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Simultaneous heat and mass transfer in free convection boundary layers
Author(s) -
Saville D. A.,
Churchill S. W.
Publication year - 1970
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690160220
Subject(s) - prandtl number , schmidt number , turbulent prandtl number , film temperature , magnetic prandtl number , boundary layer , laminar flow , mechanics , convection , infinity , mathematics , classical mechanics , mathematical analysis , physics , thermodynamics , nusselt number , reynolds number , turbulence
Expressions are derived for the heat and mass transfer coefficients for laminar free convection driven by simultaneous differences in temperature and composition for the asymptotic cases of equal Schmidt and Prandtl numbers approaching zero, equal Schmidt and Prandtl numbers approaching infinity, Schmidt number approaching infinity and Prandtl number approaching zero, and Schmidt number larger than Prandtl number and Prandtl number approaching infinity. The results are applicable for horizontal cylinders or vertical axisymmetric bodies with arbitrary body contours insofar as the approximations of boundary‐layer theory are valid. The results compare favorably with existing solutions and experimental results for particular conditions.