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.

Numerical Investigation of Heat Transfer of Aluminum Metal Foam Subjected to Pulsating Flow - new

A. Bayomy[1], M. Z. Saghir[1]
[1]Ryerson University, Toronto, ON, Canada

The rapid development of electronic devices leads to more demand for efficient cooling techniques. Porous media represent a convincing passive cooling enhancer due to its large contact surface area to volume ratio and intense mixing of fluid flow. In the present work, numerical studies have been investigated to study the heat transfer characteristics of aluminum porous metal foam subjected to both ...

Secondary Flow of Liquid-liquid Two-Phase Fluids in a Pipe Bend

M. Ayala [1], P. Santos [2], G. Hamester [2], O. Ayala [3],
[1] Department of Mechanical Engineering, Universidad de Oriente, Puerto La Cruz, Venezuela
[2] Brazil Scientific Mobility Program, CAPES, Brasilia DF, Brazil
[3] Department of Engineering Technology, Old Dominion University, Norfolk, VA, USA

As the flow passed through the pipe, and entered the bend, various vortical structures appear, meaning that there is a secondary flow emerging. Also while the flow is in the bend gravity forces affect distinctively its behavior as long as the centrifugal force is not greater. From this study, it appears that the fluid behavior on the pipe bend is strongly related to gravitational and ...

Modal Analysis of Elastic Ring Squeeze Film Damper for Small Gas Turbine Engines

S. Thennavarajan[1][2], P. Jeyaraj [1], L. P. Manikandan [2], S. S. Kulkarni [2], S. Jana [2],
[1]Department of Mechanical Engineering, NITK, Surathkal, Mangalore, Karnataka, India
[2]CSIR- National Aerospace Laboratories, Bengalore, Karnataka, India

The high speed gas turbine is a power plant developed for modern aircrafts. It is widely used and developed because it can meet the high power to weight ratio. The rotor system of modern small gas turbine works above the critical speeds. Hence, there is a stricter requirement for the control and isolation of vibration magnitude under heavy unbalance load and passing through critical speeds. An ...

Comparing Equations for Two-Phase Fluid Flow in Porous Media

T. Bjornara, and E. Aker
NGI, Oslo, Norway

Various types of equation system formulations for modeling two-phase flow in porous media using the finite element method have been investigated. These allow for equation manipulation such that the main differences between the formulations are the dependent variables that are solved for. Here we have tested five different formulations for 2D simulations and one for 1D; the Buckley-Leverett ...

Computational Modeling and Simulation of the Human Duodenum

B. Hari[1], S. Bakalis[1], P. Fryer[1]
[1]The University of Birmingham, School of Chemical Engineering, Edgbaston, Birmingham, United Kingdom

Worldwide attention in the computational modeling and simulation of the human intestine is increasing in order to help understand its complex behavior and improve health. Computational fluid dynamics is an essential tool to understand the mechanics and transport phenomena of the human intestine, thereby advancing the diagnosis and treatment of gastrointestinal related diseases. The aim of this ...

Modeling of the Reduction Stage during the Continuous Refining of Copper in a Packed Bed Reactor

F. Mansilla[1], L. Voisin [2]
[1]Advanced Mining Technology Center, Chile University, Santiago, Chile
[2]Department of Mining Engineering, Advanced Mining Technology Center, Chile University, Santiago, Chile

Throughout history, the copper pyrometallurgical processes have been carried out mostly in discontinuous or batch systems. In recent decades new continuous technologies have been developed but focused only on Smelting and Converting stages leaving aside the Refining one. In 2002 a novel technology was proposed by the Department of Mining Engineering of Chile University which consists in two ...

Coupled Electric-Thermal-Fluid Analysis of High Voltage Bushing

G. Eriksson[1]
[1]ABB, Corporate Research, Västerås, Sweden

Modern power transmission systems are in general designed to operate at high voltages in order to reduce resistive losses generated by high currents. This, however, tends to increase the risk for dielectric breakdown or flashovers if the equipment is not properly designed to withstand the stress. The present work illustrates how multiphysics simulations can be used to analyze and predict the ...

Numerical Study of the Self-ignition of Tetrafluoroethylene in a 100-dm3-reactor

F. Ferrero[1], M. Kluge[1], R. Zeps[1], T. Spoormaker[2]
[1]BAM Federal Institute for Materials Research and Testing, Berlin, Germany
[2]Chairman PlasticsEurope Fluoropolymers TFE Safety Task Force, Du Pont De Nemours, Dordrecht, The Netherlands

The self-ignition of tetrafluoroethylene (TFE) caused by contact with hot surfaces has been analyzed with the help of simulations performed with COMSOL Multiphysics®. The current study focuses on large-scale heated reactors for the industrial production of polytetrafluoroethylene (PTFE) from TFE at high pressures. Simulations of the self-heating and consequent self-ignition of TFE in a 100-dm3 ...

Numerical Modelling of Vortex Induced Vibrations  in Submarine Pipelines

F. Van den Abeele, J. Vande Voorde, and P. Goes
ArcelorMittal Research & Development Industry Gent, Zelzate, Belgium

Vortex-induced vibration is a major cause of fatigue failure in submarine oil and gas pipelines and steel catenary risers. Even moderate currents can induce vortex shedding. In this paper, COMSOL Multiphysics is applied to study the flow pattern around submarine pipeline spans, and predict the amplitude and frequency of the vortex induced vibrations. The sensitivity of the computational fluid ...

Modeling of Near-Field Ultrasonic Levitation: Resolving Viscous and Acoustic Effects

I .F. Melikhov [1], A. S. Amosov [1], S. A. Chivilikhin [2],
[1] Corning Scientific Center, Saint Petersburg, Russia
[2] ITMO University, Saint Petersburg, Russia

Ultrasonic levitation is a novel technology for contactless handing of various objects. It is already used in various manufacturing processes where it is important to keep untouched surface. In this paper we introduce a model of so-called near-field ultrasonic levitation which allows flying heights of the hundred-micron order. Our model computes air flow in the gap between a vibration source and ...