Entrainment of air into liquids by a high speed continuous solid surface

R. Burley, R. P S Jolly

Research output: Contribution to journalArticle

Abstract

The paper reports a wide range of experimental data on air entrainment velocities and apparent dynamic contact angles, were a continuous surface enters. The main dimensional correlation took the form: {A figure is presented} for variables in the range: {A figure is presented} However, due to the limited range of fluid densities used (0.785-1.26 * 103kg.m3), a simpler correlation for air entrainment velocity was found {A figure is presented} for the case of the entrainment of air by a plunging solid surface where 0.2 <(?s/?9u)>< 3.2m.sec-1 was found to be the corresponding r. The critical capillary number Cac was found to lie in the range 0.2 <Cac< 1.26 which agrees very well with a recent study due to Gu. The investigation also showed that anomalous behaviour could occur with charged surfaces or surfaces with significant roughness. Surfactant type was al. © 1984.

Original languageEnglish
Pages (from-to)1357-1372
Number of pages16
JournalChemical Engineering Science
Volume39
Issue number9
Publication statusPublished - 1984

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