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Suchbegriff:

2D/3D Design and Evaluation of a TE Single Mode Si-on-SiO2 Waveguide for Mid-IR CO2 Sensing Purposes

L. Melchiorre¹, F.A. Sfregola², A. Zifarelli², G. Menduni¹, A. Sampaolo¹
¹Politecnico di Bari
²Università degli Studi di Bari

In this work, a 2.8x0.22 μm^2 silicon strip waveguide (n = 3.43 @4.234 μm) on a silica substrate (n = 1.38 @4.234 μm) and a superstrate with n = 1 was designed and evaluated through 2D (i.e., mode analysis), and 3D (i.e., wave propagation) analysis to strengthen the interaction between ... Mehr lesen

Influence of dielectric constant on low-moisture food pasteurisation in a 915 MHz microwave cavity

Olivier Rouaud¹, Ana-Caroline C. Frabetti², Tristan Garnault², Hugo Curto², Alexandre Thillier², Sebastien Curet¹
¹Oniris, Nantes Université, CNRS, GEPEA, UMR 6144, F-44000 Nantes, France
²SAIREM - 82 Rue Elisée Reclus, 69150 Décines-Charpieu, Lyon, France

The contamination of food products with low water contents is a safety issue that cannot be disregarded. Despite their low water activity, they are indeed susceptible to infection by micro-organisms that are highly resistant to heat. In this case, conventional pasteurisation techniques ... Mehr lesen

Modeling of a Hybrid-Integrated Moving Magnet Drive for a Quasi-Static 2D-MEMS Vector Scanner

Klemens Birnbaum¹, Martin Blasl², Benjamin Mustin², Thilo Sandner²
¹Institute of Automation, Faculty of Electrical and Computer Engineering, TUD Dresden University of Technology, 01062 Dresden, Germany
²Fraunhofer Institute for Photonic Microsystems, Maria-Reiche-Str. 2, 01109 Dresden, Germany

Quasi-static 2D-MEMS vector scanners are micro-opto-electro-mechanical systems (MOEMS) made of monocrystalline silicon. The primary application for these controllable micromirrors is the high dynamic and precise deflection of laser beams, for example in light detection and ranging ... Mehr lesen

Guided Wave in Engineering Structures Using Non-Contact Electromagnetic Acoustic Transducers: A Numerical Approach for the Technique Optimisation

S. Soua[1], A. Raude[1], and T-H. Gan[1]
[1]NDT Technology Group, TWI Ltd, Cambridge, United Kingdom

There are over 10 million kilometers of pipes and pipelines around the world that carry hazardous fluids and gases. Fluids include oil, oil products, chemicals such as solvents, caustics, acids, corrosives and combustibles often at high pressure and temperature. These pipes are ... Mehr lesen

Analytical and Experimental Validation of Electromagnetic Simulations Using COMSOL®, re Inductance, Induction Heating and Magnetic Fields

M. W. Kennedy, S. Akhtar, J. A. Bakken, and R. E. Aune
Norwegian University of Science and Technology (NTNU)
Trondheim, Norway

This paper presents a snap shot of experimental work, which has been conducted at NTNU on billet heating with induction coils. A significant volume of experimental data have been collected for coils running with up to 0.2T: high accuracy Hall probe readings (+/-1%), metal ... Mehr lesen

Transient Electromagnetic-Thermal FE-Model of a SPICE-Coupled Transformer Including Eddy Currents with COMSOL Multiphysics 4.2

H. Neubert[1], R. Disselnkötter[2], and T. Bödrich[1]
[1]Technische Universität Dresden, Institute of Electromechanical and Electronic Design, Dresden, Germany
[2]ABB AG, Forschungszentrum Deutschland, Ladenburg, Germany

Current transformers are used to measure currents in power grid systems. They are characterized by strong interactions between external electrical sources and loads respectively and the magnetic subsystem. Self-heating due to losses has to be considered because of the temperature ... Mehr lesen

Numerical Study on Shear Horizontal Electromagnetic Acoustic Transducers for Generation of Ultrasonic Guided Waves for Absorber Tubes used in Concentrated Solar Plants

L. Cheng[1], A. Mohimi[1], M. Kogia[1], V. Kappatos[1], C. Selcuk[1], T.-H. Gan[1]
[1]Brunel Innovation Centre, Brunel University, Uxbridge, UK

Absorber tubes are one of the most critical components of parabolic trough Concentrated Solar Plants, which is very likely get damaged such as crack and mass loss. Therefore, the monitoring of their structural health via Non-Destructive Testing (NDT) techniques is regarded as essential ... Mehr lesen

Robust and Reliability-based Design Optimization of Electromagnetic Actuators Using Heterogeneous Modeling with COMSOL Multiphysics and Dynamic Network Models

H. Neubert[1], A. Kamusella[1], and T-Q. Pham[2]
[1]Technische Universität Dresden, Germany
[2]OptiY e. K. Aschaffenburg, Germany

For an exemplary electromagnetic actuator used to drive a Braille printer, a design optimization was performed. The optimization involves stochastic variables and comprises nominal optimization, robustness analysis and robust design optimization. A heterogeneous model simulates the ... Mehr lesen

Artificial Magnetism obtained through Mie Resonances in High-Index Hollow Spheres

A. Contestabile¹, G. Castaldi², V. Galdi², A. Galante³, M. Alecci³, D.Burov¹, C. Rizza¹
¹University of L’Aquila, Department of Physical and Chemical Sciences, I-67100 L’Aquila, Italy
²University of Sannio, Department of Engineering, Fields & Waves Lab, Benevento, I-82100, Italy
³University of L’Aquila, Department of Life, Health Environmental Sciences, I-67100 L’Aquila, Italy

The pursuit of artificial magnetism within metamaterials research has long been a focal point. Traditional methods rely on analyzing complex configurations such as arrays of subwavelength particles or split-rings, but unfortunately they fail at subwavelength scales. Revisiting Mie theory ... Mehr lesen

Introduction of a Magneto‐Elastic Constitutive Law in COMSOL Multiphysics® for the Numerical Simulation of a Magneto‐Mechanical Characterization Setup

L. Santandrea¹, E. Wasniewski², L. Daniel³
¹Laboratoire de Génie ́Electrique et ́Electronique de Paris, CNRS, Gif sur Yvette, France
²CETIM, Senlis, FRANCE
³Laboratoire de Génie ́Electrique et ́Electronique de Paris, CentraleSupélec, Gif sur Yvette, France

As part of its research, the Group of Electrical Engineering – Paris (GeePs) uses the COMSOL Multiphysics® software for applications such as material modelling in Electrical Engineering, electromagnetic compatibility and electromagnetic non-destructive testing. Some problems involve ... Mehr lesen

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