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.

Fluid Dynamics Analysis of Gas Stream in a Plasma Torch Reactor

C. Soares[1], N. Padoin[1], F. A. Cassini[1], M. Sanchez[2]
[1]Federal University of Santa Catarina, Florianópolis, SC, Brazil
[2]University of Oklahoma, Norman, OK, USA

Plasma technology has potential applications in a wide range of areas, such as microwave reflectors/absorbers, material processing, sterilization and chemical neutralization. The knowledge about the fluid behavior in such systems has a central role, since the stability of the flow in the region of the electrical arc is essential for the development of a well-behaved torch. In this work, a ...

Fluid Flow Simulation of Preconcentration Membranes Using Finite Elements Tools

R. Inglés[1], J. Pallares[2], J.L. Ramirez[1], and E. Llobet[1]

[1]Dept. of Electronic, Electrical and Automatic Control Engineering, Universitat Rovira i Virgili, Tarragona, Spain
[2]Department of Mechanical Engineering School of Chemical
Engineering Universitat Rovira i Virgili, Tarragona, Spain

We use finite elements simulations in order to study the fluid flow behavior in a chamber of a preconcentrator. We realized that most part of the fluid does not affect our preconcentrator because it is going out the chamber at high distance above it and parallel to the preconcentrator. So, we are wasting most part of our fluid and we need a lot of time to have a good concentrator factor. We ...

The use of FEMLAB models to protect a monumental church organ in case of hot air church heating

Schellen, H.L., van Aarle, M.A.P., van Schijndel, A.W.M.J.
Technische Universiteit Eindhoven

The Walloon Church in Delft is an important monumental church in the Netherlands. The monumental interior parts consist of a monumental pulpit, monumental pews, monumental escutcheons and an important burial monument. The monumental Bätz/Witte organ in the church dates back to 1869 and was last restored in 2000. The heating system in the building was originally a direct hot air system, Mark Fohn ...

Cluster Diameter Determination of Gas-solid Dispersed Particles in a Fluidized Bed Reactor

M. Das
Department of Biotechnology, PESIT, Bangalore, Karnataka, India

Clustering is a common hydrodynamic characteristic observed among suspended gas-solid particles in a fast fluidized bed (FFB) regime of a circulating fluidized bed (CFB) system. In this paper clustering behavior has been studied with Geldart group B particles like coal and iron ore in a circulating fluidized bed of diameter 0.1016 m and height 5.62 m. The cluster size when calculated from the ...

Thermal Characterization of a Chemical Reactor Coupling COMSOL and ModeFrontier

N. Pacheco[1], D. Pavone[1], K. Surla[1], E. Schaer[2], and J. Houzelot[2]
[1]IFP-Lyon, France
[2]LRGP-ENSIC, France

For Hydrogen production purpose from bio-ethanol, IFP set up a pilot reactor that can work at high temperature (1000°C) and high pressure (20 bar). Experiments show that this reactor has a specific thermal behavior that should be modeled in addition to chemical and hydrodynamics to understand and optimize hydrogen production. The multiphysics simulator has been defined in COMSOL and the ...

Mass Transfer From a Rotating Cylinder in a Confined Gas Flow

N. Jand[1], A. Scarpetta[2], and M. Stefano[2]
[1]Chemical Engineering Department, University of L’Aquila, L’Aquila, Italy
[2]Faculty of Engineering, University of L'Aquila, L’Aquila, Italy

The modeling of sublimation form a rotating cylinder of solid naphthalene in a confined vessel has been performed by coupling the model of incompressible Newtonian fluid flow with the model of the dilute solutions. Preliminary a 2D axisymmetric system with swirl flow function for laminar and turbulent regimes has been considered. In the turbulent regime the RANS model with default parameter is ...

Surface Aeration System Modeling using COMSOL

G. Selembo, P. Selembo, J. Stanton, and G. Paulsen
University of North Carolina
Charlotte, NC

Surface aeration systems are used in the wastewater treatment industry for the transfer of oxygen in the activated sludge process. These systems are capital intensive and also require a significant amount of energy to operate. Scale-up and design of these systems is largely empirical, and due to the size of these systems, modifications for experimental testing can be economically prohibitive. ...

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 ...

Fully Coupled FEM Modeling of the Swelling Behavior of Human Intervertebral Disc in Response to a Change in Chemical Environment

G. K. Mistri[1], K. J. Suthar[2]
[1]Department of Mechanical and Industrial Engineering, University of Illinois at Chicago, Chicago, IL, USA
[2]Advanced Photon Source, Argonne National Laboratory, Argonne, IL, USA

The swelling behavior of human intervertebral disc is strongly influenced by chemical changes in the surrounding environment. Swelling of IVD is governed by various physical phenomena, including chemical and electric potential based transport, electrical charge balance, and swelling due to concentration difference within IVD relative to surrounding fluid. This change in geometry can be described ...

Multiscale Model of Human Pathogen Growth on Fresh Produce

A. Warning[1], A. K. Datta[1]
[1]Department of Biological & Environmental Engineering, Cornell University, Ithaca, NY, USA

Predictive food microbiology currently first requires experimental data for growth on fresh produce and then fitting an empirical or semi-empirical model to the data, making extrapolation to other conditions (temperature, type of produce) difficult. Herein, we develop a mechanistic model for the growth of human pathogenic bacteria (Escherichia coli O157:H7 and Salmonella spp.) on spinach using ...

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