Growth and Collapse of Bubbles in Nucleate Boiling

概要

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A number of theoretical and experimental studies on the growth and collapse of bubbles have been made in order to clarify the boiling phenomena. Most of those experiments, however, have been made with heating surfaces of smaller size than bubble diameter. Authors have been doubtful of the validity of applying such experimental results to boiling with a larger heating surface. In order to clarify the dependence of the bubble growth and collapse upon the shape and size of heating surface, they carried out experiments by means of the heating surfaces of horizontal circular brass plates 100 mm and 140 mm in diameter respectively and of horizontal small platinum wire 0.5 mm in diameter and found that : (1) Bubble growth and collapse are independent of heat flux. (2) Bubble collapse is strongly influenced by the degree of subcooling. (3) Bubble growth and collapse which essentially dominate the boiling heat transfer are considerably affected by the size of heating surface.
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