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Multiphase Science and Technology
SJR: 0.124 SNIP: 0.222 CiteScore™: 0.26

ISSN Imprimir: 0276-1459
ISSN On-line: 1943-6181

Multiphase Science and Technology

DOI: 10.1615/MultScienTechn.v12.i3-4.130
18 pages

A NOTE ON THE BUBBLE GROWTH FORCE

Cees W. M. van der Geld
Department of Mechanical Engineering, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands

RESUMO

A boiling bubble at the verge of detaching from a plane, infinite wall experiences a hydrodynamic force due to its expansion, Fx. Such a bubble is modelled as a pair of spheres with radius R and growth rate R' in inviscid liquid, and Fx is computed using the Lagally theorem. The form of the Lagally theorem used differs in one term from an expression found in the literature. The exact expression for Fx is simplified in order to derive a simple expression that facilitates the prediction of detachment. In the case of diffusion controlled bubble growth, Fx is shown to be approximately given by c2πρLR2R'2, where ρL is the liquid mass density and c2 ~ 1.11. This prediction is compared with experimental fits of the literature.


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