J. Knox, K. Kittredge, R.F. Coker, R. Cummings, C.F. Gomez
NASA - Marshall Space Flight Center, Huntsville, AL, USA
“NASA\'s Advanced Exploration Systems (AES) program is pioneering new approaches for rapidly developing prototype systems, demonstrating key capabilities, and validating operational concepts for future human missions beyond Earth orbit” . Under the new Atmosphere Revitalization Recovery and Environmental Monitoring (ARREM) project , efforts are focused on improving current ...
D. Rossi, P. Scotton
University of Padova, Department of Geosciences, Padova, Italy
The research aims to clarify some aspects of the thermo-fluid dynamics of woody biomass flue gas, within the twisted conduit inside the heat accumulation stoves, and exposes also some analysis about the heat transport and heat exchange processes. The high temperature flue gas flows in the conduit, releasing heat to the refractory. The heat stored in the refractory is then released to the ...
Improvement of a Steady State Method of Thermal Interface Material Characterization by Use of a Three Dimensional FEA Simulation in COMSOL
B. Sponagle, D. Groulx
Department of Mechanical Engineering, Dalhousie University, Halifax, NS, Canada
An FEA model of a steady state thermal interface material characterization apparatus was created in COMSOL Multiphysics 4.2a. This model was then fitted using three convection heat loss coefficients and the conductance of the TIM layer to a set of experimental measurements made using a steady state apparatus. It was shown that the model successfully matched the measured temperature values and ...
P. Keutelian, A. Krishnamurthy, G. Chen, B. Ulmen, G.H. Miley
University of Illinois at Urbana-Champaign, Champaign, IL, USA
HIIPER is an experimental space propulsion device using a helicon and an IEC as a plasma generation and acceleration stage, respectively. There is an experiment in progress, but for true rapid iteration and to model the performance of the engine, COMSOL is a strong candidate for fulfilling these roles and continuing with the project until its production phase. The simulation is built with very ...
B. Xu, M. Heydrich, S. Edmondson, A. Jahangir 
ShawCor Ltd., Toronto, ON, Canada
In oil and gas industries, electrical heaters are often used to control the internal pipe temperature. One important criterion for such test, is to maintain a uniform temperature range during the test. The objective of this study was to evaluate the heat transfer of one design of the internal electrical pipe heaters, by simulating both conduction and convection heat transfer around the heater ...
Numerical Study and Simulation in COMSOL Multiphysics of the Dilution Process during Dust Sampling in Dry Machining
B. Wenga-Ntcheping, A. Djebara, R. Kamguem, J. Kouam, V. Songmene
University of Quebec-École de Technologie Supérieure, Montreal, Canada
Dilution’s issue during dry machining have raised the interest’s environmental researchers and engineers. In fact, the sampling of dust emitted during dry machining was a serious problem for air quality evaluation at the workplace. Furthermore, the best sampling of fine and ultrafine particles produced during material cutting, passed through the dilution of high particle concentration ...
Finite Element Analysis of Induced Electroosmotic Flow in Brain Tissue and Application to ex vivo Determination of Enzyme Activity
Y. Ou, A. Rupert, M. Sandberg, S. Weber
University of Pittsburgh, Pittsburgh, PA, USA
University of Gothenburg, Gothenburg, Sweden
Ectopeptidases are commonly accepted to be a means of clearing active peptides. However, studies have shown that they can also regulate peptide activity. We have developed a technique of electrokinetic push-pull perfusion (Ek-PPP, Figure 1) to examine this largely unexplored mechanism of modulation of peptide function. We push the neuropeptide galanin through organotypic hippocampal slice ...
POWER Engineers, Hailey, ID, USA
The National Electrical Safety Code (NESC) requires that high voltage power lines in the U.S. be designed to limit electrostatic effects on nearby equipment. An example is that of a large vehicle underneath a transmission line. The tires insulate the vehicle’s body from ground. If a person standing on the ground makes contact with the vehicle surface, 60 Hz current can pass through the ...
N. Badi, R. Mekala
Department of Physics, Center for Advanced Materials, University of Houston, Houston, TX, USA
Department of Electrical & Computer Engineering, University of Houston, Houston, TX, USA
Thermally conducting but electrically insulating materials are needed for heat-sink LED lighting applications. We report on a cost effective and innovative method based on creating core-shell nanoparticles in polymer with aluminum (Al) nanoparticles as the high thermal conductivity core and ultrathin aluminum oxide (Al?O?) as a capping shell. The solid oxide shell around the Al core prevents ...
A COMSOL Model of Damage Evolution Due to High Energy Laser Irradiation of Partially Absorptive Materials
P. Joyce, J. Radice, A. Tresansky, J. Watkins
United States Naval Academy, Annapolis, MD, USA
In this paper we present a transient numerical model of the heat transfer and thermochemical damage evolution in an IR translucent material using COMSOL Multiphysics. The model is evaluated using literature supplied and experimentally determined material properties for carbon black laden PMMA (polymethyl-methacrylate). This variant of PMMA was chosen because it is homogeneous, isotropic, and the ...