Aqui você encontrará apresentações realizadas nas Conferências de Usuários COMSOL de todo o mundo. As apresentações englobam pesquisas e produtos inovadores feitas por engenheiros e cientistas usando o COMSOL Multiphysics. Os tópicos abrangem uma grande gama de indústrias e aplicações, como elétrica, mecânica, escoamento e química. Use a função de busca "Quick Search" para encontrar apresentações na sua área de interesse.

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 ...

Modeling an Enzyme Based Electrochemical Blood Glucose Sensor with COMSOL Multiphysics

S. Mackintosh[1], J. Rodgers[1], S.P. Blythe[1]
[1]Lifescan Scotland, Inverness, Scotland

This paper describes the modeling of a blood glucose sensor using COMSOL Multiphysics. Chemical species interaction and diffusion, coupled with electrochemical oxidation of multiple blood species produced a powerful working model used in developing and refining a range of blood glucose sensors for the commercial market.

Numerical Analysis of the Self-Heating Behaviour of Coal Dust Accumulations - new

D.Wu[1], E. Van den Bulck[1]
[1]Katholieke Universiteit Leuven, Department of Mechanical Engineering, KU Leuven, Belgium

Introduction Self-heating behaviour of dust accumulations is a multiphysics field coupled heat and mass transfer in the porous media. A typical experimental apparatus with a hot storage oven and mesh wire baskets has been taken as the study object. The influence of gas flow velocity, oxygen concentration and ambient temperature on the self-heating behaviour of the dry coal dust sample has been ...

Simulation of Gravity-Driven Flow Through a Microfluidic Device on a Rocker Platform - new

B. Srinivasan[1], J. Hickman[1], M. Shuler[2]
[1]University of Central Florida, Orlando, FL, USA
[2]Cornell University, Ithaca, NY, USA

A micropump delivers fluid between different components of a microfluidic device in a controlled manner. The elimination of micropump can reduce the design complexity, simplify fabrication, shrink the device footprint and decrease the set-up time required for the operation of the microfluidic device. One such pumpless microfluidic device for body-on-a-chip application for drug toxicity studies ...

Finite Element Modeling of Vasoreactivity Using COMSOL Multiphysics® Software - new

J. Parikh[1], A. Kapela[1], N. Tsoukias[1]
[1]Biomedical Engineering Department, Florida International University, Miami, FL, USA

Localized calcium events in the endothelial cells (EC) can modulate smooth muscle cell (SMC) calcium (Ca2+) and membrane potential dynamics through release of endothelium derived hyperpolarizing and relaxing factors. Ca2+ levels in the smooth muscle cell (SMC) determine its contractile state.The underlying complex mechanism regulating the SMC Ca2+ levels and ultimately vessel tone remains poorly ...

Numerical Modeling and Performance Optimization Study of a Dehumidification Process in Nuclear Waste Storage

P. Geraldini[1]
[1]Sogin Spa, Rome, Italy

One of the main parameters to consider during the nuclear waste storage design phase is the drum corrosion risk. The humid-air corrosion models available in literature predict that, for carbon steel, the phenomena start to become appreciable for relative humidity (RH) values close to 65%. In general, the corrosion rate increases exponentially with relative humidity above the RH threshold. To ...

A Flow and Transport Model of Catalytic Multi-Pump Systems with Parametric Dependencies

A. Sen [1], D. Myers [1], A. Altemose [1],
[1] Department of Chemistry, Pennsylvania State University, University Park, PA, USA

This poster studies catalytic micropumps and their ability to induce fluid flow on the microscale. The goal of the study is to design a long-distance, directed convective loop. An array of catalytic micropumps was constructed in the domain, comprised of two distinct catalysts in an alternating pattern with a uniform concentration of their respective reagents in the surrounding geometry. Two ...

A Dynamic Simulation of Heterogeneous Catalysis with COMSOL Multiphysics® software

A. K. Patan [1], M. Mekala [1], S. K. Thamida [1],
[1] National Institute of Technology, Warangal, Telengana, India.

Reaction-Diffusion equation is simulated for heterogeneous catalytic reaction involving a porous catalyst particle surrounded by liquid reactants. COMSOL Multiphysics® software along with transport of dilute species module is used for this purpose. Global Variables such as reaction conversion are obtained through post-processing in COMSOL® software itself by evaluation of derived variables.

Adaptive Control of Simulated Moving Bed Plants Using Comsol’s Simulink Interface

M. Fütterer
Institut für Automatisierungstechnik, Otto-von-Guericke Universität, Magdeburg, Germany

Preparative chromatography is an important separation method where the simulated moving bed (SMB) technology is an increasingly used separation process for binary mixtures. Several chromatographic columns are arranged in a ring where the feedings and drains are changed cyclically to maintain a continuous separation. For this reason, an adaptive controller is proposed to adjust the flow rates ...

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 ...