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Natural Convection With Porous Medium in a Narrow Horizontal Cylindrical Annulus With Constant Heat Generation

[+] Author Affiliations
Kamyar Mansour

Amirkabir University of Technology, Tehran, Iran; Flow Research and Engineering, Cupertino, CA

Paper No. FEDSM-ICNMM2010-30114, pp. 585-590; 6 pages
  • ASME 2010 8th International Conference on Nanochannels, Microchannels, and Minichannels collocated with 3rd Joint US-European Fluids Engineering Summer Meeting
  • ASME 2010 8th International Conference on Nanochannels, Microchannels, and Minichannels: Parts A and B
  • Montreal, Quebec, Canada, August 1–5, 2010
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 978-0-7918-5450-1 | eISBN: 978-0-7918-3880-8
  • Copyright © 2010 by ASME


We consider the two-dimensional problem of steady natural convection in a narrow horizontal cylindrical annulus filled with porous medium due to a constant temperature variation on the outer and adiabatic conditions at the inner boundaries with constant volumetric heat flux. The solution is expanded in powers of a single combined similarity parameter, which is the product of the gap ratio to the power of two, and Rayleigh number. The series is extended by means of symbolic calculation up to 28 terms. Analysis of these expansions allows the exact computation for arbitrarily accuracy up to 50000 figures. Although the range of the radius of convergence is small, but Pade approximation leads our results to be good even for much higher value of the similarity parameter.

Copyright © 2010 by ASME



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