Accession Number : AD0616315

Title :   MOVEMENT OF WATER IN A FILM BETWEEN GLASS AND ICE,

Corporate Author : COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H

Personal Author(s) : Hoekstra,Pieter ; miller,R. D.

Report Date : MAY 1965

Pagination or Media Count : 13

Abstract : The properties of the film between glass and ice were studied by (1) investigating the influence of particle size on the repulsion and trapping of glass particles by a growing ice surface, and (2) measuring the migration of glass particles embedded in ice. The transport of material in the thin film between the glass and ice is common to both types of experiments. It is assumed that the driving force for the movement of water molecules is proportional to the free-energy gradient. The experimental arrangement and apparatus are described. The process by which glass particles are carried upward by an advancing ice front is shown to be controlled by the transport of water in the film between the glass and the ice. A relationship, derived on the assumption that the transport is by diffusion, predicts the influence of the rate of advance of the ice on the size of the largest particle carried by the ice. The movement rate of particles embedded in ice resulting from a temperature gradient is mainly determined by the thickness of the unfrozen film between the glass and the ice. The thickness of the film decreases rapidly with temperature. (Author)

Descriptors :   (*LAMINAR FLOW, WATER), (*WATER, FILMS), (*ICE, SURFACE PROPERTIES), GLASS, SOILS, DIFFUSION, TRANSPORT PROPERTIES

Distribution Statement : APPROVED FOR PUBLIC RELEASE