Numerical Modelling Of Moisture Related Mechanical Stress In Wooden Cylindrical Objects Using COMSOL: A Comparative Benchmark
H. Schellen, and J. Van Schijndel
Eindhoven University of Technology, Eindhoven, The Netherlands
For preservation of artefacts in a museum the indoor climate is often restricted to a very narrow interval for temperature, but most of all for relative humidity. In old buildings the museum conditions of artefacts, e.g. near cold walls, mostly are not in line with museum recommendations.To have an impression of indoor museum climates in old buildings, a large number of case studies were carried ...
E. Barega, E. Zondervan, and A.B. De Haan
Eindhoven University of Technology, Dep. Chemistry and Chemical Engineering, Eindhoven, the Netherlands
The mixer-settler principle is commonly used for industrial extraction processes. This is done by mixing the two immiscible liquids to perform mass transfer and subsequently separating them in gravity settler. However, when drop size becomes small, separation in a settler becomes difficult and entrainment of valuable chemical occurs. Moreover, entrained impurities dilute the product. ...
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 ...
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 ...
J. Berthier, R. Renaudot, P. Dalle, G. Blanco-Gomez, F. Rivera, P. Caillat, and V. Agache
CEA-LETI, Grenoble, France
With the current trend towards always more complexity associated to more functionalities in biotechnological systems, it is required to know with accuracy the pressure drop in the circuitry of microfluidic systems. In general, a full three-dimensional calculation is not tractable due to the limited capacity of the computers. However, computational models can help to produce pressure drop ...
L. Santandrea, and Y. Le Bihan
Laboratoire de Génie Electrique de Paris, Gif-sur-Yvette, France
Eddy current testing (ECT) is widely used to check the integrity of electrically conducting parts and notably to detect flaws. It is based on the interaction between a probe and the part under testing. The finite element method (FEM) is well fitted to the modelling of these kinds of problems because of its large flexibility which allows to deal with complex probe and part configurations. In this ...
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 ...
B.A. Wols[1,2], J.A.M.H. Hofman[1,2], W.S.J. Uijttewaal, and J.C. van Dijk
KWR Watercycle Research Institute, Nieuwegein, The Netherlands
Delft University of Technology, Niewegein, The Netherlands
Disinfection of drinking water is required to prevent the outbreak of water-borne diseases. Different treatment steps are available to disinfect the water, such as chlorination, ozonation or UV irradiation. The hydrodynamics of these processes play an important role in their performance. COMSOL Multiphysics was used to simulate the water flow in disinfection installations. Moreover, a particle ...
I. Bogdanov, S. Jardel, A. Turki, and A. Kamp
Open & Experimental Centre for Heavy Oil, University of Pau, Pau, France
Pore-scale modeling of multiphase flow through porous media is addressed most frequently to improve our understanding of flow and transport phenomena in such settings. It can be used to obtain macro-scale constitutive equations, to assign multiphase flow properties in large scale models, to predict how these properties may vary with rock type, wettability, etc. The description of a physical ...