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.

数值模拟涂层保护法保护碳钢电位分布

向斌 [1], 江露 [1], 周洋 [1], 王佳宁 [1]
[1] 重庆大学化学化工学院,重庆,中国

引言:钢结构设备的防腐保护主要采用阴极保护和涂层保护。其中,涂层保护除了防腐同时具备防红外、降温等特殊性能。 此次模拟,通过 COMSOL Multiphysics® 模拟设备在裸钢和 SiO2@ATO 涂层状态下的表面电位分布,证实了 SiO2@ATO 涂层的防腐性和抗红外及降温性能,并验证了 COMSOL Multiphysics® 数值模拟碳钢腐蚀表面电位分布的可靠性。 模拟过程中,假设电解质电导率为常数,阳极的各参数(尺寸、成分、分布等)保持不变。 计算方法:使用“二次电流分布”接口描述电极反应,“稀物质传递”接口描述亚铁离子输运,采用瞬态研究。参数: 1)温度 T; 2)电解质电导率 σ; 3)阴、阳极平衡电位 E_a、E_c; 4)阴、阳极交换电流密度 i0_c、i0_a; 5)传递系数 α 和 β; 6)初始时刻的亚铁离子浓度; 7 ...

Current Density Simulations in the Electrodeposition from Ionic Liquids: Effects of the Conductivity

I. Perissi[1], C. Borri[1], S. Caporali[1], and A. Lavacchi[1]
[1]Department of Chemistry, University of Firenze, Sesto Fiorentino, FI, Italy

The overall goal of this work is the use of COMSOL Multiphysics® in the modeling of the current density distributions for the electrodeposition of aluminum coatings from ionic liquids. The local current distribution is strongly dependant on the conductivity and on the geometry of the galvanic cell and can only be computed by the numerical solution of the partial differential equations ...

Modeling Hydrogen Permeation through a Thin TiO2 Film Deposited on Pd

Z. Qin[1], Y. Zeng[1], and D.W. Shoesmith[1]

[1]The University of Western Ontario, London, Ontario, Canada

Models that describe hydrogen permeation through a thin TiO2 film deposited on Pd have been developed based on a mass-balance equation consisting of diffusion, reversible hydrogen absorption/desorption, and irreversible hydrogen trapping. These models are solved by the finite element method using COMSOL Multiphysics. By comparing model simulations with experimental permeation curves, values of ...

Multiphysics Simulation of a Circular-Planar Anode-Supported Solid Oxide Fuel Cell

K. Daneshvar[1], A. Fantino[1], C. Cristiani[1], G. Dotelli[1], R. Pelosato[1], M. Santarelli[2]
[1]Politecnico di Milano, Dipartimento di Chimica, Materiali e Ingegneria Chimica “G. Natta”, Milano, Italy
[2]Politecnico di Torino, Dipartimento di Energetica, Torino, Italy

A 2D isothermal axisymmetric model of an anode-supported Solid Oxide Fuel Cell (SOFC) has been developed. Also a parametric analysis to find the effect of important parameters on the cell performance has been done. This simulation has been carried out at 1 atm and 1073 K. The PEN materials are traditional ones: Ni-YSZ/YSZ/LSM-YSZ as anode, electrolyte and cathode respectively.The developed ...

Electrochemical Pickling of Steel for Industrial Applications: Modeling

M. Freda[1], A. Giannetti[1], L. Lattanzi[1], S. Luperi[1]
[1]Centro Sviluppo Materiali, Rome, Italy

The electrochemical pickling of steel has two main purposes: 1) To remove thermal oxide; 2) To dissolve chromium-depleted layer, to reinstate the corrosion-resistant properties of the stainless steel; A reliable, flexible and robust 3D model has been made for simulating the steel electrochemical pickling. This process is modeled as a multiphysics system for the current control. The model ...

Thermal Diffusivity Test Bench for Li Ion Cells Using LiveLink™ for MATLAB®

A. Arzberger[1]
[1]RWTH Aachen University -ISEA-, Aachen, NRW, Germany

LiveLink™ for MATLAB® is used to fit the surface temperature of a battery cell within a COMSOL Multiphysics® model to the temperature measured by a thermal imaging camera. The test bench was designed and built up of ourselves to allow nondestructive thermal diffusivity measurement of Li Ion cells as a function of temperature, state of charge (SOC), state of health (SOH) and others. In that way ...

Hierarchical Modeling of Polymer Electrolyte Membrane Fuel Cells

J. Dujc[1], J.O. Schumacher[1]
[1]Zurich University of Applied Sciences (ZHAW), Institute of Computational Physics (ICP), Winterthur, Switzerland

A finite element model of a polymer electrolyte membrane fuel cell (PEMFC) is described in this paper. We divide the PEMFC into two separate and parallel 2D regions which are connected by the 1D regions representing the membrane electrode assembly (MEA). COMSOL Multiphysics® was used as a development tool for hierarchical 1D MEA models. Here we present a 1D model that is based on seven governing ...

COMSOL Multiphysics® as a General Platform for the Simulation of Complex Electrochemical Systems

A. Lavacchi[1]
[1]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 ...

Modelagem dos Processos de Descarga em Eletrodos de Baterias de Chumbo-Ácido

P. R. Impinnisi [1], L. F. Siqueira [1],
[1] Instituto Lactec, Curitiba, PR, Brasil

Foi desenvolvido um modelo 3D para simular descargas de eletrodos de baterias de chumbo-ácido. O modelo inclui a formação de filmes isolantes de sulfato de chumbo durante a descarga e permite visualizar a analisar a evolução da distribuição de linhas de corrente, os efeitos de bordas, os gradientes de concentração e outros fenômenos, nas regiões externas do eletrodo e no interior de poros.

Visualisation of the Internal Processes of a Fuel Cell with the Help of an Application Built with the COMSOL Multiphysics® Software

A. George [1], L. Fromme [1]
[1] University of Applied Sciences Bielefeld, Department of Engineering Sciences and Mathematics, Bielefeld, Germany

The objective was to make a visualisation application for the pupil's lab of the University of Applied Sciences Bielefeld. The application serves as a supplement for a workshop. It should provide a better understanding of a fuel cell, to visualize important influences and collect first experience with a simulation. To achieve this objective, a model of the fuel cell is created. The ...