Ici vous trouverez les présentations issues des Conférences COMSOL à travers le monde. Réalisées par des utilisateurs de COMSOL Multiphysics, ces présentations explorent tous les domaines actuels d'innovation. Les applications couvrent pratiquement tous les secteurs industriels et impliquent des phénomènes électriques, mécaniques, fluidiques et chimiques. Utilisez la recherche rapide pour trouver les présentations les plus intéressantes dans votre domaine d'intérêt.

Impact of Electrode Surface/Volume Ratio on Li-ion Battery Performance - new

S. Das[1], J. Li[2], R. Hui[1]
[1]University of Kansas, Lawrence, KS, USA
[2]Kansas State University, Manhattan, KS, USA

The adoption of micro- and nanostructured electrodes is a promising technique to improve the performance of Li-ion battery, which increases the electrode surface area and improves the efficiency of ion exchange between the electrode and electrolyte. This performance improvement is supported by the results of our numerical simulation based of a Li+ battery in COMSOL Multiphysics® software. The ...

Mathematical Modeling of a Lithium Ion Battery

R. E. White[1], and Long Cai[2]
[1]R.E. White & Associates LLC, Columbia, South Carolina, USA
[2]Department of Chemical Engineering, University of South Carolina, Columbia, South Carolina, USA

The existing lithium ion battery model in COMSOL’s Multiphysics  software is extended to include the thermal effects. The thermal behavior of a lithium ion battery is studied during the galvanostatic discharge process with and without a pulse. The existing lithium ion battery model in COMSOL 3.5a is extended by adding an energy balance and the temperature dependence of properties of ...

Temperature Propagation during Cell Stacking Processes for Lithium-Ion Cells

G. Liebig [1], P. Bohn [2], L. Komsiyska [1], S. Vasić [1]
[1] NEXT ENERGY EWE-Forschungszentrum, Oldenburg, Germany
[2] AUDI AG, Ingolstadt, Germany

A thermo-physical 3D model of a commercial Li-ion battery was developed and validated. Visualization of the temperature distributions inside a Li-ion cell during cell stacking processes were simulated. Critical temperature levels depend on position, duration and intensity of the thermal stressing. Results show a maximum local temperature of 180 °C at the jelly roll after laser welding for 4 s ...

Modeling Galvanic Corrosion

E. Gutierrez-Miravete[1], M. Turner[2]
[1]Rensselaer at Hartford, Hartford, CT, USA
[2]General Dynamics-Electric Boat, Groton, CT, USA

Galvanic corrosion is encountered in marine applications because one often has dissimilar metal joints and seawater acts as an electrolyte. One metal acts predominantly as anode and undergoes material dissolution while the other acts predominantly as cathode and is the site where a cathodic reaction takes place. Assuming a stagnant electrolyte, the equation governing the distribution of ...

Simplified Multiphysics Model for All-Solid State Microbatteries

M.S. Nesro[1], I.M. Elfadel[1]
[1]Masdar Institute of Science and Technology, Masdar City, Abu Dhabi, UAE

Lithium microbatteries are replacing conventional power sources in many microsystems areas such as wireless sensors and biomedical monitors. In many of these applications, compact models of micro batteries are needed both at the microsystems design stage and at the real-time power management stage. These compact models are typically derived from physics-based discretized formulations. We have ...

Numerical Analysis of Propeller-induced Low-frequency Modulations in Underwater Electric Potential Signatures of Naval Vessels in the Context of Corrosion Protection Systems

D. Schaefer[1], J. Doose[2], A. Rennings[1], and D. Erni[1]
[1]General and Theoretical Electrical Engineering (ATE), Faculty of Engineering, University of Duisburg-Essen, Duisburg, Germany
[2]Technical Center for Ships and Naval Weapons (WTD 71), Bundeswehr, Eckernförde, Germany

Since October 2009 the laboratory of ATE has carried out collaborative research with the WTD 71 that aims for prediction, reduction and optimization of so-called underwater electric potential (UEP) signatures. COMSOL is used to simulate potential distributions in the context of impressed current cathodic protection (ICCP) systems. The electrode kinetics is considered by using boundary conditions ...

Primary Current Distribution Model for Electrochemical Etching of Silicon through a Circular Opening

A. Ivanov [1], U. Mescheder [1],
[1] Hochschule Furtwangen University, Furtwangen im Schwarzwald, Germany

Primary current distribution model for anodization of low-doped p-type silicon through a circular opening in frontside insulating mask is developed. The model is applied in two regimes of the process – pore formation and electropolishing – by definition of current density dependent functions of porosity and dissolution valence based on experimental results. As found also experimentally, ...

Comparison Between Turbulent and Laminar Bubbly-Flow for Modeling H2/H2O Separation

E. Amores Vera[1], J. Rodríguez Ruiz[1]
[1]Centro Nacional del Hidrógeno, Puertollano, Spain

One of the most critical aspects on water electrolysis is gas-liquid separation, especially in systems with forced convection. The main problem of this kind of circulation is that a gas fraction could return to the electrolysis circuit. A suitable design of separator devices could be a solution in order to avoid a gas return to the electrolysis circuit. In this sense, the use of deflectors might ...

Cooling and Hardening during Injection Molding of Field Joint Coatings for Deep Sea Pipelines

L. Van Lokeren [1], R. Verhelle [1], S. Loulidi [1], H. Boyd [2], G. Ridolfi [2], G. Van Assche [1]
[1] Vrije Universiteit Brussel, Brussels, Belgium
[2] Heerema Marine Contractors, Leiden, The Netherlands

A multilayer polymer coating is applied to carbon steel pipelines installed in the sea to protect against corrosion and to insulate to maintain the temperature. For field joint coatings, both thermosets (like polyurethane) and semi-crystalline thermoplastics (like polypropylene) are commonly used. To predict the temperature and crystallinity or conversion of the polymer during the cooling ...

Simulation of Production Processes using the Multiphysics Approach: The Electrochemical Machining Process

R. van Tijum
Advanced Technology Center, Philips Consumer Lifestyle, Drachten, The Netherlands

Redmer van Tijum studied Applied Physics at the University of Groningen. In 2006, he received his PhD title on ‘Interface and surface roughness of polymer metal laminates’ in the field of Material Science at the University of Groningen. After that he became research and development engineer at Philips, where he focussed his attention on the improvement of production processes mainly ...