMSOL Multiphysics is the possibility to implement user-defined partial differential equations (PDE) which can be coupled to COMSOL\'s predefined physics interfaces. However, using the tool’s standard user interface requires manual implementation of the PDEs and a multitude of problem-specific parameters. This process is not just error-prone but also very time ...

Comparison of Heat and Mass Transport at the Micro-Scale

E. Holzbecher[1], S. Oehlmann[1]
[1]Georg-August Universität Göttingen, Göttingen, Germany

Phenomena of heat and mass transfer are often compared, in various porous media applications. Questions of practical interest are, for example, if tracers can be used for the prediction of heat flow, or vice versa if heat can be utilized as, possibly retarded, tracer for predicting the migration of contaminants, nutrients or other substances. Using numerical modelling in artificial porous media ...

Modeling the Chemical Decomposition of Sodium Carbonate Peroxyhydrate

M. Brundu[1], V. Guida[1]
[1]Procter & Gamble Italia, Pomezia, Roma, Italy

The challenge with the use of Sodium Carbonate Peroxyhydrate (Na2CO3*1.5H2O2) as a bleach source in dry detergent formulations is its lower stability in comparison with other materials, and the risk of quality losses of the product over the shelf life. The issue can be solved with the understanding and modeling of the decomposition mechanism of the powder. It is well known that the decomposition ...

Dynamic Simulation of Electrochemical Etching of Silicon with COMSOL

A. Ivanov[1], U. Mescheder[1]
[1]Furtwangen University, Furtwangen, Germany

In the presented work the dynamic simulation of a silicon anodization process is performed. Two mechanisms of etch form development (diffusion in electrolyte, current flow) are considered and simulated. Influence of electrolyte conductivity and radius of the opening in the masking layer is discussed.