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.

Multi-Dimensional Adsorption Model of CO2/H2O Sorbent Bed

C. Gomez [1], R. F. Coker [1], J. Knox [1], G. Schunk [1]
[1] NASA MSFC, Huntsville, AL, USA

The primary interest of the VC (Vacuum Characterization) test is to experimentally characterize the adsorption and vacuum desorption of CO2 and water vapor of a pelletized sorbent bed in a large diameter column. The VC test article is shown in Figures 1 and 2. The aluminum canister is 3” in diameter and approximately 8” long allowing for variable sorbent bed loads from 1” to 6” in length. A ...

3D Modeling of Hydrogen Absorption in Metal Hydride Hydrogen Storage Bottles

R. Busqué [1], R. Torres [1], A. Husar [2], J. Grau [1]
[1] Escola Universitària d'Enginyeria Tècnica Industrial de Barcelona, Barcelona, Spain
[2] Institut de Robòtica i Informàtica Industrial CSIC-UPC, Barcelona, Spain

The storage of hydrogen as an absorbed element in metal hydride bottles is a promising technique for energy storage. In this work, a three-dimensional model of a charging process in a metal hydride container has been developed to simulate the absorption reaction and resultant heat and mass transport phenomena in metal hydride vessels. The model has been experimentally validated showing a good ...

COMSOL 在微波能领域应用研究

朱铧丞 [1], 张春 [1], 叶菁华 [1],
[1] 四川大学,成都,四川,中国

微波作为信息和能量的载体具有同等重要的应用价值,利用微波对物质产生的物理化学效应进行能量传递及转换已经在化学领域有了积极的应用。从 1986 年 R.N. Gedye 等人首次使用微波促进化学反应使其反应速率提高 1240 倍以来,有越来越多的微波和化学领域的科学家对相关问题进行了研究,并出现了一门新兴学科“微波化学”。微波化学作为研究微波能的一个方面是研究微波与化学反应体系相互作用的一个新兴学科。由于当前人们对微波加快化学反应的研究还非常肤浅,微波在大规模应用中并未发挥出其应有的巨大优势,微波化学进一步发展面临着巨大的挑战和机遇。目前微波化学的研究可以分为宏观和微观两个层面:(1)在宏观层面人们并不关心微波对分子之间行为的影响,其研究要用多物理场数值计算方法获得反应体系中电磁场、温度等物理量的分布和变化;(2)微观层面的研究,重点关注微波对反应分子之间相互作用的影响 ...

Modelling of the Temporal Analysis of Products (TAP) Reactor with COMSOL

S. Pietrzyk[1], A. Khodakov[1], and M. Olea[2]
[1]Unite de Catalyse et de Chimie du Solide, USTL-ENSCL-EC Lille, Villeneuve d’Ascq, France
[2]School of Science and Technology, University of Teesside, Middlesbrough, UK

A TAP reactor is a fixed-bed catalytic reactor operated in pulse (transient) mode under very low pressures. It has become a very important tool in catalytic studies as it fills the material and pressure gaps existing between practical conditions and high vacuum – monocrystal techniques. A pretreated solid catalyst maintained at a desired temperature in an evacuated chamber is exposed to a ...

Numerical Investigation of Mass Transfer with Two-Phase Slug Flow in a Capillary

W. Han, and B.H. Dennis
University of Texas, Arlington, TX, USA

The multiphase flow of two immiscible liquids in a microchannel was investigated numerically. A Y-shape micromixer was designed to produce a pattern of slugs from the flowing liquids. The mass transfer characteristics of this flow pattern are of primary interest in this study. A simple neutralization titration reaction was chosen as the basis. The liquid-liquid two phase slug flow was formed ...

Heat Transfer Modeling of Steam Methane Reforming

E. Carcadea[1], M. Varlam[1], I. Stefanescu[1]
[1]National Research Institute for Isotopic & Cryogenic Technologies, Rm.Vâlcea, Romania

Steam methane reforming is a widely studied process because of its importance for hydrogen production. A two-dimensional membrane-reactor model was developed to investigate the steam-methane reforming reactions. The use of membrane as membrane-reactor separator offer us few advantages because it help in continuously removing the hydrogen from the reaction zone, shifting the chemical equilibrium ...

Humidity Mass Transfer Analysis in Packed Powder Detergents

F. Zonfrilli[1], V. Guida[1], L. Scelsi[1]
[1]Procter & Gamble Italia, Pomezia, Roma, Italy

Powder detergents containing sodium percarbonate and bleach activators undergo chemical decomposition when exposed to high relative humidity. Controlling the moisture intake in finished product packs is therefore a fundamental need in order to guarantee product stability during the whole supply chain. In this paper we show how we have leveraged COMSOL Multiphysics capability in order to model ...

Virtual Functional Product Development of a µ-Methane Steam Reformer

T. J. Kazdal [1], M. J. Hampe [1],
[1] Technische Universität Darmstadt, Darmstadt, Germany

A micro steam methane reformer is a complex product consisting of multiple units. For the virtual functional product development it is necessary to validate these sub models separately. Therefore a reactor was designed to analyse kinetics of chemical reactions. The reactor design is based on a simulation geometry and the boundary conditions of the simulation were recreated in the experimental ...

Numerical Simulation of pH-sensitive Hydrogel Response in Different Conditions

M.K. Ghantasala[1], B.O. Asimba[1], A. Khaminwa[1], K.J. Suthar[2], D.C. Mancini[3]
[1]Department of Mechanical and Aeronautical Engineering, Western Michigan University, Kalamazoo, MI, USA
[2]Advanced Photon Source, Argonne National Laboratory, Argonne, IL, USA
[3]Physical Sciences and Engineering, Argonne National Laboratory, Argonne, IL, USA

The understanding of pH-sensitive hydrogel swelling response in different buffer environmental condition is essential for its use in different practical applications. This necessitates its simulation in steady state and transient conditions. This paper mainly deals with the details of the numerical simulation performed by developing coupled formulation of chemo-electro-mechanical behavior of ...

Numerical Model for Leaching and Transporting Behavior of Radiocesium in MSW Landfill

H. Ishimori[1], K. Endo[2], H. Sakanakura[2], M. Yamada[2], M. Osako[2]
[1]Ritsumeikan University, Kusatsu, Shiga, Japan
[2]National Institute for Environmental Studies, Tsukuba, Ibaraki Prefecture, Japan

This paper presents the numerical simulation model for radiocesium leaching and transporting behavior in municipal solid waste (MSW) landfill and discusses on the design for the required geometry and properties of the impermeable final cover and the soil sorption layer, which work for containment of hazardous waste such as radiocesium-contaminated MSW generated by Fukushima Daiichi nuclear ...