Accession Number : AD0450873

Title :   THE APPROACH OF GAS BUBBLES TO A GAS/LIQUID INTERFACE,

Corporate Author : MCGILL UNIV MONTREAL (QUEBEC)

Personal Author(s) : Allan, R. S. ; Charles, G. E. ; Mason, S. G.

Report Date : 13 SEP 1960

Pagination or Media Count : 16

Abstract : The approach of nitrogen bubbles to the free surface of aqueous glycerol solutions and polyglycol oils was investigated using interference rings and interference colors to estimate the thickness of the liquid films. The rate of approach in close proximity to the liquid surface was found to decrease rapidly with decreasing separation. The intervening liquid film deformed with progressive thinning and, eventually, was thinnest around a ring at a distance c' from the center. Analysis showed that this occurred where the upper surface started to bulge. The rate of film thinning increased with decreasing film viscosity and showed good agreement with a theoretical previously derived. The rupture of the intervening liquid film occurred over a range of film t;icknesses in any given system, in many cases at values <900A. (Author)

Descriptors :   (*SURFACE PROPERTIES, GASES), (*LIQUIDS, SURFACE PROPERTIES), NITROGEN, BUBBLES, ALCOHOLS, GLYCOLS, FILMS, THICKNESS, MEASUREMENT, INTERFEROMETERS, VISCOSITY, SURFACE ACTIVE SUBSTANCES, CANADA.

Distribution Statement : APPROVED FOR PUBLIC RELEASE