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.

Modeling of an LTCC mixer/combustor

Espinoza Vallejos, P.A.1, Furlan, R.2, Sotero-Esteva, J.2, Perez Tolentino, M.2, Wagner Simoes, E.3, Santiago-Aviles, J.J.4
1 Technology Assessment and Transfer, Millersville, MD
2 University of Puerto Rico at Humacao, Humacao, PR
3 Laboratory of Integrated Systems of the University of Sao Paulo, Brazil
4 University of Pennsylvania, Philadelphia, PA

The high energy density of some fossil fuels makes them attractive to power portable devices through the use of thermoelectric conversion elements. The idea explored here is the fabrication of a ceramic combustor using Low Temperature Co-Fired Ceramics tapes. We would like to optimize through simulations the pre-mixing of the fuel (Hydrogen gas) and oxidizer (Oxygen from Air), and the ...

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 ...

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 ...

Visions Realized: Using COMSOL Multiphysics to Prepare Students for the Modern World

Bruce A. Finlayson
University of Washington
Washington, USA

This talk demonstrates the success in teaching chemical engineering undergraduates to use COMSOL Multiphysics (FEMLAB) to solve realistic problems in a project format. Undergraduates have been creative and solved problems much more difficult than those in their textbooks, thus gaining a deeper understanding of transport processes. Illustrations are also given how they check to see they’ve ...

Chromatographic Separation of Tröger’s Base in a Batch Column

A. Fayolas [1], M.G. Sanku[1], M. Pascoa[1], M. Xynou[1]
[1]KTH Royal Institute of Technology, Stockholm, Sweden

The objective of the study is to investigate the chiral separation of Tröger’s base enantiomers using batch chromatography. Because of its resolution, chromatography is often the preferred method for chiral separations. The separation of Tröger’s base is resolved by using the COMSOL Multiphysics® software. It is modeled by one dimension geometry, having the length of the column set and ...

Reacting Flows in Industrial Duct-burners of a Heat Recovery Steam Generator

G. Petrone[1], G. Cammarata[1], S. Caggia[2], and M. Anastasi[2]
[1]Department of Industrial and Mechanical Engineering, University of Catania, Catania, Italy
[2]Engineering Maintenance - ISAB Energy Services, Priolo Gargallo, Italy

In this study, COMSOL Multiphysics is applied in order to simulate reacting flows for duct burner systems arranged in the post-firing section of a Heat Recovery Steam Generator of a combined cycle power plant. Two- and three-dimensional simulations are carried out in order to investigate on operative conditions mainly responsible of duct burners overheating. The results are obtained for several ...

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 ...

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 the ...

Simulation of Gravitational Instability During CO2 Absorption in a NaHCO3/Na2CO3 Solution

C. Wylock[1], A. Rednikov[1], B. Haut[1], P. Colinet[1]
[1]Université Libre de Bruxelles (ULB), Transfers, Interfaces and Processes (TIPs), Brussels, Belgium

This work deals with the modeling and the numerical simulation of the CO2 absorption, coupled with a chemical reaction, in an initially quiescent aqueous solution of sodium carbonate (Na2CO3) and bicarbonate (NaHCO3), inside a Hele-Shaw cell. In our Hele-Shaw cell, the liquid fills partially the gap between two parallel transparent Plexiglas plates. CO2 is forced to flow above the liquid in the ...

Can Oscillatory Convection Accelerate Signal Propagation in Simple Epithelium?

M. Nebyla[1], M. Pribyl[1]
[1]Institute of Chemical Technology, Prague, Department of Chemical Engineering, Prague, Czech Republic

We introduce a mathematical model of signal transmission in simple epithelial layers. The mathematical model consists of reaction-transport equations for extracellular ligands, cellular receptors, ligand-receptor complexes and a ligand releasing protease. We consider diffusion and nonstationary convective transport of protein ligands in the extracellular space. The study was carried out using ...

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