Advertisement

Natural Convection Film Boiling on a Sphere

  • T. H. K. Frederking
  • J. A. Clark
Conference paper
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 8)

Abstract

Immersing a solid into a liquid produces film boiling if the surface temperature is above the Leidenfrost point, Aside from cryogenic applications, metallurgists have tested the cooling abilities of liquids by dropping a hot sphere or other bodies into a liquid bath [1]. The boundary layer type of film boiling can be easily analyzed for steady state conditions if the film is laminar. This analysis also may be applied to a transient test if the change in enthalpy of the vapor film is much smaller than that of the solid, as it is in the tests described later. Therefore when “slow” cooling takes place with respect to the vapor film, quasi-stationary film boiling may be assumed to occur and be so described analytically. An analysis is presented in which a diffusion approximation is made by linearizing the governing equations. The approximate result serves as a guide to a generalized correlation of film boiling heat transfer data.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    W. Stenzel and G. R. Schultze, Chemie-Ingenieur-Technik, Vol. 30, 643 (1958).CrossRefGoogle Scholar
  2. 2.
    W. Nusselt, Z. VDI, Vol. 60, 541, 569 (1916).Google Scholar
  3. 3.
    R. Hermann, “Heat Transfer by Free Convection from Horizontal Cylinders in Diatomic Gases,” NACA TM 1366 (1954).Google Scholar
  4. 4.
    H. Merte and J. A. Clark, Advances in Cryogenic Engineering, Vol. 7, K. D. Timmerhaus (ed.), Plenum Press, New York (1962), p. 546.CrossRefGoogle Scholar
  5. 5.
    J. Ružička, Problems of Low-Temperature Physics and Thermodynamics, Pergamon Press, New. York (1959), p. 323.Google Scholar
  6. 6.
    Y. Y. Hsu and J. W. Westwater, J. A.I.Ch.E., Vol. 4, 58 (1958).CrossRefGoogle Scholar
  7. 7.
    L. A. Bromley, Chem. Engr. Prog., Vol. 46, 221 (1950).Google Scholar
  8. 8.
    W. H. McAdams, Heat Transmission, 3rd ed., McGraw-Hill Book Co., New York (1954), p. 172.Google Scholar

Copyright information

© Springer Science+Business Media New York 1963

Authors and Affiliations

  • T. H. K. Frederking
    • 1
  • J. A. Clark
    • 2
  1. 1.University of CaliforniaLos AngelesUSA
  2. 2.University of MichiganAnn ArborUSA

Personalised recommendations