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Turbulence effect on direct‐contact heat transfer with change of phase: Effect of mixing on heat transfer between an evaporating volatile liquid in direct contact with an immiscible liquid medium
Author(s) -
Sideman Samuel,
Barsky Zvi
Publication year - 1965
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.690110332
Subject(s) - mixing (physics) , thermodynamics , turbulence , heat transfer , isotropy , mechanics , chemistry , boiling , dispersion (optics) , materials science , optics , physics , quantum mechanics
The concept of local isotropy in turbulent agitation together with the particular characteristics of volatile drops evaporating while in dispersion were used to derive a simple and practical correlation relating the specific power input with the temperature driving force and the heat flow rates for all conceivable mixing regimes. The correlation was verified by experiments which indicate that dilute evaporating dispersions are controlled by viscous shear stresses. The generality of the proposed correlation is demonstrated by its application to pilot plant and laboratory data obtained over a wide range of turbulent mixing intensities. At its lower limit the correlation reduces to the well‐known relationship of surface‐boiling heat transfer.