K. Ehrhold, S. Christiansen[1,2], and U. Gösele
Max Planck Institute of Microstructure Physics, Halle, Germany,
Institute of Photonic Technology, Jena, Germany
Plasmonics is a new branch of the fascinating field of photonics and develops concepts to quench light beyond the diffraction limit and enhance electromagnetic fields. These enhancements occur in metals as localized surface plasmon polaritons (LSP) a coupling of the surface density oscillations of the electron gas to the incident light. With threedimensional nano-structures of coinage metals that ...
Dinex Emission Technology A/S, Middelfart, Denmark
Exhaust noise must meet legislation targets, customer expectations and cost reduction which call for design optimization of the exhaust systems in the design phase. One solution is to use 3 dimensional linear pressure acoustics and calculate the transfer matrix of the muffler. The transfer matrix is the basis for calculating either the insertion loss or transmission loss of a muffler. The 3D ...
T. Machado Amorim , C. Allély, J. Caire
Arcelor Mittal Research, Maizieres-les-Metz, France
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 ...
H. Schmidt[1,2], and J. Hattel
Technical University of Denmark, Kgs. Lyngby, Denmark
HBS Engineering, Frederiksberg, Denmark
Two friction stir welding models are presented – a global thermal model using the temperature dependent heat source and a local material flow and heat generation model allowing for detailed investigation of different contact conditions. The two models are coupled into a larger local-global model. The flow model includes frictional dissipation from the contact between the work piece and the ...
O. Kiriyenko, W. Hergert, S. Wackerow, M. Beleites, and H. Graener
Inst. für Physik, Martin-Luther-Universität Halle-Wittenberg, Germany
Glass containing nanoparticles is a promising material for various photonic applications due to the unique optical properties mainly resulting from the strong surface plasmon resonance (SPR) of the silver nanoparticles. The characteristics of the resonance can be modified by varying size, shape and concentration of the particles. A finite element method (FEM) implemented in the software COMSOL ...
E. Le Guen, R. Fabbro, F. Coste, M. Carin, and P. Le Masson
LALP (CNRS)/GIP GERAILP, Arcueil, France
LIMATB, Université de Bretagne Sud, Lorient, France
Hybrid laser-MIG arc welding has very interesting advantages compared to laser welding or arc welding used separately. It is known that improvement of productivity results in higher welding speeds, thicker welded materials, joint fit-up allowance, better stability of molten pool, and improvement of joint metallurgical quality. In order to use these techniques efficiently in industrial production, ...
Multiphysics Simulation of Thermoelectric Systems - Modeling of Peltier-Cooling and Thermoelectric Generation
Fraunhofer-Institute for Physical Measurement-Techniques (IPM), Freiburg, Germany
Electro-thermal interaction is commonly considered only as a matter of joule heating. In addition, the Seebeck-, Peltier- and Thompson-Effects are significant in materials with high thermoelectric figure of merit Z. These thermoelectric materials have a high Seebeck-coefficient α, a good electric conductivity σ, and a poor thermal conductivity λ. They have widespread areas of ...
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
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 ...
Prediction and Optimization of Surface-Enhanced Raman Scattering Geometries using COMSOL Multiphysics
I. Knorr, K. Christou, J. Meinertz, A. Selle, J. Ihlemann, and G. Marowsky
Laser-Laboratorium Göttingen e.V., Germany
Raman spectroscopy is a commonly used tool in biodiagnostics and sensor technology. Surface-enhanced Raman scattering provides high signal enhancements especially at nanostructured metallic surfaces. In this paper the electromagnetic Raman enhancement from different metallic nanostructures - including gold coated gratings, spherical and hemispherical particles - is calculated by using the finite ...
G. Cammarata, and G. Petrone
Department of Industrial and Mechanical Engineering, University of Catania, Catania, Italy
In this study fluid-dynamical and thermal performance of active chilled beams is investigated by 2D and 3D modelling in COMSOL Multiphysics. Three different typologies of those air conditioning systems are considered. Results, obtained for typical range of variation of operational conditions, are principally produced as temperature and velocity distributions. Special attention is paid to the ...