S. Francois, and P. Namy
Nexans Research Center, Lyon cedex, France
SIMTEC, Grenoble, France
Power over Ethernet (PoE/PoE+) is a technology allowing to transmit data and power over the same data cable. The major concern for this technology is the degradation of data transmission performances due to the temperature increase in the cable. To have a better quantitative and qualitative knowledge of the temperature field in the cables, Nexans has developed a 2D finite element thermal model ...
Finite Element Modeling of Coupled Heat and Mass Transfer of a Single Maize Kernel Based on Water Potential Using COMSOL Multiphysics Simulation
A.J. Kovács, E. Lakatos, G. Milics, and M. Neményi
University of West Hungary, Institute of Biosystems Engineering, Mosonmagyarovar, Hungary
Finite element modeling of agricultural materials is very often used for describing physical processes. However, exact physical measurements are needed as input parameters for the models. Knowing the driving forces (potentials) during heat and mass transfers is necessary for an accurate model. Water potential gradients as the driving force are used in contrast with the conventional practice ...
J.F. Dannenberg, J. Brinkert, and E.A.D. Lamers
Reden b.v., Hengelo (ov.), The Netherlands
One of the upcoming technologies in displays is that of the electrowetting displays. A surface can be covered by a colored oil or transparent water using a voltage to increase or decrease the wettability of the surface. A simulation of the behavior of such a thin film of oil in water, forced to move due an electrostatic field, has been made using the level-set, two-phase flow application mode ...
Riello Burners, Italy
This work talks on simulation of a ventilating structure for an industrial burner. The mathematical model is based on the frozen-rotor technique, and the numerical simulation is used for resolution of fluid dynamics equations for the air flow into the rotating wheel and into the static volute of the fan. The numerical results obtained with COMSOL’s CFD module are compared with experimental data ...
S. Oukach, M. Elganaoui, B. Pateyron, and H. Hamdi
Laboratoire des Sciences des Procèdes Céramiques et de Traitements de Surface SPCTS, Limoges, France
Laboratoire de Mécanique des Fluides et Energétique LMFE, Marrakech, Morocco
The quality of coatings obtained by means of thermal spraying depends strongly on the mechanism of the interaction between the molten droplets and the surface to be covered. The aim of the present study is to simulate the impact of a droplet onto a substrate, in order to have a good understanding of the dynamics of droplets impact. In this study, the process of droplet spreading is described; the ...
M. Beckmann-Kluge, F. Ferrero, V. Schröder, A. Acikalin, and J. Steinbach
Federal Institute for Materials Research and Testing, Technical University, Berlin, Germany
Tetrafluoroethylene (TFE) is a gas widely employed in industry, which can under specific circumstances experience an exothermic dimerization to octafluorocyclobutane. If the heat generated by this reaction cannot be dissipated to the surroundings, the temperature inside the reactor will continue rising, leading to conditions where TFE can decompose in tetrafluoromethane and carbon black. This ...
S. Audière[1,2], M. Charbit, E. Angelini, V. Miette, J. Oudry, and L. Sandrin
Institut Telecom, Telecom ParisTech, Paris, France
Echosens, Paris, France
The Fibroscan® (Echosens, Paris, France) device based on vibration–controlled transient elastography (VCTE) is used to non– invasively assess liver stiffness correlated to the hepatic fibrosis. Stiffness is quantified by measuring the velocity of a low–frequency shear wave traveling through the liver, which is proportional to the Young’s modulus E. It has been demonstrated that E is ...
A. Coll, V. Di Virgilio, S. Bermejo, and L. Castañer
Universitat Politècnica de Catalunya, Barcelona, Spain
Photonic crystals are widely used in optical applications as waveguides and band filters. Filling the periodic structural material of photonic crystals with other materials is very useful in order to change the optical properties of the devices. In this paper electrostatic COMSOL simulations describing an electrospray deposition of particles in macroporous structures are performed.
Modelling the Effects of Temperature and Moisture Ingress on Capacitance and Dissipation Factor Measurements within Oil Impregnated Paper Transformer Bushings
D. Smith, S.G. McMeekin, B.G. Stewart, and P.A. Wallace
Glasgow Caledonian University, Glasgow, Scotland, United Kingdom
The majority of power transformer high voltage bushings today are of the condenser oil impregnated paper (OIP) type. The ingress of moisture, through the deterioration of the bushing over time, can result in a significant reduction in life and is a major failure mode of these bushings. Currently, the measurement of capacitance and dissipation factor is the most common method used to assess the ...
AGH University of Science and Technology, Kraków, Poland
This elaboration presents the Active Magnetic Suspension (AMS) and radial Active Magnetic Bearing (AMB) as a representative of the Active Magnetic Levitation Systems (AMLS). The laboratory test rigs are analyzed in the 2D space. The control algorithm as well as the motion dynamics are implemented directly in COMSOL Multiphysics. The discussion on features and limitations is provided to show an ...