Malki, B., Baroux, B.
LTPCM/INPG Grenoble, France
Modelling of pit chemistry in applied polarization mode is carried out using finite element method techniques (FEM). The results lead to the formulation of critical conditions for pit stabilization in terms of pit geometry and applied potential. More detailed computing is performed to compare the stability behaviour of both ferritic AISI 430 and austenitic AISI 304 stainless steels. The ...
Computations on the coupled heat and mass transfer during fires in bulk materials, coal deposits and waste dumps
Krause, U., Schmidt, M., Lohrer, C.
Federal Institute for Materials Research and Testing (BAM), Division II.2 “Reactive Substances and systems”, Berlin, Germany
In porous combustible matter low-rate oxidation takes place at ambient conditions. In large stockpiles of bulk goods, coal heaps, waste dumps etc. it may occur that the heat released by the oxidation reaction is not fully transmitted to the surroundings but raises the temperature within the deposit. This triggers a positive feed-back loop since the oxidation rate increases with temperature. The ...
A multiphysics approach of the styrene free radical polymerization modeling performed in different microreactors
Serra, C., Sary, N., Schlatter, G.
LIPHT-CNRS UMR 7165, ECPM-ULP Strasbourg
This paper investigates the modeling of styrene free radical polymerization in two different types of microreactor for which the wall temperature is kept constant. The simulations are performed with the help of FEMLAB 3.1 to solve simultaneously partial differential equations resulting from the hydrodynamics, thermal and mass transfer (convection, diffusion and chemical reaction). The ...
Müller, F, Hietschold, M - Institut für Physik Analytik an Festkörperoberflächen (AFKO)
Oh, S., Sadleir, R.
Department of Biomedical Engineering, University of Florida
Electrical Impedance Tomography (EIT) is a method for forming cross-sectional maps of impedance in an object of interest from external four electrode measurements. EIT reconstruction techniques make assumptions about geometry of the conductor and the electrodes. As a consequence, EIT methods that seek to reconstruct absolute impedance have a high sensitivity to errors in assumed boundary shape, ...
Zeller, P.1, Rabl, M.2
1 FH-Wels, Studiengangsleiter Automatisierungstechnik
2 FH-Wels, Studiengangsleiter Innovations- und Produktmanagement
Moderne Überspannungsableiter bestehen aus einer halbleitenden Zinkoxidkeramik, die auf-grund ihrer nichtlinearen elektrischen Charakteristik ein spannungsbegrenzendes Verhalten zeigt. Aufgrund des negativen Temperaturkoeffizienten des Sperrstromes, kann es zu einem „thermischen Davonlaufen“ nach einem zu hohen Energieeintrag bei einem Ableitvorgang kommen. Die Belastbarkeitsgrenze muss ...
Mads Clausen Institute, University of Southern Denmark
As an important part of the smart/intelligent structures, the composite plate with piezoelectric-ceramics (PZT) patches embedded has numerous values in many engineering applications, such as: aerospace, automotive, civil and mechanical engineering. A composite thin plate excited by PZT actuators is considered in this work. To describe the dynamic response of the quadrate plate clamped at its ...
Tim Cale, Daniel Bentz, and Max Bloomfield, RPI
We discuss the use of 3D grain continuum modeling to study grain boundary migration driven by differences in strain energy density. COMSOL Multiphysics is used to compute stresses and strain energy densities in polycrystalline structures caused by temperature changes. We treat each grain as a single crystal, with the anisotropic elastic properties of single crystal Cu appropriately rotated to ...
G. Bonmassar, and A. Golby
AA. Martinos Center, Massachusetts General Hospital, Charlestown, Massachusetts, USA
Department of Neurosurgery, Brigham and Women’s Hospital, Boston, Massachusetts, USA
A new type of MRI compatible intracranial electrode based on Polymer Thick Film (PTF) is presented and studied using COMSOL Multiphysics. The geometry considered was a two-dimensional cross section cut of 5 mm thick electrodes with 5 cm leads on top of a 2×10 cm slab representing Gelfilm, or the substrate. The resistive leads were compared with metallic leads to estimate the ...
A Numerical Study for Rubber Particles Collection Involved in New Thermoforming Composite Process Using COMSOL Multiphysics®
R. Carbone, V. Antonelli, A. Langella, and R. Marissen
Material and Production Engineering Department, Università degli Studi di Napoli Federico II, Napoli, Italy
Institute of Lightweight Structures, Technische Universität München, München, Germany
Design and Production of Composite Structure, Delft University of Technology, Delft, The Netherlands
This paper deal of the forming process applied to the thermoplastic composites. A new thermoforming process that uses rubber particles collection as flexible mould was presented and numerically modeled. A characterization of the rubber in particles form was previously performed to value the material parameters in the user-defined hyperelastic constitutive laws employed in the FEM (Finite Element ...