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Phase Change Material Particulate Flow Through a Rectangular Channel: Effect of Parachute-Shaped Particles on the Heat Transfer

[+] Author Affiliations
Laura Small, Fatemeh Hassanipour

University of Texas at Dallas, Dallas,TX

Paper No. ICNMM2011-58158, pp. 515-521; 7 pages
doi:10.1115/ICNMM2011-58158
From:
  • ASME 2011 9th International Conference on Nanochannels, Microchannels, and Minichannels
  • ASME 2011 9th International Conference on Nanochannels, Microchannels, and Minichannels, Volume 1
  • Edmonton, Alberta, Canada, June 19–22, 2011
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 978-0-7918-4463-2
  • Copyright © 2011 by ASME

abstract

This study presents numerical simulations of forced convection with parachute-shaped encapsulated phase-change material particles in water, flowing through a square cross-section duct with top and bottom iso-flux surfaces. The system is inspired by the gas exchange process in the alveolar capillaries between the red blood cells (RBC) and the lung tissue. The numerical model was developed for the motion of elongated encapsulated phase change particles along a channel in a particulate flow where particle diameters are comparable with the channel height. Results of the heat transfer enhancement for the parachute-shaped particles are compared with the circular particles. Results reveal that the key role in heat transfer enhancement is the snugness movement of the particles and the parachute-shaped geometry yields small changes in heat transfer coefficient when compared to the circular ones. The effects of various parameters including particle diameter and volume-fraction, as well as fluid speed, on the heat transfer coefficient is investigated and reported in this paper.

Copyright © 2011 by ASME

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