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.

Thermal Modelling For The Implementation Of An Energetic Efficiency Control System In A Room Of Meetings Of Singular Geometry

M. Martínez, V. Fuster, J. Fernández, and I. Benítez
Instituto Tecnológico de la Energía (ITE), Paterna, Valencia, Spain

The aim of this Project is to obtain a temporary and spatial evolution model of the temperature into a meeting room with the aim to develop an efficient energy mechanism which can improve the air conditioner control system. The project has considered two extremes cases: on the one hand a typical summer day and on the other hand a winter day. From annual data of the Institute weather station a ...

Advanced Multiphysics Actuation Model of Ionic Polymer-Metal Composites

D. Pugal[1], K. Kim[1], and A. Aabloo[2]
[1]ME Department, University of Nevada Reno, Reno, NV
[2]University of Tartu, Tartu, Estonia

Modeling electromechanical actuation of ionic polymer-metal composite (IPMC) material is considered in this work. Ionic current in the polymer is described with the Poisson-Nernst-Planck system of equations. Calculated ionic concentration is related to the deformation of the material. To include the effect of the electrodes, the ionic current and the electric current in the electrode domains is ...

Efficiency of Evacuated Tubular Solar Thermal Collector

J. Ma and X. Wei
Southeastern Louisiana University
Hammond, LA

Using COMSOL® 3.5a, models were created to simulate the heat transfer between the working fluid and the selective coating as well as the natural convection of the working fluid itself. In these models, a constant heat input on half of the selective coating facing the sun was considered as energy input from the sun, and the open end of the tube, where the working fluid can flow in and out of the ...

FSI for Coolant Flow in Research-type Nuclear Reactors

F. Curtis[1], K. Ekici[1], and J. Freels[2]
[1]University of Tennessee, Knoxville, TN
[2]Oak Ridge National Lab, Oak Ridge, TN

The High Flux Isotope Reactor, located at the Oak Ridge National Laboratory, is scheduled to undergo a conversion of the fuel used and this proposed change requires an extensive analysis of the flow through the reactor core. The core consists of approximately 500 very thin and long fuel plates through which the coolant (water) flows at a very high rate. Therefore, the design and the flow ...

Making Cartograms and Using them for Data Acquisition

P. Mercure[1], and R. Haley[2]
[1]The Dow Chemical Company, Midland, MI
[2]ATM Research, Midland, MI

We demonstrate cartogram construction, where a geographical map is distorted to represent some measure, for example population, while trying to keep the shape of regions recognizable. We then apply this cartogram construction technique to optimize thermocouple locations. A heat generation and conduction model is used initialize the cartogram construction algorithm. A uniform distribution of ...

Modeling of Non-Equilibrium Effects in the Gravity Driven Countercurrent Imbibition

M. Chahardowli[1], R. Farajzadeh[1], J. Bruining[1]
[1]Department of Geotechnology, Delft University of Technology, Delft, The Netherlands

One of the main mechanisms in the secondary oil migration from the source rock into oil traps is gravity driven countercurrent imbibition. Many mathematical models describe countercurrent imbibition considering local equilibrium. However, Barenblatt proposed a model to describe the effect of non-equilibrium in oil water displacement. Here, the proposed model was implemented in a gravity driven ...

The Friction Coefficient of Fractal Aggregates in the Continuum and the Transition Regimes

A. Melas[1][3], A.G. Konstandopoulos[1], L. Isella[2], Y. Drossinos[1]
[1]Department of Chemical Engineering, Aristotle University, Thessaloniki, Greece
[2]European Commission, DG Energy, Luxemburg
[3]European Commission, Joint Research Centre, Ispra, Italy

Aerosol and colloid aggregates are complex fractal-like structures composed of primary spheres. The drag force exerted on a fractal-like object is usually determined by solving numerically the Stokes equation. In this study we calculate it by relating it to a molecule-aggregate collision rate. We create the fractal aggregates with a cluster-cluster aggregation algorithm using the software ...

Passive Cooling of Power Electronics: Heat in the Box

M. Berger[1], W. Schernus[1]
[1]West Coast University of Applied Sciences, Heide, Germany

Results presented are a contribution to the design of a 5kW-DC-AC-converter for applications in forklifts. The device is located in a closed environment and entirely operated with passive cooling. Due to concurrent engineering approach and environmental conditions correct prediction of absolute temperature values by simulation was crucial. Heat sinks have been modeled properly and a thermal ...

Simulation of Differential Ion Mobility (DMS) Principle Coupled with Mass Spectrometry in Atmospheric Pressure

F. Sinatra[1], T. Wu[2], A. Avila[2], E. Nazarov[1], T. Evans-Nguyen[1], J. Wang[2]
[1]Draper Laboratory, Tampa, FL, USA
[2]University of South Florida, Tampa, FL, USA

Mass spectrometry is an analytical technique widely used in the scientific community to determine chemical composition of sample compounds. Typically, mass spectrometers perform their analysis under vacuum conditions, though atmospheric pressure mass spectrometers are becoming more prevalent. With the development of atmospheric pressure mass spectrometers, techniques such as FAIMS (Field ...

Modeling the Effect of Discrete Distributions of Platinum Particles in the PEM Fuel Cell Catalyst Layer

C.F. Cetinbas[1], A.K. Prasad[2], S.G. Advani[1]
[1]Center for Fuel Cell Research, Department of Mechanical Engineering, University of Delaware, Newark, DE, USA
[2]University of Delaware, Newark, DE, USA

In this study, the basic catalyst layer (CL) structure, consisting of carbon-supported Pt particles (C|Pt) and an ionomer binder, is investigated numerically by using COMSOL. The significance of modeling discrete Pt particles on the carbon support is highlighted by comparing the cell performance results to the case in which the Pt is assumed to be distributed uniformly over the carbon support as ...