L. Desgrosseilliers, and D. Groulx
A cornerstone of Chemical and Mechanical Engineering undergraduate programs the world over is the experimental and theoretical study of heat exchange. Graduating engineering students gain some appreciation in their lab course by comparing empirical correlations combined with the thermodynamics of heat exchange with the real operation of a counter-current, double pipe, single-phase heat exchanger.
I. Bodey, R. Arimilli, and J. Freels
Dept. of Mechanical, Aerospace and Biomedical Eng., The University of Tennessee, Knoxville, TN
Research Reactors Division, Oak Ridge National Laboratory, Oak Ridge, TN
The High Flux Isotope Reactor (HFIR) at the Oak Ridge National Laboratory (ORNL) is an 85 MW, light-water moderated, research reactor that operates at low temperature and high pressure. The HFIR is presently scheduled to convert from a high enriched uranium fuel (HEU) to a low enriched uranium fuel (LEU) in 2019. Due to cost constraints, not all experiments will be repeated for the LEU fuel ...
Sequential Estimation of Temperature-Dependent Thermal Diffusivity in Cherry Pomace during Nonisothermal Heating
I. Greiby, D. Mishra, and K. Dolan
Dept. of Biosystems & Agricultural Eng., MSU, East Lansing, MI
Dept. of Biosystems & Agricultural Eng., MSU, East Lansing, and Nestle Nutrition, PTC Fremont, MI
Dept. of Biosystems & Agricultural Eng. and Dept. of Food Science & Human Nutrition, MSU, East Lansing
Fruit and vegetables are a rich source of many bio-active compounds from which value-added nutraceuticals can be produced. To design processes for these solids that will maintain food safety and maximize quality over a large temperature range, temperature-dependent thermal properties are needed. The objective of this work was to estimate temperature and moisture-dependent thermal diffusivity of ...
O. Yildirim, and Z. Guo
Intellectual Ventures Laboratories
Regenerative heat exchangers (RHX) find widespread applications in liquid food or pharmaceutical processing as well as in reaction engineering. Whereas \"large\" RHX systems have been in use for a long time, their smaller micro-channel counterparts are a more recent area of interest. Here, we describe the design and development of a novel micro-channel counter-current regenerative heat ...
S. Boukhris, M. Denton, and Y. Feng
Computational Bioengineering and Control Lab, University of Texas at San Antonio, San Antonio, TX
TASC, Inc. Biomedical Sciences and Technology Dept., Ft. Sam Houston, TX
The use of lasers in the military and everyday life is growing each year. The purpose of the current research is to take full advantage of this new spatially-resolved thermal data to construct a mathematical and numerical model for laser-induced damage using COMSOL Multiphysics. The microthermography data were extracted for vertical and horizontal lines through the laser-exposed area of cell ...
A. Roday, and P. Nicosia
Garlock Sealing Technologies
Sintering is an important step in the manufacturing of polytetrafluoroethylene (PTFE) billets. The challenge in heating large billets stems from the inherent low thermal conductivity of PTFE. Existing literature suggests determining maximum heating rate experimentally using recommended guidelines. This paper uses COMSOL to aid in optimizing the temperature profile required for a particular ...
Microwave Drying of Cellular Ceramic Substrates: A Conjugate Modeling Approach to Understand Surface Moisture Migration
A. Halder, and J. George
Painted Post, NY
Microwave drying processes are critical components in the manufacture of cellular ceramic substrates and filters. The objective of this study is to develop a comprehensive model at a small scale and include all the possible physics that are important during microwave drying processes. Based on the results, conclusions are made on the importance of different factors in drying.
E. Javier, J. Alberto Bava, and G. Rodriguez
Facultad de Ingenieria Universidad Nacional de La Plata, La Plata, Buenos Aires, Argentina.
Facultad de Astronomia y Ciencias Geofisicas Universidad Nacional de La Plata, La Plata, Buenos Aires, Argentina.
This paper describes the development of a thermal model applied to a radiosonde system that calculates the average temperature on the printed circuit board PCB of the system. Using the thermal physics module called \"Conjugated Heat Transfer” of the COMSOL utility, simulations are performed which allow modeling the atmospheric conditions of the environment that the radiosonde will be ...
R. Tosh, and H. Chen-Mayer
Accurate metrology of radiotherapeutic absorbed dose to water requires assessing the radiation induced temperature change. The most direct method for doing this is water calorimetry, for which the established technique involves the use of slender thermistor probes that are sealed within a glass vessel containing high-purity water. The probes and vessel perturb the radiation field, via ...
Solution of Inverse Thermal Problem for Assessment of Thermal Parameters of Engineered H2 Storage Materials
I. Fedchenia, and B. van Hassel
United Technologies Research Center
East Hartford, CT
Materials based H2 storage systems for light duty vehicles need to meet challenging performance targets that have been developed by the FreedomCAR and Fuel Partnership. On-board reversible metal hydrides are typically integrated with heat transfer surfaces, e.g. in fin and tube heat exchangers, in order to reject the heat of H2 absorption at a high rate which is set by the refueling time ...