Technical Papers and Presentations

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.

Phenomena of transient thermal transfers coupled with chemical reactions in an energetic material

Longuet, B.1, Gillard, P.1, 2
1 Laboratoire Energétique Explosions et Structures – Université d’Orléans, Bourges Cedex
2 Etablissement Technique de BourgeS, Rocade Est – Echangeur de Guerry, Bourges Cedex

An energetic material, subjected to an abnormal thermal environment, can undergo cookoff involving a variety of thermal, chemical and mechanical processes. The ability to predict not only the time to cookoff reaction but also the site and the degree of reaction violence that will occur in an ammunition is the principal goal in the current cookoff modelling efforts. Considering our knowledge of ...

CO2 capture by means of chemical looping combustion

Pavone, D.
IFP, Lyon, Vernaison, France

In a search of concepts for innovative reactors allowing CO2 capture in gas turbine, monolith based chemical looping combustion has been identified as a promising concept. A precise simulation of the chemical looping combustion in a channel of monolith is developed to define the design rules and the material specifications. The objective is also to evaluate this innovative process in terms of ...

A multiphysics approach of the styrene free radical polymerization modeling performed in different microreactors

Serra, C., Sary, N., Schlatter, G.
LIPHT-CNRS UMR 7165, ECPM-ULP Strasbourg

This paper investigates the modeling of styrene free radical polymerization in two different types of microreactor for which the wall temperature is kept constant. The simulations are performed with the help of FEMLAB 3.1 to solve simultaneously partial differential equations resulting from the hydrodynamics, thermal and mass transfer (convection, diffusion and chemical reaction). The ...

Finite Element Model of a Complex Glass Forming Process as a Tool for Control Optimization

F. Sawo[1] and T. Bernard[1]
[1]Fraunhofer Institute for Information and Data Processing IITB, Karlsruhe, Germany

This paper addresses the modeling of a complex glass forming process as an example of a complex, nonlinear distributed parameter system. The system is modeled by a fluid dynamics approach, which means that the forming is regarded as a fluid with free surfaces. Here, the coupling of the forming process with the heat flow is considered. The influence of crucial model parameters (e.g., dynamic ...

Modeling and Analysis of CaBr2 Hydrolysis

S.A. Lottes, and R.W. Lyczkowski
Argonne National Laboratory

The main focus of this paper is the modeling, simulation, and analysis of the CaBr2 hydrolysis reactor stage in the Calcium-Bromine thermochemical water splitting cycle for nuclear hydrogen production. One concept is to use a spray reactor of CaBr2 into steam. Given the large heat reservoir contained in a pool of liquid CaBr2 that allows bubbles to rise easily, using a bubble column for the ...

Evaluation of the Moderator Temperature Coefficient of Reactivity in a PWR

V. Memoli, and A. Cammi
Department of Nuclear Engineering, Politecnico di Milano, Milan, Italy

The moderator temperature coefficient (MTC) plays an important role within power thermal reactor dynamics. In order to run a reactor safely, a negative moderator coefficient temperature is necessary to reach stability during changes in temperature that can be caused by a step insertion of reactivity. Thus, MTC calculation is a key point in the reactor design process. The aim of the present work ...

A Model of a Horizontal Atmospheric Pressure Chemical Vapor Deposition Reactor

T. Adams

Naval Surface Warfare Center Crane Division, CRANE, IN, USA

A model of a horizontal atmospheric pressure chemical vapor deposition reactor was implemented to aid in the design of a laboratory based one. The model coupled momentum transport, energy transport, and mass transport phenomena to account for reacting fluid flow of a compressible gas in a heated chamber. The system modeled was silicon deposition from trichlorosilane in hydrogen carrier gas.

Model of Combustion Synthesis of Thermoelectric Calcium Cobaltates

J. Selig, and S. Lin
Lamar University, Beaumont, TX, USA

Self-propagating High-temperature Synthesis (SHS), a very economical synthesis of oxides was used in our lab to produce oxide materials. SHS process uses a highly exothermic reaction to convert reactants rapidly to pure products with minimal external energy input. This reaction is initiated by an igniter and reaction front propagates from the ignition through the rest of the sample. The fast ...

Modeling and Optimization of a Mg-Metal Hydride Rectangular Tank in the Hydriding Process

E.I. Gkanas[1], S.S. Makridis[1], A.K. Stubos[2], A. Lopez[3], J. Folch[4], G. Noriega[4]
[1]Materials for Energy Applications Group, Department of Mechanical Engineering, University of Western Macedonia, Greece
[2]Environmental Technology Laboratory, Institute of Nuclear Technology and Radiation Protection, NCSR “Demokritos”, Greece
[3]Universidad Politécnica De Cataluña, Barcelona, Spain
[4]Cidete INGENIEROS, Barcelona, Spain

Hydrogen storage can be considered as a key factor in the development of hydrogen economy. Hydrogen storage in a magnesium hydride MgH2 is a very promising technique for numerous of reasons. Magnesium is abundant, relatively cheap, life – friendly , weight storage capacity of 7.6% and low price of Mg metal. A simulation work is presented in order to study the absorption kinetics of a Mg – ...

Perforation Effect on a Rectangular Metal Hydride Tank for Hydriding and Dehydriding Process

E. Gkanas[1][2], S. Makridis[1][2], E. Kikkinides[1], A. Stubos[2]
[1]Department of Mechanical Engineering, University of Western Macedonia, Kozani, Greece
[2]Environmental Laboratory, Institute of Nuclear Technology and Radiation Protection, NCSR 'Demokritos', Agia Paraskevi, Athens, Greece

Hydrogen storage in a metal hydride bed, uses an intermetallic alloy that can absorb efficiently high amounts of hydrogen by chemical bonding resulting to metal hydrides. This alloy is capable of absorbing and desorbing hydrogen while maintaining its own structure. The heat, mass and momentum transfer in a metal-hydride reactor is mathematically described by energy, mass and momentum balance ...

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