Veröffentlichungen und Präsentationen

Hier finden Sie Veröffentlichungen und Präsentationen der weltweit stattfindenden COMSOL-Konferenzen. In diesen präsentieren Ihre Fachkollegen ihre neuesten mit COMSOL Multiphysics entwickelten Produkte und Ideen. Die Forschungsthemen umfassen ein weites Feld von Industrien und Anwendungsbereichen, die von Mechanik und Elektronik über Strömungen bis zur Chemie reichen. Nutzen Sie die Quick Search, um die zu Ihrem Forschungsbereich passenden Präsentationen zu finden.

Thermal Modelling of a Solar Water Collector Highly Building Integrated

F. Motte, and C. Cristofari
University of Corsica
Laboratory of Vignola
Ajaccio
Corsica, France

A new concept of solar water collector, highly building integrated has been developed and patented. This collector is hidden into a drainpipe and is totally invisible from the ground level. The drainpipe keeps its water evacuation function. Each installation is composed of several modules serial connected. An experimental wall has been build to test the thermal performances of the instalation ...

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 conductivity (+/-0.5%), and heat generation (+/- 4%) have been collected. Results are analyzed using newly developed ...

Fluid-Structure Interaction Modeling for an Optimized Design of a Piezoelectric Energy Harvesting MEMS Generator

I. Kuehne[1], A. van der Linden[2], J. Seidel[1], M. Schreiter[1], L. Fromme[2], and A. Frey[1]
[1]Siemens AG, Corporate Research & Technologies, Munich, Germany
[2]Comsol Multiphysics GmbH, Göttingen, Germany

This paper reports the design of a piezoelectric energy harvesting micro generator for an energy autonomous tire pressure monitoring wireless sensor node. For our design we use a piezoelectric MEMS generator approach without additional mass. The intrinsic mass of the cantilever is in the microgram region and the resulting acceleration forces are very small. The generator has a triangular ...

Transient Modelling of a Fluorine Electrolysis Cell; Fully Coupled Electric Currents, Heat-Transfer, Diluted Species Transport and Laminar Bubbly Flow

R. Pretorius[1], P. L. Crouse[1], and C. J. Hattingh[2]
[1]University of Pretoria, Pretoria, Gauteng, South Africa
[2]Metallurgical Testing and Consultation (MTC) cc, Farrarmere, South Africa

A laboratory-scale fluorine reactor was simulated with COMSOL Multiphysics®. This model employs fundamental fully coupled electron-, heat-, mass- and momentum transfer (two-phase) equations to deliver a transient model of the above-mentioned reactor. Quasi-steady-state results were produced for the current density, electric field, temperature, reactive species concentration, gas- and liquid ...

Direct Pore-scale Modeling of Two-phase Flow Through Natural Media

I. Bogdanov, J. Kpahou, and A. Kamp
Open and Experimental Centre for Heavy Oil (CHLOE)
University of Pau
Pau, France

Direct numerical simulation of single- and two-phase flow in real pore systems is addressed in our paper. The X–ray computed micro-tomography technique has been applied first to reconstruct in details a real pore space of a subcentimetric sample. Making use of dedicated software (ScanIP) the generated porous medium images has been processed to build a 3D pore space geometry. Finally, based ...

Modeling and Simulation of Hydrogen Storage Device for Fuel Cell Plant Using COMSOL Multiphysics

O. Akanji, and A. Kolesnikov
Department of Chemical & Metallurgical Engineering
Tshwane University of Technolgy
Pretoria, South Africa

In this work, a 2D dynamic simulation for a portion of metal hydride based hydrogen storage tank was performed using computational software COMSOL 4.0a Multiphysics. The software is used to simulate the diffusion and heating of hydrogen in both radial and axial directions. The model consists of a system of partial differential equations (PDE) describing two dimensional heat and mass transfer of ...

Modeling of a Switchable Permanent Magnet Magnetic Flux Actuator

I. Dirba, and J. Kleperis
Institute of Solid State Physics of University of Latvia
Riga, Latvia

A simple magnetic circuit consisting of ferromagnetic core material, air gap, permanent magnets and current coils can be used to form magnetic actuators, motors etc. devices. In this work the current coils are not used to generate working magnetic field, but just to switch magnetic flux created by permanent magnets in necessary direction. Analytical and numerical (Finite Element Model, COMSOL) ...

Analysis of a Three-phase Transformer Using COMSOL Multiphysics and a Virtual Reality Environment

A.Buchau, and W. M. Rucker
Institut für Theorie der Elektrotechnik
Universität Stuttgart
Stuttgart, Germany

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 ...

Current Distribution and Magnetic Fields in Complex Structures Using Comsol Multiphysics

S. F. Madsen, and C. Falkenstrøm Mieritz
Highvoltage.dk ApS
Lejre, Denmark

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 ...

Compression Driver Simulation Including Air Damping in Phase Plug

R.Christensen, and U. Skov
iCapture ApS
Gadstrup, Denmark

A compression driver is a certain type of electrodynamic loudspeaker which has a phase plug with slits in front of the diaphragm. The slits are narrow enough that the so-called viscothermal effects are of significant importance. In this paper a 2D axisymmetric finite element model of a commercial compression driver is established where the vibroacoustic behavior can be evaluated. The ...

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