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Showing results 1 - 20 of 68

Material Science

	2D Axial-Symmetric Model For Fluid Flow And Heat Transfer In The Melting And Resolidification Of A Vertical Cylinder Laser direct deposition is a process, different from molding or machining, which allows the producing of fully densified and operational components. This technique involves injecting metal powder through a coaxial nozzle into a melt pool... COMSOL Conference 2010, Paris S. Morville¹ , M. Carin¹ , M. Muller² , M. Gharbi² , P. Peyre² , D. Carron¹ , P. Le Masson¹ , and R. Fabro² ¹ Laboratoire LIMATB, Université de Bretagne Sud, Lorient , France ² Laboratoire PIMM, Arts et Métiers ParisTech, Paris, France
	3D Modeling of a Surface-Acoustic-Wave (SAW) Based Sensor In this study, the effect of adding nanostructures to the sensitive layer and changing the layer’s material property on the characteristics of SAW propagation is investigated under two types of wave perturbation: an impulse wave... COMSOL Conference 2007, Boston Y. Rao¹, and G. Zhang^1,2 ¹Micro/Nano Bioengineering Laboratory, Athens, GA, USA ²Nanoscale Science and Engineering Center, Faculty of Engineering, The University of Georgia, Athens, GA, USA
	3D Simulation of Doping Fluctuation Effects in Trigate FETs In this paper, we investigate random doping fluctuation effects in Trigate SOI MOSFETs by solving the 3D Poisson, Drift-diffusion and Continuity equations numerically.The presence of a single doping impurity atom induces a threshold... COMSOL Conference 2007, Grenoble R. Yan¹, D. Lynch², T. Cayron³, D. Lederer¹, A. Afzalian¹, C. W. Lee¹, and J. P. Colinge¹ ¹Tyndall National Institute, Lee Maltings, Prospect Row, Cork, Ireland ²University College Cork, Cork, Ireland ³Institut National Polytechnique, Grenoble, France
	3D Thermal-Diffusion Analysis on a Moisture Loaded Epoxy Sample COMSOL Multiphysics was used to simulate an experiment in which the hygroscopic swelling in an epoxy material was measured along a temperature ramp. A simultaneous solution was sought for temperature and moisture concentration... COMSOL Conference 2010, Boston B.G. Sammakia, S. Madduri, and W. Infantolino Binghamton University, Binghamton, NY, USA
	A Consistent Environment for the Numerical Prediction of the Properties of Composite Materials The current paper focuses on the creation of a consistent environment for the numerical prediction of the physical properties of polymer composite. A limitation factor for the successful simulation of composite processes is the correct... COMSOL Conference 2009, Milan J. Schumacher¹ , P. Fideu² , G. Ziegmann¹ , and A. Herrmann³ ¹ TU Clausthal-Institute of Polymere Materials and Plastic Engineering, Clausthal-Zellerfeld, Germany ² CTC GmbH Stade, Stade, Germany ³ Faserinstitut Bremen e.V., Bremen, Germany
	A Finite Element Analysis of the Influence of Morphology on Barrier Properties of Polymer-Clay Nanocomposites Nanocomposites, formed by dispersing a few weight-percent of nanometer-thick platelets of organically-coated montmorillonite clay in a variety of polymers, are being used in food packaging applications. The clay platelets reduce the... COMSOL Conference 2007, Boston D. L. Statler Jr., and R. K. Gupta Department of Chemical Engineering, West Virginia University, Morgantown, WV, USA
	A Material Model for Simulating Volume Changes during Phase Transformations 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... COMSOL Conference 2007, Grenoble M. Tehler, and S. Jonsson Materials Science and Engineering, Royal Institute of Technology, Stockholm, Sweden
	Analysis of Electrical Phenomena Occurring in Thermally Assisted Mechanical Dewatering Processes The so-called opposite electrode pair measurement strategy is adapted in a filtration/expression cell filled with a model material packed bed. In this paper, we investigate the electrical properties of a packed bed, with particular... COMSOL Conference 2006, Paris A. Mahmoud, A. Fernandez, and P. Arlabosse Ecole des Mines d’Albi Carmaux, Albi
	Application of Multiphysics in the Simulation of Metallurgical Processes In the steelmaking processes, the stirring of the metal bath by argon (or nitrogen) injection is a widely used method to achieve chemical or thermal homogeneity. Computational fluid dynamics can be used as a very powerful tool to gain an... COMSOL Conference 2010, Paris M. Ek, and D. Sichen Materials Science and Engineering, Royal Institute of Technology, Stockholm, Sweden
	Applying Grain Continuum Models to Stress Induced Grain Evolution in Next Generation Integrated Circuit Interconnects 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... COMSOL Conference 2006, Boston D.N. Bentz, M. Bloomfield, J-Q. Lu, R.J. Gutmann, and T.S. Cale Focus Center—New York, Rensselaer: Interconnects for Hyperintegration
	A Time Dependent Dielectric Breakdown (TDDB) Model for Field Accelerated Low-K Breakdown Due To Copper Ions We have simulated the copper ion concentration and internal electric field profiles in a dielectric material by solving the transient continuity/Poisson equations using COMSOL Multiphysics. We have shown that failure of dielectrics can be... COMSOL Conference 2008, Boston R. Achanta, J. Plawsky, and W. Gill Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute, Troy, NY, USA
	Chip Drop After Silver Sintering Process Since a couple of years, sintering becomes more and more important for power electronics. To press a semiconductor under high temperature in silver paste on a substrate promises benefits for durability. Tests with semiconductors of... COMSOL Conference 2009, Milan M.H. Poech¹ , M. Weiß¹ , and K. Gruber¹ ¹ Fraunhofer Institute for Silicon Technology, Itzehoe, Germany
	Compressional Waves Generation in Droplets of Water Deposited on a Quartz Crystal In this paper, we investigate the compressional wave generation in droplets and use different techniques to correlate the compressional wave generation to the shape of the droplets. Results show a good correlation between eigenmodes... COMSOL Conference 2006, Paris G. Couturier, R. Boisgard, C. Jai, and J.P. Aimé Université Bordeaux
	COMSOL-Based Numerical Analysis of The Electric Field Distribution During Electrospinning and Piezo-response Imaging of Ultra-Fine Lead Zirconate Titanate Fibers In this paper, we present our results on synthesizing micro and nanoscopic lead zirconate titanate (PZT) fibers using electrospinning. Furthermore, the PZT fibers have been characterized using the piezo-response imaging (PRI) technique... COMSOL Conference 2007, Boston Y. Wang and J. Santiago-Avilés Department of Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, PA, USA
	Control of Rolling Direction for Released Strained Wrinkled Nanomembrane Strained wrinkled and flat nanomembranes have different bending properties when they are released from the underlying substrate. This is caused by increased bending rigidity of the wrinkled film in one direction. We provide theoretical... COMSOL Conference 2009, Milan P. Cendula¹ , S. Kiravittaya¹ , J. Gabel¹ , and O.G. Schmidt¹ ¹ Institute for Integrative Nanosciences, Dresden, Germany
	Coupled Mechanical/Piezoelectric/Quantum Simulation of Strained Semiconductor InAs Quantum Dots (QD) Emitting at Long Wavelength The eight-band k.p model of strained zincblende crystals has been extensively used to describe the electronic structure of III-V semiconductor nanostructures.in the present work, we propose to extend these approaches in order to provide a... COMSOL Conference 2007, Grenoble J. Even¹, F. Doré¹, C. Cornet¹, L. Pedesseau¹, A. Schliwa², and D. Bimberg² ¹FOTON/INSA, CNRS, Rennes, France ²Institut für Festkörperphysik, Technische Universität Berlin, Berlin, Germany
	Crystallization Kinetics of Semi-Crystalline Polymers During Cooling Thermoplastic polymers are frequently used in several industries, and represent the most important group of polymeric materials. During the injection moulding process, the cooling phase including solidification is often the most... COMSOL Conference 2006, Paris N. Brahmia¹ , P. Bourgin¹ , M. Boutaous¹ , and D. Garcia² ¹ Laboratoire de Recherche Pluridisciplinaire en Plasturgie ² Pôle Européen de Plasturgie Belignat
	Dependence of Potential and Ion Distribution on Electrokinetic Radius in Infinite and Finite-length Nano-channels A site-binding/dissociation model is used to determine surface charge in numerical studies of the equilibrium potential and ion distributions inside infinite and finite-length nano-channels. This COMSOL model allows us to investigate the... COMSOL Conference 2008, Boston J. Schiffbauer¹ , J. Fernandez² , W. Booth¹ , K. Kelly³ , A. Timperman³ , and B. Edwards¹ ¹ Physics Dept. West Virginia University, Morgantown, WV, USA ² Chemical Engineering Dept,West Virginia University, Morgantown, WV, USA ³ Dept. of Chemistry, West Virginia University, Morgantown, WV, USA
	Electrostatic Screening Effects between Vertically Aligned Carbon Nanotubes and Fast Transient Joule Heating during Field Emission To minimize the erosion of arc electrodes, surface melting must be avoided by optimizing field emission. This can be achieved through the use of sharp structures in the design of the surface topography.Carbon nanotubes standing vertically... COMSOL Conference 2007, Boston M. Dionne, J.-L. Meunier, and S. Coulombe Department of Chemical Engineering, McGill University, Montreal, QC, Canada.
	Energy Exchange During Electron Emission from Carbon Nanotubes: Considerations on Tip Cooling Effect and Destruction of the Emitter Murphy and Good general theory for electron emission from metal surfaces was used to predict the field-emission capabilities of ideal arrays of vertically aligned carbon nanotubes (VACNT). The Nottingham effect was taken into account in... COMSOL Conference 2008, Boston M. Dionne, S. Coulombe, and J. Meunier Department of Chemical Engineering, McGill University, Montreal, Quebec, Canada

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Material Science