J. P. Caire, and A. Roure
LEPMI-ENSEE, Saint Martin d'Hères, France
The generation 4 of molten salt reactors using the thorium cycle are characterized by a temperature close to 1000 oC. The very large heat transfers involved between the reactor core and the external parts with minimal thermal losses are a major issue. This study investigated a possible inner loop made of a series of conventional graphite filter plate exchangers, pipes and pumps, using the COMSOL ...
Study of Electronic Properties of Nanocrystals from Different Points of View: From a Simple 2D Electrostatic Approach to 3D Poisson-Schrödinger Simulations
D. Deleruyelle, A. Guiraud2, and G. Micolau2
1Université Provence (Aix-Marseille I), Marseille, France
2Université Paul Cézanne (Aix-Marseille III), Marseille, France
In this paper, a study of the electronic properties of nanocrystals is presented. During this work, COMSOL Multiphysics has been used to develop various approaches to study the evolution of the floating potential of a single nanocrystal embedded in a dielectric medium. First of all, we considered the nanocrystal as a perfect conductor and applied a simple 2D electrostatic treatment, using ...
Department of Mathematics and Computer Science, Royal Military College of Canada, Kingston, ON, Canada
Preliminary results of the Relaxation probe (RP) in the Huygens experiment have provided evidence that the potential profiles around sensors do not obey to a Laplace field, but to a Poisson field. In this present work, we analyze possible interactions or shadowing effects between sensors, booms and the gondola, and the data processing of RP sensors. The governing equations for the fluid model ...
M. K. Smith
Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, USA
Computers are used every day to efficiently perform mathematical computations. For engineers to work efficiently, abstraction is necessary; this means hiding lower-level details of an algorithm to emphasize higher-level structure. In this presentation, the fluid exploration with CFD is explored. The presentation is based on a course held at Woodruff School of Mechanical Engineering.
LGS, Bell Labs Innovations, Whippany, NJ, USA
The eigenmode solver is used to analyze the behavior of small multi-element antennas. We perform an eigenmode simulation of the shorted antenna structure, using perfectly matched layer (PML) outer boundaries, and for some simulations, we include a current source located at the feed point of the antenna.Doing this enables the eigenmode simulation to determine both the Q-factor and radiation ...
Korea Atomic Energy Research Institute, Korea
This paper presents the application of the nesting method to wind fields on coarse grid to then produce a fine grid wind fields. This is done using COMSOL Multiphysics. Fine-grid wind fields, which are considered to be an urban structure, were useful in drawing scenarios for counter terrorist attacks.Also, it was confirmed that COMSOL Multiphysics could be easily applicable to multi-nesting to ...
L. Verbruggen1, J. Kotiniitty2, and M. Lehtonen1
1Power Systems and High Voltage Laboratory, Helsinki University of Technology, Helsinki, Finland
2Nokian Capacitors Ltd., Tampere, Finland
A crucial factor concerning modern reactors is a combination of laws and electro-technical rules defining appropriate produced sound levels. Currently, it is an important issue to reduce noise in order to fulfill all sound requirements. Noise results from reactor vibrations due to sinusoidal currents flowing through the reactor. The flowing currents induce electromagnetic fields which generate ...
S. Palaich, and B. Daly
Physics and Astronomy Department, Vassar College, Poughkeepsie, NY, USA
When the dimensions of the material approach is a comparable size to the phonon mean free path, heat flow enters a new regime, the nanoscale. The Fourier and Cattaneo Equations describe bulk heat flow well, but radiative boundary terms must be considered when modeling nanoscale heat flow. We take these equations and input them into COMSOL with the hope of eventually linking nanoscale and bulk ...
Institute of Applied Mechanics, Poznan University of Technology, Poznan, Poland
An external magnetic field imposed on a ferrofluid with a temperature gradient, results in a non-uniform magnetic body force, which leads to a form of heat transfer called thermomagnetic convection. A magnet placed near the device will always attract the colder ferrofluid more than warmer. Viscous, two-dimensional, laminar and incompressible ferromagnetic fluid flow, under the influence of a ...
M. Hackert, G. Meichsner, and A. Schubert[1,2]
Micromanufacturing Technology, Chemnitz University of Technology, Chemnitz, Germany
Fraunhofer Institute of Machine Tools and Forming Technology, Chemnitz, Germany
Electrochemical Machining with a closed electrolytic free jet is a special procedure to generate complex micro structures by help of anodic dissolution. The work piece shape is fabricated by supplying an electrolytic current through an electrolyte jet ejected from a small nozzle. In this study COMSOL Multiphysics is used to simulate the electric current density in the jet and the dissolution ...