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Growth rates of hemispherical bubbles in nucleate boiling of liquid metals

Authors
Journal
Chemical Engineering Science
0009-2509
Publisher
Elsevier
Publication Date
Volume
31
Issue
3
Identifiers
DOI: 10.1016/0009-2509(76)85056-7

Abstract

Abstract In nucleate boiling of liquid metals on heated surfaces, the rapid growth of the bubbles indicates that they are hemispherically shaped for a considerable portion of their total growth. This paper presents the development of a simple general relation for predicting the growth rate as a function of bubble size (or time), pressure, superheat, and thermal properties of both the heater wall and the liquid metal. The solution takes both inertia and heat-transfer effects into account, although it is found that in many situations the former predominate for most of the growth period. Heat transfer from both the solid heating surface and the hemispherical interface are also taken into account, and it is found that in a typical case the two rates are comparable.

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