Accession Number : ADP001023

Title :   Viscous Flow of a Droplet on a Flat Surface,

Corporate Author : WISCONSIN UNIV-MADISON MATHEMATICS RESEARCH CENTER

Personal Author(s) : Drew,Donald A.

Report Date : FEB 1983

Pagination or Media Count : 13

Abstract : Removal of droplets of a viscous fluid from a surface is important to dishwashing and decontamination. A person familiar with washing dishes knows that the task is impossible without a detergent, but also realizes that some mechanical motion is important. Soaking, even in a good detergent, is not enough. The authors focus their attention on the motion of a viscous drop subject to the forces applied to it by another fluid. This corresponds to the action of the typical mechanical dishwasher, which uses jets of water, as opposed to the use of a hand-held cloth, or sponge. The cleaning is fluid-mechanical, as opposed to solid-mechanical or chemical or thermal. They consider the motion of a drop of an incompressible viscous fluid on a flat surface subject to the flow of another inviscid fluid around it. The viscous drop is assumed to be so thin that the flow inside the drop is lubrication flow, and the presence and motion of the drop does not disturb the flow of the outer inviscid fluid. The effects of gravity and surface tension will be assumed to be small compared with the viscous forces. (Author)

Descriptors :   *FLUID FLOW, *FLUID MECHANICS, *EQUATIONS, *VISCOUS FLOW, *DOORS, SURFACES, INTERACTIONS, INCOMPRESSIBLE FLOW, WATER JETS, INVISCID FLOW, DECONTAMINATION, CLEANING, DISHWASHING COMPOUNDS, WATER JETS

Distribution Statement : APPROVED FOR PUBLIC RELEASE