F. Ferrero, M. Kluge, R. Zeps, T. Spoormaker
BAM Federal Institute for Materials Research and Testing, Berlin, Germany
Chairman PlasticsEurope Fluoropolymers TFE Safety Task Force, Du Pont De Nemours, Dordrecht, The Netherlands
The self-ignition of tetrafluoroethylene (TFE) caused by contact with hot surfaces has been analyzed with the help of simulations performed with COMSOL Multiphysics®. The current study focuses on large-scale heated reactors for the industrial production of polytetrafluoroethylene (PTFE) from TFE at high pressures. Simulations of the self-heating and consequent self-ignition of TFE in a 100-dm3 ...
A. Oukaira , A. Lakhssassi ,
 Department of Computer Science, Université du Québec en Outaouais à Hull, Gatineau, QC, Canada
The Purpose of this paper is to develop a thermal model using COMSOL Multiphysics® software that aims to get an idea of the heat flow around the ASIC, as well as to address the thermal issues for integrated circuits at the tongue board. However, we need sources of heat simulations to map the tab to establish its thermal mapping. This led us to perform simulations at each ASIC of the tab that ...
J. Zhang, Y. Mizuyama, W. Xiong, Y. Zhou , and Y. Lu
Panasonic Boston Laboratory, Newton, MA, USA
University of Nebraska, Lincoln, NE, USA
Simulation of laser pulse-train (25ns, 60 kHz and 3000 pulses) heating Sol-Gel thin film using COMSOL Multiphysics software is investigated. The results show two kinds of temperatures formed on film surface by laser pulse-train heating. One is a single pulse induced transient peak-temperature, which is up to ~1635oC on both Si and glass substrates. The other is the accumulated ...
S. Khushrushahi, A. Weddemann, Y. Kim, and M. Zahn
Massachusetts Institute of Technology
Prior work has analyzed the case of planar Poiseuille ferrofluid flows in planar ducts stressed by uniform sinusoidally applied fields transverse and perpendicular to the duct axis. The coupled linear and angular momentum conservation equations with imposed magnetic flux density, Bx and magnetic field Hz result in a fourth-order system that was numerically solved using the shooting method in ...
A. Malachowska, L. Pawlowski , A. Ambroziak , M. Winnicki , P. Sokolowski
University of Limoges, Limoges, France
Wroclaw University of Technology, Wroclaw, Poland
This paper studies oxide forming on titanium, during cold gas dynamic spraying with air. This is a quite new spraying method, which can be used to spray material having high affinity for oxygen. The model allows for the diffusion of oxygen through the oxide layer, reaction on the oxide-titanium interface and expansion of oxide, due to difference in molar density. It was implemented in COMSOL ...
G. Perillo, G. De Natale, M.G. Di Giuseppe, A. Troiano, C. Troise
University of Naples Parthenope, Italy
INGV - Osservatorio Vesuviano, Naples, Italy
Fluid injection in deep wells is a basic procedure in geothermal permeability enhancement. The retrieved changes of Pressure and Temperature are subsequently considered as sources of incremental stress and strain changes, using the elastic model from COMSOL Multiphysics®, which are then converted to Coulomb stress changes on favoured faults, taking into account also the background regional ...
Fluid-Structure Interaction Modeling for an Optimized Design of a Piezoelectric Energy Harvesting MEMS Generator
I. Kuehne, A. van der Linden, J. Seidel, M. Schreiter, L. Fromme, and A. Frey
Siemens AG, Corporate Research & Technologies, Munich, Germany
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 ...
S. Loire, and P. Kauffmann
University of California
Santa Barbara, CA
Recently, electrokinetic flows have raised the interest of the scientific community. Driving flow with an electric field leads to promising applications for mixing, concentration, pumping application in lab on chips. However, current models are still inaccurate and don\'t fit the measures. The simple decoupled model developed by Ramos et al does not predict velocities for all parameters. ...
Hydro-Mechanical Modelling of Infiltration Test for a Bentonite-Sand Mixture: Model Verification and Parameter Identification
M. Hasal, R. Hrtus, Z. Michalec, R. Blaheta
Institute of Geonics AS CR, Ostrava, Czech Republic
The first aim of our work is to create a hydro-mechanical model (HM) of unsaturated fluid flow in bentonite-sand mixture (BSM) MX-80. The second aim is to validate and calibrate the developed model by using the data from a laboratory infiltration test of BSM. The used multi-physics model combines Richards type unsaturated flow with diffusive vapour flow and (nonlinear) elastic response of the ...
Z. S. Gul, N. Xiang, M. Caliskan
Department of Architecture, Middle East Technical University, Ankara, Turkey
School of Architecture, Rensselaer Polytechnic Institute, Troy, NY, USA
Department of Mechanical Engineering, Middle East Technical University, Ankara, Turkey
Sound energy distribution patterns within enclosed spaces are the basic concerns of architectural acoustics. Energy decays are analyzed for major acoustical parameter estimations, while spatial energy distribution and flow vectors are indicative in the analysis of sound energy circulation and concentration zones. In this study the acoustical field of a real-size multi-domed monumental ...