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.

Modeling of Drops Spreading on Random Surfaces

J. Frassy1, C. Lecot2, M. Murariu3, C. Delattre1, and A. Soucemarianadin1
1Université Joseph Fourier, Grenoble, France
2Université de Savoie, Le Bourget-du-Lac, France
3LETI, CEA, Grenoble, France

We present simulations of drops spreading on random surfaces with either chemical or topographical heterogeneities. All the computations are made within the framework of the lubrication approximation. The droplet height is the solution of a time-dependent nonlinear fourth order partial differential equation, which is solved using COMSOL. Fast Fourier Transform (FFT) together with an appropriate ...

Coupled Electromagnetic, Thermal and Fluid Dynamics Simulation of Axial Flux PM Synchronous Machines

F. Marignetti
DAEIMI, Department of Automation, University of Cassino, Cassino, Italy

This paper investigates the Electromagnetic and thermal behavior of Synchronous Axial Flux Permanent Magnet Machines. The Axial Flux machine employed for tests and simulations has a Soft Magnetic Compound stator core. The electromagnetic analysis is used to assess electromechanical variables and machine parameters. Furthermore, the thermal source is obtained from a DC current flow model which is ...

A Material Model for Simulating Volume Changes during Phase Transformations

M. Tehler, and S. Jonsson
Materials Science and Engineering, Royal Institute of Technology, Stockholm, Sweden

The present work describes the first steps in creating a robust material model able to predict volume changes due to thermal expansion and phase transformations.A dilatometer test is simulated starting from room temperature, with an original microstructure constituting a mixture of ferrite and pearlite. During heating, the structure transforms to austenite, which upon quenching will transform ...

Modeling of Circulating Nuclear Fuels with COMSOL Multiphysics

A. Cammi, V. Di Marcello, and L. Luzzi
Politecnico di Milano, Department of Nuclear Engineering, Milan, Italy

This paper presents multiphysics modeling of a circulating nuclear fuel in a simple geometry by means of COMSOL Multiphysics.Among the Circulating Fuel Reactors (CFR), the most promising is the Molten Salt Reactor (MSR). Physics of such circulating nuclear fuel requires five coupled equations of conservation laws: the momentum balance, the energy balance, the neutron balance and the precursors ...

2D Magneto-Thermal Modeling of Coated High-Temperature Superconductors

F. Roy1, B. Dutoit1, F. Sirois2, and F. Grilli3
1École polytechnique fédérale de Lausanne, Lausanne, Switzerland
2Éole polytechnique de Montréal, Montréal, Canada
3F. Grilli, Los Alamos National Laboratory, Los Alamos, NM, USA

Thin films are very promising for the design of novel and an efficient Fault Current Limiter (FCL) made of high-temperature superconductors (HTS). However, before considering the use of these in a power grid, their thermal and highly non-linear electromagnetic behavior in the presence of over-critical currents needs to be investigated in detail.In this paper, we propose a numerical approach to ...

Implementation of Hysteresis Material Characteristics in Finite Element Computations

P. Sergeant, and L. Dupré
Department of Electrical Energy, Systems and Automation, Ghent University, Ghent, Belgium

The hysteresis loss in a sample is obtained by evaluating the drag force profile when slowly moving the sample forward and backward through the strong field of a permanent magnet.A numerical time-stepping model is presented that calculates the drag force profile. At every time step, the sample is slightly moved relative to the magnet. The model is based on 2D-FE computations (COMSOL AC/DC module, ...

Using COMSOL Multiphysics for the Modelling of a Hybrid Linear Stepper Motor

R. Wislati, and H. Haase,
Leibniz University of Hanover, Germany

In this paper a 2-phase hybrid linear stepper motor (HLSM), also known as Sawyer linear motor, has been considered as a potential approach in Variable Valve Actuation (VVA) Systems for Internal Combustion Engines. Initially, the reluctance network approach (RNA) with lumped parameters has been used assuming an infinite permeability of the steel core. The results have then been compared with a ...

Numerical Analysis of Fluid Mixing in a T-Shaped Micro Mixer

M. S. Virk, A. E. Holdø, and S. Kaennakham
Energy & Environmental Technology Applied Research Group, Faculty of Engineering and Computing, Coventry University, Coventry, UK

Microfluidic systems hold promise for many novel applications where rapid mixing is important, and has lead to a number of new developments. Despite such major developments, no systematic study has been carried out to understand the effect of flow mechanisms and geometry on microfluidic mixing. This work focuses on a mixing analysis of low Reynolds number (< 25) microfluids in a T-shaped passive ...

Numerical Simulation of the Filling Stage in the Polymer Injection Moulding Process

R. El Otmani1, M. Zinet1, M. Boutaous1, P. Chantrenne1, and H. Benhadid2
1CETHIL, Université Lyon, Villeurbanne, France
2Laboratoire de Mécanique des Fluides et d'Acoustique, Université Lyon, Ecully, France

During injection moulding of thermoplastic parts, high pressures, velocities and temperatures are experienced by the polymer in the filling phase. The numerical simulation of this phase is a complex task, especially for semi-crystalline polymers, because it involves a coupling between heat transfer, material structural transformation and crystallinity. The aim of this work is to present ...

Metal Surface Laser Texturing: Multiphysics Modeling of a Single Impact Effect

A. Soveja1,2, J. M. Jouvard1, and D. Grevey1
1Institut Carnot de Bourgogne, Bourgogne, France
2Faculté de Génie Mécanique, Université "Politehnica" Timisoara, Timisoara, Romania

During laser-matter interaction, a very small layer of molten material forms. The vapor plumes, formed by material vaporization, exercise an overpressure on the molten material. In a previous work, a 1D thermal model was carried out, but this model did not account for all physical phenomena during laser-matter interaction. For that, it is necessary to couple the thermal equations, the fluids ...

Quick Search