A.Buchau, and W. M. Rucker
Institut für Theorie der Elektrotechnik
The simulation software COMSOL Multiphysics is applied to the numerical com-putation of the magnetic fields of a three-phase transformer. A three-dimensional model of the geometrical configuration is created with the help of the CAD tools of COMSOL Multiphysics. There, all dimensions of the transformer are defined by parameters. The creation of an optimal finite element mesh is improved by some ...
I. Quintana, Z. Azpilgain, D. Pardo, and I. Hurtado
Mechanical and Industrial Production Department, Faculty of Engineering, Mondragon Unibertsitatea, Loramendi 4, Mondragon 20500 Gipuzkoa, Spain
Department of Applied Mathematics, Statistics, and Operational Research, University of the Basque Country (UPV/EHU), Leioa, Spain, and IKERBASQUE (Basque Foundation for Sciences), Bilbao, Spain
This paper describes a numerical solution method for the simulation of a cold crucible induction melting (CCIM) process involving the coupling of electromagnetic, temperature and turbulent velocity fields. During the CCIM process, the metal charge is contained on a water cooled segmented copper crucible, and the energy necessary to heat, melt, and overheat the charge is generated by an ...
S. F. Madsen, and C. Falkenstrøm Mieritz
The present paper presents numerical calculations of the magnetic fields and the current distribution within a wind turbine nacelle. The results are used by control system engineers designing panels and cables, who must ensure that the immunity of the equipment complies with the environment within the turbine. Since the release of the International standard concerning lightning protection of ...
Military University of Technology
The article presents the process of verification of the passive magnetic bearing by the Comsol Multiphysic program. There is shown construction of the radial passive magnetic bearing PMB60x85x20-5, which was designed in the Military University of Technology. The distribution of the magnetic flux density and the static characteristic of the bearing were estimated by the Comsol Multiphysic. The ...
The safety of large civil structures is often evaluated by means of numerical models based on the Finite Element Method. In this frame, the choice of a constitutive law able to represent the complex mechanical behaviour of concrete is a key point. This paper deals with a detail description of all the steps needed to implement the Microplane Model in COMSOL; the formulation is based on the ...
M. Herlitschke, M. Blasl, and F. Costache
Fraunhofer Institute for Photonic Microsystems
3D FEM simulation of millimeter-scale, complex electro-optically induced waveguide based devices demands the use of grids with more than several million nodes. Hence the simulation could take substantial time and require large amounts of available memory. This paper presents a computation algorithm based on the conversion of an initial 3D waveguide structure into an analogous 2D structure, ...
Design and Development, via Prototype Testing and Multiphysics Modelling, of a Thermoelectric Generator (TEG) for Integration in Autonomous Gas Heaters
M. P. Codecasa, C. Fanciulli, R. Gaddi, F. Gomez Paz, and F. Passaretti
National Research Council of Italy - IENI Institute, Lecco, Italy
Italkero S.r.l., Modena, Italy
Studio di design Francisco Gomez Paz, Milano, Italy
An autonomous gas-heater for outdoor environments was selected as a test-case for cogeneration in gas-heaters and stoves, permitting installation and operation without need of an electrical network connection. A thermoelectric generator (TEG) was designed, converting part of produced heat into electrical power for auxiliaries (ventilation) or ancillary functions (illumination). Design approach, ...
Electrochemical etching of silicon (anodization) is a process that can be used for etching of forms of nearly arbitrary shapes. The difficulty of applying the process for mass production is in the many parameters influencing the process, such as electrolyte concentration and temperature, silicon substrate doping and type, and so on. COMSOL as an FEM simulation tool is very suitable for ...
L. Spicci, and M. Cati
The present paper describes the development of a full FEM model for linear array high performance 5MHz ultrasound imaging transducer. As a preliminary design, a mono dimensional electro-acoustical KLM model was realized, then the complete FEM was developed and optimized. The optimized transducer was manufactured, so that agreement between transducer measured performances and simulation ...
M. Bachmann, V. Avilov, A. Gumenyuk, and M. Rethmeier
BAM Federal Institute for Materials Research and Testing
The article deals with the magnetically-supported high-power full-penetration laser beam welding of aluminum. A stationary simulation was conducted accounting for the effects of natural convection, Marangoni convection and solid-liquid phase transition as well as an electromagnetic volume source term. An ac magnet below the weld specimen induces eddy currents. Consequently, Lorentz forces occur ...