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.

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 ...

Development and Production of a Box for Storage and Shipping of HDIs in the Upgrade of the CMS Experiment

F. Noto[1], S. Costa[2], N. Giudice[2], F. Librizzi[3], A. Rapicavoli[2], M.A. Saizu[4], V. Sparti[3]
[1]Instituto Nazionale Fisica Nucleare, Sezione di Catania, Catania, Italy; Dipartimento di Fisica ed Astronomia, Università di Catania, Catania, Italy
[2] Dipartimento di Fisica ed Astronomia, Instituto Nazionale Fisica Nucleare, Sezione di Catania, Catania, Italy; Università di Catania, Catania, Italy
[3]Instituto Nazionale Fisica Nucleare - Sezione di Catania, Catania, Italy
[4]Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest-Magurele, Romania

The Large Hadron Collider at CERN has begun operations at 7 TeV center of mass energy. CERN plans to run at this energy until the end of 2012 with the goal of providing an integrated luminosity of a few fb?¹ to the CMS and ATLAS experiments. The LHC will then shut down for 1.5 to 2 years to make the revisions necessary to run at ~14 TeV. Operation resumes in 2014. In 2017/18, there will be ...

Structural Analysis of a Pressure Sensor for High Temperature Environments

S.V. De Guido[1], G.S. Masi[1], P. Vladimirovich Miodushevsky[1], L. Vasanelli[1]
[1]Department of Innovation Engineering, University of Salento, Lecce, Italy

Pressure sensors operating at the temperature higher that 500 °C are absent in the world market. Our goal is to develop a pressure sensor that can operate at the high temperature up to 700 °C. Our sensor will be made up of a ceramic sensible element and a metallic case. The sensible element will be a ceramic beam with a Weathstone bridge on its surface. A structural analysis on the case has ...

Using COMSOL for Optimal Design of Engineering Barriers of Nuclear Waste Repositories

L.M. de Vries[1], A. Nardi[1], A.E. Idiart[1], P. Trinchero[1], J. Molinero[1], F. Vahlund[2], H. von Schenck[2]
[1]Amphos 21, Barcelona, Spain
[2]Swedish Nuclear Fuel and Waste Management, Stockholm, Sweden

The Swedish Nuclear Fuel and Waste Management Co (SKB) is responsible for final disposal of spent fuel and radioactive waste. SKB operates SFR, an underground waste repository in crystalline rock. The evolution of groundwater flow within the repository needs to be estimated considering different options for the design of the engineered barriers. The goal is to predict the effects of flow and ...

Prototype Probe Development for Liquid Injection Shutdown System Tube Gap Detection by Remote Field Pulsed Eddy Current Technique

T. V. Shyam[1], B. S. V. G. Sharma[1], J. N. Kayal[1]
[1]Bhabha Atomic Research Centre, Trombay, Mumbai, India

Pressurised Heavy Water Reactors (PHWR) play a prominent role in contributing power for the Nuclear Energy Programme in India. In 540MWe type PHWR reactors, there are horizontally placed Liquid Injection Shutdown System (LISS) tubes for injecting poison into the moderator to clamp down the nuclear power under trip conditions. The Horizontally placed LISS pipes are placed perpendicular to the ...

Design and Analysis of MEMS Micro Mirror using Electro Thermal Actuators

L. Sujatha[1], D. K. Balasubramanian[2], V. S. Selvakumar[1]
[1]Rajalakshmi Engineering College, Chennai, India
[2]University of Central Florida, Orlando, Florida, United States

Micro Mirror is a versatile device which has been gaining popularity and also the importance of MEMS techniques to develop such devices. These mirrors find applications in fields such as optical switching, display and in medical fields for non-invasive imaging. A thermally actuated mirror moves in either vertical or horizontal directions for the given orientation. The ends of thermal actuators ...

RF Hot-Zone Location within Rectangular Confined Spaces

R. Rodriguez[1]
[1]University of the West Indies, St. Augustine, Trinidad and Tobago

RF propagation modelling in (30 – 1000 MHz) SAR region for predicting the location and intensities of constructive interference patterns within rectangular confined spaces using waveguide theory and ray tracing techniques.

Wireless Power and Communications for Implantable Biosensors

C. Romero[1], M. Mujeeb-U-Rahman[1]
[1]California Institute of Technology, Pasadena, CA, USA

Implantable biosensors have the potential to revolutionize the healthcare industry by allowing patients and their health care providers to continuously monitor blood pH levels, pCO2, proteins, metabolites, and a wide variety of other biomolecules. These devices need to operate completely wirelessly to be used for long term monitoring. Metal coils are attractive candidates for wireless power ...

Numerical Modeling of Power Reactors' Fuel Bundles

R. Schmidt[1], T. Yousefi[2], B. Farahbaksh[2], M. Z. Saghir[2]
[1]University of Louisiana at Lafayette, Lafayette, LA, USA
[2]Ryerson University, Toronto, ON, Canada

Fuel bundles in the CANDU (CANada Deuterium Uranium) reactor are designed for heating a pressurized coolant (heavy water) to generate electricity. The designs for the fuel bundles differ based on the number of heating elements. The flow of heavy water over the elements and inside the shell is highly turbulent. In this paper, COMSOL Multiphysics® is used to simulate the heavy water flow ...

Phase-sensitive Microcalorimetry for Study of Low-level Radioactive Sources

H. Chen-Mayer[1], R. E. Tosh[1]
[1]NIST, Gaithersburg, MD, USA

Microcalorimetry for standardizing activities of radionuclide samples entails measurements of input power heat flow from the sample cell, with the radioactive sample compared to the reference cell under balanced conditions. The measurement is susceptible to noise due to drift and 1/f effects; thus, a better result might be expected with periodic insertion of the source into the sample chamber and ...

Quick Search

3211 - 3220 of 3645 First | < Previous | Next > | Last