M. Qin, and H. Bau
Department of Mechanical Engineering and Applied Mechanics, University of Pennsylvania, Pennsylvania, USA
The paper presents and compares two models for simulating magneto-hydrodynamic flow of RedOx electrolyte in a conduit patterned with circular pillars. The first model solves the coupled Nernst-Planck and Navier-Stokes equations subjected to Butler-Volmer electrode kinetics and provides detailed information on ions’ concentrations. The second model treats the electrolyte as a conductor, and ...
Topology Optimization of Lithium-Ion Battery Electrode Microstructure Morphology for Reduction of Damage Accumulation and Longevity of Battery Life - new
P. Clarke, R. Abedi
University of Tennessee Space Institute, Tullahoma, TN, USA
The ubiquitous commercial use of Lithium-Ion batteries (LIBs) has increased interest in their implementation into efficient energy storage systems for clean and renewable power sources and the electrical transportation industry. Unfortunately, LIBs are not yet technological mature to meet various commercial demands. Consider the following challenges for example,: (1) lower than desired effective ...
P. Pianko-Oprych, E. Kasilova, Z. Jaworski
West Pomeranian University of Technology, Faculty of Chemical Technology and Engineering, Szczecin, Poland
Micro-tubular Solid Oxide Fuel Cells (mSOFC) are attracting more and more interest as new generation of energy conversion devices. Although commercial applications still suffer from high costs, there is a need for further improvement of the cell performance, durability and start-up. To resolve those challenges, knowledge of the distributions of species concentration, temperature and current ...
M. Hackert, G. Meichsner, and A. Schubert
Chair Micromanufacturing Technology, Faculty of Mechanical Engineering, Chemnitz University of Technology, Chemnitz, Germany
Fraunhofer Institute for Machine Tools and Forming Technology, Chemnitz, Germany
Jet Electrochemical Machining (Jet-ECM) is an unconventional procedure using localized anodic dissolution for micromachining. An increasing of the electrolyte temperature will lead to an increase of the electrical conductivity of the electrolyte by about 30% and to a reduction of the dynamic viscosity of the electrolyte by about 25 %. Both will improve the process. Therefore a Jet-ECM tool ...
A. E. Khabbazi, A.J. Richards, and M. Hoorfar
School of Engineering, UBC Okanagan, Kelowna, BC Canada, Canada
Using COMSOL Multiphysics 3.5, a numerical model has been developed to determine the effect of the channel geometry and electrode configuration on cell performance based on polarization curves. The Butler-Volmer equation was implemented to determine the reaction rates at the electrodes. The Conductive Media DC module is used to model the electric fields within the fuel cell.
C. Trenado, D. Strauss[1,2], and M. Wittmar
Computational Diagnostics & Biocybernetics Unit, Saarland University Hospital, Homburg, Germany
Leibniz-Institute for New Materials, Saarbrücken, Germany
Progress in coating technology has allowed for the development of free-chromate corrosion inhibitors, which are able to smartly migrate when required. In order to support the coating design, we propose a hybrid mathematical model to study the inhibitor's release by taking into account the thermodynamics and kinetics involved in the corrosion process. The proposed model is ...
I. Sgura, F. Zarcone, and B. Bozzini
Dipartimento di Matematica, Università del Salento, Lecce, Italy
Brindisi Fuel Cell Durability Laboratory, Facoltà di Ingegneria Industriale, Università del Salento, Brindisi, Italy
Corrosion and contact ohmic resistance of the stainless steel current collectors in molten carbonates is one of the greatest obstacles to widespread application of molten carbonate fuel cells (MCFC). We simulate the variation of material parameters values, accounting for the impact of corrosion of the metallic current collectors on the performance of the porous cathode. Furthermore, we couple a ...
Modeling a Non-Flooding Hybrid Polymer Electrolyte Fuel Cell and Related Diffusion-Migration-Reaction Systems
B.E. McNealy, J.L. Hertz
University of Delaware, Newark, DE, USA
Introduction: Understanding the mass and charge transport behavior of heterogeneous systems that include diffusion, migration, and reaction of ions is important in fuel cells, batteries, and other electrochemical applications. Here, a numerical model for charged species transport and reaction has been developed to simulate the electrochemical behavior of a novel type of “non-flooding” hybrid ...
A. Häffelin, J. Joos, M. Ender, A. Weber, and E. Ivers-Tiffée
Institut für Werkstoffe der Elektrotechnik (IWE)
Karlsruher Institut für Technologie (KIT)
A fuel cell is an electrochemical system, which converts chemical energy into electricity by a controlled reaction of hydrogen and oxygen. The performance of the electrode is likewise determined by its material and the microstructure. The simulations were performed directly on reconstructions of real electrodes, obtained from focused ion beam (FIB) tomography. A finite element method (FEM) ...
D. Mizuno, Y. Shi, and R. Kelly
University of Virginia
Aluminum alloys 5000 series are widely used within the cabins of ships. These aluminum alloys are often joined via steel bolts. There is thus a concern that galvanic interactions will exacerbate corrosion of the aluminum alloys. In this study, a model of the galvanic corrosion between aluminum alloy AA5083 and steel under atmospheric conditions was built. The Nernst-Plank equation and the ...