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.

Numerical Modeling of a Microtubular Solid Oxide Fuel Cell Using COMSOL Multiphysics®

P. Pianko-Oprych[1], E. Kasilova[1], Z. Jaworski[1]
[1]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 ...

热管与相变材料相结合的锂电池热管理研究

江智元 [1], 王琼 [1],
[1] 西安交通大学,西安,中国

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 ...

Simulation of the Shape of Micro Geometries Generated with Jet Electrochemical Machining

M. Hackert[1], G. Meichsner[2], and A. Schubert[1,2]
[1]Micromanufacturing Technology, Chemnitz University of Technology, Chemnitz, Germany
[2]Fraunhofer Institute of Machine Tools and Forming Technology, Chemnitz, Germany

Electrochemical Machining with a closed electrolytic free jet is a special procedure to generate complex micro structures by help of anodic dissolution. The work piece shape is fabricated by supplying an electrolytic current through an electrolyte jet ejected from a small nozzle. In this study COMSOL Multiphysics is used to simulate the electric current density in the jet and the dissolution ...

3D Model for the Dynamic Simulation of SOFC Cathodes

A. Häffelin, J. Joos, M. Ender, A. Weber, and E. Ivers-Tiffée
Institut für Werkstoffe der Elektrotechnik (IWE)
Karlsruher Institut für Technologie (KIT)
Karlsruhe, Germany

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) ...

Improving the Sensoring of PEM Fuel Cell by Numerical Techniques - new

S. Skoda[1], E. Robalinho[2], E. F. Cunha[1], M. Linardi[1]
[1]Instituto de Pesquisas Energéticas e Nucleares - IPEN/CNEN-SP, São Paulo, SP, Brazil
[2]Universidade Nove de Julho - UNINOVE, São Paulo, SP, Brazil

The use of numerical techniques in PEM fuel cell sensoring represents an advantage of project engineering, reducing the costs and accelerating the manufacturing of prototypes. In this work some numerical responses are shown, relating to numerical sensoring of water and oxygen mole fractions at cathode of a 5 cm² of geometric area PEM fuel cell. The need to recognize a geometric figure of merit ...

Numerical and Experimental Study of Flow, Heat Transfer and Concentration in a Scaled-up Fuel Cell Anode Channel Model

J. C. Torchia-Nüñez[1], and J.G. Cervantes-de-Gortari[1]

[1]Department of Thermal Engineering, National University of Mexico, UNAM, Mexico City, Mexico

Flow, concentration and temperature fields are studied with numerical and experimental methods inside a scaled-up fuel cell anode channel model. The low aspect ratio channel has a porous medium as the inferior wall where a mixing of different pH solutions occurs. Chromatic change of phenolphthalein is used to visualize concentration field and Particle Image Velocimetry (PIV) is used to visualize ...

Electrical and Bubbly Flow Modeling of a Molten Salt Electrolysis Cell

A. Oury [1], P. Namy [1], A. M. Martinez [2] , K. S. Olsen [2], A. Solheim [2] ,
[1] SIMTEC, Grenoble, France
[2] SINTEF Materials and Chemistry, Trondheim, Norway

A laboratory-scale electrolysis cell for the recovery of metals is simulated with COMSOL Multiphysics® software. Two models are implemented: an electrical model simulating the current density (reaction rate) distribution at the electrodes and a laminar bubbly flow model which solves for the electrolyte velocity induced by gas bubble production at the anode. A parametric study on the mesh ...

Mathematical Formulation of a PEM Fuel Cell Model

E. Robalinho [1], E. F. Cunha [2], M. Linardi [2], E. I. Santiago [2],
[1] Instituto de Pesquisas Energéticas e Nucleares - IPEN/CNEN, São Paulo, SP, Brazil; and Instituto Federal do Rio Grande do Sul - IFRS, Porto Alegre, RS, Brazil
[2] Instituto de Pesquisas Energéticas e Nucleares - IPEN/CNEN, São Paulo, SP, Brazil

The idea of a friendly implementation of a mathematical formulation using specialist software was performed with the support of COMSOL Multiphysics® software with Chemical Reaction Engineering and Batteries & Fuel Cell Modules. The real problem of a Proton Exchange Membrane – PEM fuel cell modeling involves different scales, multiple variables and processes, coupling of solvers and experimental ...

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 ...

Numerical Study of Microfluidic Fuel Cell Performance

A. E. Khabbazi[1], A.J. Richards[1], and M. Hoorfar[1]
[1]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.