J. Wiswell , M. Guvench ,
 University of Southern Maine, Gorham, ME, USA
Introduction: In this project, COMSOL Multiphysics® and SolidWorks® are employed to model and simulate a mechanically coupled MEMS resonator with varying masses. These resonators consist of three main components: springs on each end to allow the structure to move, a shuttle mass for loading the structure, and electrode fingers attached to the shuttle mass to electrically detect resonance. The ...
R. Painter , L. Sharpe , S. K. Hargrove ,
 Department of Civil Engineering, Tennessee State University, Nashville, TN, USA
 Department of Mechanical Engineering, Tennessee State University, Nashville, TN, USA
In this study, a three-dimensional (3-D) phase field model was developed to better understand the parameters impacting the LiFePO4 cathode material in lithium ion batteries. LiFePO4 has a strong tendency to separate into stable high Li+ concentration and low Li+ concentration phases, resulting in the batteries characteristic wide voltage plateau at room temperature. The COMSOL model equations ...
L. Tong ,
 Keisoku Engineering System Co., Ltd., Tokyo, Japan
Pulsed DC technology has led to the design of cost-effective deposition systems and to improved film properties, compared to conventional rf systems. In this work, a two-dimensional finite element model is used to investigate the high frequency pulsed DC discharges in nitrogen. The study is performed using the Plasma Module of COMSOL Multiphysics@. The densities of all the plasma species are ...
Numerical Simulation of Pool Film Boiling Heat Transfer during Quenching of Heated Cylindrical Rods - new
S. Ebrahim , F. B. Cheung , A. Alshayji ,
 Department of Mechanical and Nuclear Engineering, Pennsylvania State University, University Park, PA, USA
 Department of Mechanical Engineering, College of Engineering and Petroleum, Kuwait University, Kuwait
This research studies possible ways to mitigate failure of a nuclear reactor, in which the coolant supply to the nuclear core has been compromised, known as Loss of Coolant Accident (LOCA). One possible way to decrease the severity of the incident is to quickly quench the fuel rods in water. The heat transfer and hydrodynamic mechanisms involved in this quenching process are numerically ...
K. Koppenhoefer , J. Thomas , L. Gritter , J. S. Crompton , T. Tower ,
 AltaSim Technologies, Columbus, OH, USA
 Kimberly-Clark, Inc., Neenah, WI, USA
The process of cold drawing a fiber over rollers is analyzed in this work to predict the temperature rise due to the heat generated during plastic deformation of the fiber. Experimental measurements on prototypes indicated an unacceptable temperature rise of greater than 100 F requiring identification of process modifications to reduce the temperature rise to an acceptable level. A ...
E. S. Vasquez ,
 Department of Chemical and Materials Engineering, University of Dayton, Dayton, OH, USA
Transport Phenomena in Chemical Engineering involves three key aspects: Momentum, Heat and Mass Transport. These areas are described by differential equations which are solved for a particular problem using independent or a set of combined equations (e.g., water flowing in a heated pipe). At an undergraduate level class, the advanced mathematics of partial differential equations, tensors and the ...
The Effect of Fuel and Oxidant Pumping on the Performance of a Membraneless Microfluidic Fuel Cell - new
A. F. Tayel , M. A. Fathallah , M. M. Elsayed ,
 Department of Mechanical Engineering, Alexandria University, Alexandria, Egypt
For the commercialization of membraneless microfluidic fuel cell, voltage and minimum power demand for various applications need a precise selection of fuel and oxidant flow rates to achieve the optimum cell performance. A numerical study on a membraneless microfluidic fuel cell was made to determine the effect of Peclet (Pe) number on the overall performance of the fuel cell. A model of 1 mm ...
Broadband Polarization-Independent and Wide-Angle Metasurface for Radar Cross Section Reduction - new
A. Vora , S. Joshi , D. Guney ,
 Michigan Technological University, Houghton, MI, USA
 Touro College, New York, NY, USA
In the past few years, metamaterial perfect absorbers (MPA) have been extensively studied due to their incredible ability to manipulate electromagnetic waves and provide a broadband, polarization-independent, and wide-angle response for a host of applications. The need for high-performance terahertz regime MPA is increasing for both the commercial and the military applications to provide ...
Multiphysics Modeling of Engineered Structured Sorbents for the Adsorption of Carbon Dioxide and Water Vapor from Manned Spacecraft Atmospheres
NASA, Huntsville, AL, USA
In NASA’s Vision for Space Exploration, humans will once again travel beyond the confines of earth’s gravity, this time to remain there for extended periods. Thus all spacecraft systems, including those for the separation of metabolic carbon dioxide and water from a crewed vehicle, must be minimized with respect to mass, power, and volume. This paper describes efforts to improve on ...
C. Bouchot, and M.A. Valenzuela
Instituto Politécnico Nacional-ESIQIE, México D.F, México
A general purpose stainless steel micro reactor setup for methane conversion is being designed for research purposes. We intend to design and build a modular device that would be able to manage different types of reactions depending on the installed modules. The device should be able to allow the study of gas phase reactions at low (atmospheric) and high pressures (up to 20 MPa), with the ...