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Measurement of Interstitial Heat Transfer Coefficient During Rapid Phase Change in Porous Media

[+] Author Affiliations
A. G. Agwu Nnanna

Purdue University Calumet, Hammond, IN

Paper No. IMECE2003-42431, pp. 139-144; 6 pages
doi:10.1115/IMECE2003-42431
From:
  • ASME 2003 International Mechanical Engineering Congress and Exposition
  • Heat Transfer, Volume 4
  • Washington, DC, USA, November 15–21, 2003
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 0-7918-3718-1 | eISBN: 0-7918-4663-6, 0-7918-4664-4, 0-7918-4665-2
  • Copyright © 2003 by ASME

abstract

An empirical correlation for the estimation of interstitial heat transfer coefficient during rapid phase change in porous media has been developed. During the phase change process, it is expected that the temperature of the solid matrix encapsulating the pore will be higher than the temperature of the pore materials during melting and lower during freezing. In this study, the solid matrix temperature is experimentally measured at pre-selected sites, and the mean temperature of the pore material is analytically computed. Based on the solid matrix and pore temperature data, the interstitial heat transfer coefficients was developed and the result is presented in dimensionless form as Nusselt number as a function of Fourier number (Nusf = CeγFop ). Results show that the interstitial heat transfer coefficient depends on the pore size, the thermal diffusivity, the latent heat of fusion, and the mean heat capacitance of the pore.

Copyright © 2003 by ASME

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