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.

A Parametric Study of Shock Wave Simulations with Help of COMSOL Multiphysics

F. Ferrero[1], R. Meyer[1], M. Kluge[1], V. Schröder[1]
[1]BAM Federal Institute for Materials Research and Testing, Berlin, Germany

Adiabatic compression of gases can work as an ignition source and is still one of the main causes of accidents in chemical plants processing tetrafluoroethylene (Reza and Christiansen, 2007). The ignition of tetrafluoroethylene induced by adiabatic compression has been studied experimentally with a setup which allowed for the rapid opening of a high speed valve connecting two portions of a ...

Modeling of Non-isothermal Reacting Flow in Fluidized Bed Reactors

V. Orava [1], O. Souček [2], P. Cendula [1]
[1] Institute of Computational Physics, ZHAW, Winterthur, Switzerland
[2] Faculty of Mathematics and Physics, Charles University in Prague, Prague, Czech Republic

We investigate a prototype concept of a back-up electricity device where we use liquid formic acid (FA) to produce a mixture of carbon dioxide (CO2) and hydrogen (H2) which is used in a PEM fuel cell, Fig. 1. In the fluidized bed reactor the liquid FA is decomposed to a gaseous mixture of CO2 and H2 in the presence of microscopic floating solid catalytic particles. We describe the system, ...

Reynolds Number Dependent Porous Media Flow Using the Brinkman Equation

R. Rieck[1], A. Bénard[1], and C. Petty[1]
[1]Michigan State University, Michigan, USA

Porous media fluid dynamic modeling has been widely explored and utilized in many academic and industrial applications. Cross flow filtration being one attractive application, whereas the fluid and filtrate flow parallel the porous media, and thereby induce shearing stress along the membrane surface to reduce fouling. In modeling porous media flow, it is common to describe the porous domain by ...

Coupling Heat Transfer in Heat Pipe Arrays with Subsurface Porous Media Flow for Long Time Predictions of Solar Rechargeable Geothermal Systems

P. Oberdorfer[1], R. Hu[1], M. Azizur Rahman[1], E. Holzbecher[1], M. Sauter[1], P. Pärisch[2]
[1]Applied Geology, Geoscience Centre, University of Göttingen, Göttingen, Germany
[2]Institute for Solar Energy Research Hameln/Emmerthal (ISFH), Emmerthal, Germany

An increased share of renewable energies is regarded as an integral part of a strategy towards a sustainable future. With regard to the heat supply sector this may be achieved using solar thermal collectors or heat pump systems with borehole heat exchangers. During the last years solar thermal and geothermal systems have generally been installed separately. Now, several proposals are discussed ...

Simplified Numerical Model of an Axial Impeller

A.-M. Georgescu[1], S.-C. Georgescu[2]
[1]Hydraulics and Environmental Protection Department, Technical University of Civil Engineering, Bucharest, Romania
[2]Hydraulics Department, University “Politehnica”, Bucharest, Romania

We propose a simplified numerical method to model the flow field downstream of an axial impeller. The method can be used for any axial hydraulic machinery for which, one is less interested by the flow between the blades, than by the flow field downstream of the machinery. The method is applied to an axial fan for which the pressure - flow rate curve is available. Numerical results are obtained ...

Numerical Simulation of the Effect of Inlet Design on Thermal Storage Tank Performance Using COMSOL Multiphysics®

W. Yaïci[1], M. Ghorab[1], E. Entchev[1]
[1]Natural Resources Canada, CanmetENERGY, Ottawa, ON, Canada

This study presented the results of 3D unsteady CFD simulations to investigate the influence of adding a flat baffle plate at the entrance during the discharging operation on the flow behaviour, thermal stratification, and performance of a hot water storage tank installed in solar thermal energy systems. The CFD results showed that the plate modified the flow field close to the inlet jet, ...

Simulation of Mass Transfer in a Microfluidic Experiment Using the Moving Mesh Method - new

K. Weisbrod[1], R. Roberts[1], R. Chamberlin[1], S. Yarbro[1]
[1]Los Alamos National Lab, Los Alamos, NM, USA

Multiphase flow in a microreactor was studied numerically for two immiscible liquids. Validation of the model was sought by simulating the flow behavior and mass transfer characteristics of a neutralization reaction described in the literature. Contact angles, interfacial tension and the pressure field defined the interfacial boundary configuration. After first performing simulations to capture ...

Modeling of Straight Jet Dynamics in Electrospinning Process

R. Pandya [1], A. Kumar [2], V. Runkana [1],
[1] Tata Research Development and Design Centre, Tata Consultancy Services, Pune, India
[2] Indian Institute of Technology, Delhi, India

Electrospinning is a process where high voltage is applied to produce polymer fibers of nanoscale diameter. Various polymers have been used for this process in molten form or as a solution with an appropriate solvent such as glycerol. The melt solidifies while the solvent evaporates to produce fibers. The fibers produced have properties such as high surface to volume ratio and a molecular ...

A Theoretical Model for the Control of Color Degradation and Microbial Spoilage Occurring in Food Convective Drying

S. Curcio[1], M. Aversa[1]
[1]University of Calabria, Department of Engineering Modeling, Rende, Cosenza, Italy

The aim of this work was the development of a predictive model aimed at identifying a proper control strategy of food drying process. In particular, it was intended to determine the effect of operating conditions both on the color degradation, chosen as a reference quality parameter, and on the microbial spoilage occurring during potatoes drying. A transport model, accounting for the ...

Studying Magnetohydrodynamic Effects in Liquid Metal Flow Under Transverse Magnetic Field Using COMSOL Multiphysics®

S. Sahu[1], R. Bhattacharyay[1], E. Rajendrakumar[1]
[1]Institute for Plasma Research, Bhat, Gandhinagar, India

Liquid metals are foreseen as a multipurpose coolant in fusion blanket systems. However, the strongly magnetic environment of the fusion reactor hinders the regular flow of the liquid metal. It interacts with transverse magnetic field and produces a Lorentz force opposing the flow, modifying the regular flow profile in the circular pipe or rectangular ducts. Complex geometry and lack of ...