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Ferromagnetic Materials for MEMS- and NEMS-Devices

A. Weddemann, J. Jadidian, S. Khushrushahi, Y. Kim, and M. Zahn
Research Laboratory of Electronics
Massachusetts Institute of Technology
Cambridge MA

The modeling of ferromagnetic materials is a challenging task of high industrial and academic impact. Thin film and granular systems form the basis of novel spintronic devices such as modern hard drives with a high data area storage density. In order to push the current limits even further and to design more efficient devices, a strong understanding of the governing dynamics is required. We ...

Statistical Sensitivity Analysis of Li-ion Pouch Battery Cell Dimension and Design

A. Samba[1], N. Omar[2], H. Gualous[3], Y. Firouz[2], O. Capron[2], M. Abdel MonemO[2], J. Smekens[2], P. Van den Bossche[2], J. Van Mierlo[2]
[1]VUB ETEC, Brussel, Belgium and UCBN, LUSAC, Cherbourg, France
[2]VUB ETEC, Brussel, Belgium
[3]UCBN, LUSAC, Cherbourg, France

Multi-Scale and Multi-Dimensional (MSMD) modeling approaches have been proposed to simulate the thermal, electrical distributions and concentration behaviors of large size pouch cell. This approach is based on coupling of the energy balance with the Newman’s electrode model. Newman’s 1D electrochemical model is often used for small size batteries but not sufficient enough for large size where ...

Modeling and Simulation of Membrane Contactor Employed to Strip CO2 from Rich Solvents via COMSOL Multiphysics® - new

N. Ghasem[1], M. Al-Marzouqi[1], N. A. Rahim[1]
[1]United Arab Emirates University, Al-Ain, United Arab Emirates

A mathematical model is developed for the stripping of CO2 from rich solvent. The rich solvent (aqueous NaOH) is used in CO2 absorption from natural gas through gas-liquid hollow fiber membrane contactor. The polyvinylidene fluoride (PVDF) hollow fiber membrane was fabricated via thermally induced phase separation techniques. COMSOL Multiphysics software package is used in solving the set of ...

Electrowetting and Droplet Transport in Digital Microfluidic Chips for Mixing Applications

S. F. Azam[1]
[1]IIT Hyderabad, Hyderabad, Telangana, India

Over the last decade, electrowetting-on-dielectric (EWOD) has become one of the most blistering and versatile tool in digital microfluidics. It enables control over fluid shape and flow by electrical signals alone, which is viable by effective utilization of the excess charge accumulation at the interface between the droplet and the dielectric surface, also by polarization of line tension at the ...

Void Shape Evolution of Silicon: Level-Set Approach - new

C. Grau Turuelo[1], C. Breitkopf[1]
[1]Technische Universität Dresden, Dresden, Germany

The void shape evolution of silicon is a process driven mainly by surface diffusion which leads to a geometrical transformation of trenches etched in silicon wafers due to surface energy minimization. The temperature, the ambient gas and the annealing time affect the velocity of the process. The use of custom PDEs in COMSOL Multiphysics® software and the Level-Set method provide a good base ...

Influence of a Refurbishing on an Old Residential Building’s Wall in Paris in Summer: Mass and Heat Transfer Approach - new

K. Azos-Diaz[1], B. Tremeac[2], F. Simon[2], D. Corgier[2], C. Marvillet[1]
[1]Laboratoire de Chimie Moléculaire, Génie des Procédés Chimique et Energétique, Paris, France
[2]MANASLU Ing., Savoie Technolac, Le Bourget du Lac, France

The implementation of thermal insulation in old residential building walls could compromise the hygrothermal behavior of the construction, especially in summer time when it is placed inside. A bad installation of insulation could have consequences on the quality of indoor air conditions and on the health of the wall mostly during hot periods. Thus, the evaluation of heat and mass transfer ...

Modeling of a DBD Reactor for the Treatment of VOC

L. Braci[1], S. Ognier[1], and S. Cavadias[1]
[1]Laboratoire de Génie des Procédés Plasmas et Traitements de Surfaces, Ecole Nationale Supérieure de Chimie de Paris, University Pierre et Marie Curie, Paris, France

Non-thermal plasma, generated in atmospheric pressure discharges, has been investigated in our laboratory in order to treat highly diluted (300 ppm to 1000 ppm) volatile pollutant. The collision of electrons created in the discharge with atmospheric air, leads to the formation of reactive species that can totally or partially oxidize the pollutants at near ambient temperature. The purpose of the ...

Modelling Reservoir Stimulation in Enhanced Geothermal Systems

G. Perillo[1], G. De Natale[2], M.G. Di Giuseppe[2], A. Troiano[2], C. Troise[2]
[1]University of Naples Parthenope, Italy
[2]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 ...

Influence of Electrode Kinetics on Lithium-ion Battery Characteristics

H. Machrafi[1,2], S. Cavadias[2]
[1]University of Liège, Thermodynamics of Irreversible Phenomena, Liège, Belgium
[2]University Pierre et Marie Curie, Laboratoire des Procédés Plasma et Traitement de Surface, Paris, France

The purpose of this work is to show whether an important difference in Lithium solid concentration and electrolyte concentration can be observed in a Lithium-ion battery model, when considering either the Butler-Volmer kinetics or the Tafel kinetics for describing the electrode kinetics (including a boundary layer between the electrolyte and the electrode particles). During discharge, the ...

Microwave Heating Simulation of Frozen Pie - new

F. Chen[1], T. Gulati[1], H. Zhu[1], A. K. Datta[1]
[1]Cornell University, Ithaca, NY, USA

This research studies the thermal effect of frozen pie heating in the microwave oven. Considering as composite material, the properties of pie derived based on its composition. Here the package, susceptor’s influence to the temperature distribution is also studied.