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Effect of natural convection on transition to turbulence in vertical pipes
Author(s) -
Scheele George F.,
Rosen Edward M.,
Hanratty Thomas J.
Publication year - 1960
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.5450380302
Subject(s) - natural convection , combined forced and natural convection , mechanics , turbulence , forced convection , convection , convection cell , rayleigh–bénard convection , flow (mathematics) , convective heat transfer , geology , materials science , thermodynamics , physics
The effect of natural convection on transition to a disturbed flow in a heat transfer section of a vertical pipe has been investigated. The transition is related to the distortions of the velocity profile caused by natural convection. When natural convection is in the direction of forced flow the transition appears to occur through the growth of small disturbances. Transition occurs suddenly when natural convection is opposite the direction of forced flow and it appears to be associated with a separation of the flow at the wall.