A. Aman, R. Gentile, Y. Chen, X. Huang, Y. Xu, N. Orlovskaya
Department of Mechanical, Materials and Aerospace Engineering, University of Central Florida, Orlando, FL, USA
Department of Mechanical Engineering, University of South Carolina, Columbia, SC, USA
Solid oxide fuel cells (SOFCs) are electrochemical conversion devices that utilize ceramics as their electrolyte material for oxygen conduction. Compared to other types of fuel cells, they operate at relatively high temperatures, typically 400°C to 1000°C, and have an electrical efficiency over 50% and combined heat and power efficiency over 80%. One way to improve cell performance is to use ...
Department of Chemistry, University of Firenze, Sesto Fiorentino, FI, Italy
Microelectrodes demonstrate that modeling is crucial for understanding the behavior of complex electrochemical systems. The use of the finite element methods in electrochemistry may be of much more general interest for its ability to handle complex geometries. In this context a software such as COMSOL Multiphysics® allows a straightforward way to the set up models including coupling of ...
A. Oury ,
 SIMTEC, Grenoble, France
Numerical simulation can be advantageously employed to predict the main cell features (e.g., the reaction rate distribution on the electrodes, the cell voltage, or the electrolyte temperature) in order to optimize the design and operational conditions of the process. In this poster, we describe two complementary computational approaches applied to a molten salt electro-refiner for ...
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 ...
C. Taxén, and D. Persson
Swerea-Kimab, Stockholm, Sweden
Corrosion of metals in confined zones is a big industrial problem. The electrochemistry of such localized corrosion processes is complicated by the impact of the corrosion processes on the composition of the local solution. In the present problem, local interaction with the atmosphere causes uptake of O2 and CO2 and evaporation of water from the initially dilute NaCl-solution. This model ...
J. Bouhattate, X. Feaugas, and S. Frappart
Laboratoire d’Etudes des Matériaux en Milieux Agressifs,
Université de La Rochelle, La Rochelle, France
V&M France, CEV, Aulnoye-Aymeries, France
Hydrogen Embrittlement (HE) is one of the mechanisms responsible for premature failure of structures. In the context of environmental sustainability, it is compelling to improve or conceive new processes and/or new materials capable of reducing fracture induced by HE. We analyzed the influence of the oxide layer on the permeability of hydrogen. This investigation was carried on as a correlative ...
P. Ghods, K. Karadakis, O. B. Isgor, and G. McRae
Carleton University, Ottawa, Ontario, Canada
Corrosion of rebar in concrete is one of the most prominent durability problems in reinforced concrete, especially where de-icing or seawater salts come into contact with the structures. Previous electrochemical and microscopic investigations have shown that local crevices between the mill scale and the underlying steel surface accelerate the corrosion initiation of rebar in concrete. Steel ...
E. Ruiz-Reina , F. Carrique , A.V. Delgado , M.M. Fernández ,
 Department of Applied Physics II, University of Málaga, Málaga, Spain
 Department of Applied Physics I, University of Málaga, Málaga, Spain
 Department of Applied Physics, University of Granada, Granada, Spain
Capacitive energy extraction based on double layer expansion (CDLE) is a new method devised for extracting energy from the exchange of fresh and salty water in porous electrodes. First suggested by D. Brogioli, it is enclosed in a group of emergent technologies jointly known as Capmix methods. The CDLE technique is based on the fact that the capacitance of the electric double layer (EDL) ...
江智元 , 王琼 ,
引言 采用相变材料的汽车电池热管理技术已经被广泛研究，利用相变材料的相变潜热对电池进行温控，能有效降低电池高倍率工作条件下的电池温升，提高温度均匀性[1,2]。热管作为一种高导热，紧凑型，形式灵活的换热器件，也被用于电池热管理之中[3,4]。本文针对相变材料与热管相结合的换热结构，对该结构的换热特点，以及对影响该结构换热效果的相关参数进行了数值模拟研究。 COMSOL Multiphysics® 的使用 利用 COMSOL Multiphysics 中的电化学模块和传热模块，建立了二维的电池-热管-相变材料“三明治”结构（图1）。电池部分采用了热-电化学耦合的电池产热模型，热管采用了三层结构的烧结热管模型。 结果 对于耦合换热模块而言，热管冷端的散热情况和相变材料的厚度对模块的换热效果影响较大。如图2所示，电池的温度随着热管冷端换热系数的提高而下降，温度下降并非线性 ...
Three-Dimensional Percolation Properties Simulation of a Marine Coating Based on Its Real Structure Obtained from Ptychographic X-Ray Tomography - new
B. Chen, M. Guizar-Sicairos, G. Xiong, L. Shemilt, A. Diaz, J. Nutter, N. Burdet, S. Huo, F. Vergeer, A. Burgess, I. Robinson
London Centre for Nanotechnology, University College London, London, UK
Paul Scherrer Institute, Villigen, Switzerland
AkzoNobel Co. Ltd., Sassenheim, Netherlands
AkzoNobel (UK) Co. Ltd., Tyne and Wear, UK
We present quantitative nano-scale analysis of the 3D spatial structure of an anticorrosive aluminium epoxy barrier marine coating obtained by ptychographic X-ray computed tomography (PXCT) [1-3]. We then use COMSOL Multiphysics® software to perform simulations on the acquired real 3D structure to demonstrate how percolation through this actual 3D structure impedes ion diffusion in the ...