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ISSN Online: 2377-424X

ISBN Print: 0-89116-130-9

International Heat Transfer Conference 6
August, 7-11, 1978, Toronto, Canada

NUCLEATION OF BUTANE DROPS IN FLOWING WATER

Get access (open in a dialog) DOI: 10.1615/IHTC6.4030
pages 55-60

Sinopsis

An experimental study is presented here of the nucleation of a train of butane drops rising through a downward flowing stream of cold water. High speed photographs of the nucleation process were taken and measurements made of the rise velocities of the bubbles and the fraction of butane drops that were nucleated before reaching the top of the water column for temperature differences ΔT,between the water and butane, ranging between 1.5 К and 16.5 K. Plots of the fraction F of nucleating drops versus residence time with ΔT as a parameter are presented and it is found that while ΔТ has a significant effect, the presence of neighbouring nucleating drops appears to have an even stronger effect. A theory, applicable over a limited range of ΔT, is suggested for the nucleation of the drops, with allowance for neighbouring drops, leading to the semi-empirical equation relating F to the residence time τ and a function δ of ΔT, viz.,
-ln(l-F)=(0.00135e-0.242×1082 +0.100Fe-0.242×108/4δ2) τ The implications of this equation are explored.