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 ...
Simulation Studies on Stress Generation and Volume Expansion due to Electrochemical Lithium Insertion in a Silicon Nanowire
G. Sikha, and J. Gordon
Applied Materials, Inc.
Santa Clara, CA
Silicon electrodes are presently being pursued as the potential negative electrode for lithium-ion batteries owing to its high gravimetric (mAh/g) and volumetric capacity (mAh/L) compared to the existing state of the art graphite electrode. Recent experimental studies have demonstrated the use of nano size Si electrodes which minimizes insertion induced stresses due to facile strain ...
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.
Heat Generation from H₂/D₂ Pressurization of Nanoparticles: Simulation of the Experiments on COMSOL Multiphysics®
A. Osouf, G. Miley, B. Stunkard, T. Patel, E. Ziehm, K. Kyu-Jung, A. Krishnamurthy
Department of Aerospace Engineering, University of Illinois at Urbana - Champaign, Urbana, IL, USA
Department of Nuclear, Plasma & Radiological Engineering, University of Illinois at Urbana - Champaign, Urbana, IL, USA
University of Illinois at Urbana - Champaign, Urbana, IL, USA
A COMSOL Multiphysics® model of our apparatus has been created in order to simulate the pressurizations of our nanoparticles by Deuterium. Using reference measurements during a cooling process, we calibrated the model so that its thermal aspects reflect the ones of our experimental set up. To reproduce the pressurizations, the following variables are parameters : the location of the heat ...
N. Khoshnevis Gargar, A. Mailybaev, D. Marchesin, H. Bruining
 Delft University of Technology, Delft, The Netherlands
 Instituto Nacional de Matematica Pura e Aplicada, Rio de Janeiro, Brazil
One of the methods to recover oil from medium and low viscosity in complex reservoirs uses air injection leading to oil combustion. In this case the oxygen in the air burns the heavier components of the oil, generating a heat wave leading to vaporization of lighter components. The combustion mechanisms are different for light oils, where evaporation is dominant, whereas for medium non-volatile ...
D. Groulx, A. Bharath, S. Campbell
Department of Mechanical Engineering, Dalhousie University, Halifax, NS, Canada
The field of underwater acoustics research is constantly growing with the ongoing improvement of acoustic measuring techniques. An acoustic hydrophone receiver is a passive listening device which is widely used in biological research and sonar technology. The hydrophone however suffers from turbulence generated noise created by its presence in ever faster flow. This work aims to analyze the ...
Thermal Study of Valve Regulated Lead Acid Batteries and Electronics Chamber Used in Stand-Alone Street Lighting Applications
D. Groulx, J. Skaalum, T. Jamieson
Mechanical Engineering, Dalhousie University, Halifax, NS, Canada
This paper presents a study on the heat generation of Valve-Regulated Lead Acid (VRLA) batteries used in off-grid streetlighting applications from PoleCo, a Halifax based company. One goal of the project was to produce validated COMSOL® models of the enclosure that holds these VRLA batteries. This model can then be used to investigate methods of reducing the temperature of the batteries based on ...
S. Yushanov, J. S. Crompton, K. C. Koppenhoefer
AltaSim Technologies, LLC., Columbus, OH, USA
This study analyzed the laser powder bed additive manufacturing process. The laser is modeled as a moving heat source with time dependent heat transfer causing local, transient melting of the metal powder. Heat transfer is considered to take place due to convection in the molten metal pool, solidification of molten metal and conduction, convection and radiation to the surrounding environment. ...
R. P. Ruby, G. Kulkarni, U. Kanade
Noumenon Multiphysics Pvt. Ltd., Pune, Maharashtra, India
Oneirix Engineering Laboratories Pvt. Ltd., Pune, Maharashtra, India
Seals or gaskets that are compressed between walls of a container are important to many industrial applications. Understanding the performance of such seals requires an understanding of the microscopic geometry of the sealing surfaces, because the fluid seeps around the undulations of such surfaces. This paper presents strong computational evidence that the microgeometry of such surfaces depends ...
Z. Umar, D. Ledwoch, L. Komsiyska, S. Vasić[
EWE-Forschungszentrum für Energietechnologie e. V, Oldenburg, Germany
In general battery cells are charged/discharged using constant current or constant power expressed as C-Rates and P-Rates respectively. We are developing a single cell-level Li-Ion battery model in order to simulate the performance and the physicochemical phenomena under power discharging mode (P-Rate). The P-Rate is defined as the measure of the rate at which a battery charges/discharges ...