Here you will find presentations given at COMSOL Conferences around the globe. The presentations explore the innovative research and products designed by your peers using COMSOL Multiphysics. Research topics span a wide array of industries and application areas, including the electrical, mechanical, fluid, and chemical disciplines. Use the Quick Search to find presentations pertaining to your application area.
COMSOL-News-Magazine-2017
COMSOL-News-Magazine-2017-Special-edition-acoustics
COMSOL-News-Magazine-2016

X80管线钢焊接接头局部腐蚀的数值模拟

朱国利 [1], 李亚东 [1], 李焰 [1],
[1] 中国石油大学(华东),青岛,中国

管道输送是油气能源长距离输送的重要途径。目前管道连接多采用焊接完成,焊接是一个复杂的非平衡物理化学过程,焊接接头各组成部分的成分、组织和性能都存在差异,同时还容易产生裂纹、气孔、夹杂和未熔合等焊接缺陷和较大的残余应力,使得焊接接头成为管道工程中的薄弱环节。在服役介质中,焊接接头存在宏观腐蚀电池与微观腐蚀电池耦合的多相电化学反应而引起局部腐蚀,可能导致整个构件失效,引发严重的安全事故,造成重大的经济损失甚至人身伤亡。利用 COMSOL Multiphysics® 多物理场仿真软件的腐蚀模块和二次电流分布接口对 X80 钢焊接接头在 CO2 饱和的 NACE 溶液中的电流密度及电位分布进行了仿真,并利用参数化扫描功能,模拟了焊缝与母材不同比例条件下的腐蚀行为。(图1)、(图2)、(图3)和(图4)分别为焊缝:母材=1:3和1:8条件下焊接接头在 NACE 溶液中的电流密度和电位分布 ...

Hybrid Multiscale Modeling of Corrosion Nanoinhibitors Transport

C. Trenado[1], D. Strauss[1,2], and M. Wittmar[2]
[1]Computational Diagnostics & Biocybernetics Unit, Saarland University Hospital, Homburg, Germany
[2]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 ...

Numerical Modelling of Electrophoresis Applied to Restoration of Archaeological Organic Materials

J. Caire[1], A. Bouh[1], and E. Guilminot[2]
[1]LEPMI, UMR 5631, INPG - CNRS, Saint Martin d’Hères, France
[2]EPCC, Arc'Antique, Nantes, France

Restoration of archaeological materials from oceans is a major activity of Arc’ Antique. Organic materials such as wood, tissues, leathers, papers and ceramics found in sea water are always impregnated with salts. Rinsing such archaeological objects with pure water to extract the salts takes too long, so electrophoresis was used to improve the salt extraction. The objective of this ...

Towards a Microscopic Model for Species Transport in Lithium-Sulphur Cells

Geraint Minton [1], Rajlakshmi Purkayastha [1], Laura O’Neill [1], Sylwia Walus [1], Mark Wild [1], Monica Marinescu [2], Teng Zhang [2], Gregory Offer [2],
[1] Oxis Energy Ltd, Abingdon, Oxfordshire, UK
[2] Mechanical Engineering Department, Imperial College, London, UK

Lithium-sulphur (Li-S) batteries have the potential to surpass the energy storage capability of Li-ion batteries due to their high theoretical gravimetric energy density of 2700 Wh/kg. However, the processes which drive the system behaviour are much more complex than those in a Li-ion cell, meaning that controlling them to realise energy densities much above 350 Wh/kg is challenging. In a Li ...

FEM Simulation of the Scanning Electrochemical Potential Microscopy (SECPM)

R. Hamou, P. Biedermann, M. Rohwerder, and A. Blumeneau
Max-Planck-Institut für Eisenforschung GmbH, Düsseldorf, Germany

The present work focuses on modeling a new experimental technique: Scanning Electro-chemical Potential Microscopy (SECPM), which is used to probe the potential profile of the electric double layer (EDL). We used an electrostatic approach to compute the EDL potential measured within the metallic probe. Also, we investigated the effect of the interaction of the electrode/probe double layers on the ...

Design and Implementation of a Small UAV’s Pod Equipped with a Solid Oxide Fuel Cell

N. Briguglio [1], G. Giacoppo [1], O. Barbera [1], F. Cipiti [1], M. Ferraro [1], G. Brunaccini [1], L. Di Giovanni [1], N. Randazzo [1], E. Antonucci [1]
[1] CNR ITAE, Italy

Unmanned aerial vehicles (UAVs) have recently received great interest due to their great potential in both military and civil applications [1-4]. Testing and construction of UAVs is expensive and time consuming and a simulation approach can help to reduce cost for both design and tests. In this paper, the authors have used COMSOL Multiphysics software to design a UAV’s pod equipped with a Solid ...

Lithium-Ion Battery Simulation for Greener Ford Vehicles

D. Bernardi
Ford Motor Company

Dr. Bernardi is a Research Engineer with Ford Motor Company in Dearborn, MI. Her research focuses on the analysis and simulation of electrochemical energy-storage and conversion systems. In particular, Dr. Bernardi develops mathematical models that predict system behavior and identify governing physicochemical processes. Experimental investigations support model development, analysis, and ...

An Agglomerate Model for the Rationalisation of MCFC Cathode Degradation

B. Bozzini[1], S. Maci[1], I. Sgura[2], R. Lo Presti[3], and E. Simonetti[3]
[1]Dipartimento di Ingegneria dell’Innovazione, Università del Salento, Lecce, Italy
[2]Dipartimento di Matematica, Università del Salento, Lecce, Italy
[3]ENEA Casaccia, Dipartimento TER, Centro Ricerche Casaccia, S. Maria di Galeria, Roma, Italy

This paper describes the numerical modeling of a key material-stability issue within the realm of Molten Carbonate Fuel Cells (MCFC). The model describes the morphological and attending electrocatalytic evolution of porous NiO electrodes and is apt to predict electrochemical observables that can be recorded during Fuel Cell operation. The model has been validated with original experimental data ...

Kinetic Investigation of a Mechanism for Generating Microstructures on Polycrystalline Substrates Using an Electroplating Process

T. Soares[1], H. Mozaffari[2], H. Reinecke[1]
[1]Universität Freiburg, Freiburg im Breisgau, BW, Germany
[2]Hochschule Furtwangen, Tuttlingen, BW, Germany

The purpose of this study is to understand the growth mechanism of copper (Cu) films on a Cu-Zn system substrate with a pre-defined pattern. The pattern was defined by conducting a selective etching process on a two-phase polycrystalline substrate. As a result of this process, there were etched regions correspondent to beta-phase crystals and quasi non-etched regions that belong to alpha-phase ...

Dependence of the Current Density Distribution with Flow Channel Geometry in a Half-Cell Model - new

O. Beruski[1], J. Perez[1]
[1]Institute of Chemistry of São Carlos, São Carlos, SP, Brazil

The present work demonstrates that a simple half-cell model is capable of reproducing qualitatively the main features of the measurements of the current density distribution in a high-temperature polymer electrolyte fuel cell, pointing that computational modeling and simulation are an important tool in the development of such devices. Our main interests with such a model is to optimize working ...