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Natural convective heat transfer from open vertical tubes
Author(s) -
Baird M. H. I.,
Legree B. A.
Publication year - 1994
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450720426
Subject(s) - mechanics , heat transfer , mixing (physics) , natural convection , convection , materials science , convective heat transfer , heat flux , convective mixing , heat transfer coefficient , dispersion (optics) , thermodynamics , optics , physics , quantum mechanics
Natural convection heat transfer in vertical tubes is described by a one‐dimensional dispersion model similar to that used previously for fluid mixing in the presence of an unstable density gradient. Temperature profiles have been measured in air in 2 m high insulated vertical tubes (21.3, 24.5, 27.7 cm internal diameter), closed at the bottom and open at the top, and heated at the bottom with a known heat flux. The effective mixing lengths for eddy heat transport are of the same order as the tube diameters.