Accession Number : AD0732770

Title :   Condensation of Ethanol by Homogeneous Nucleation and Droplet Growth Laws.

Descriptive Note : Rept. for 1968-1970,

Corporate Author : YALE UNIV NEW HAVEN CONN DEPT OF ENGINEERING AND APPLIED SCIENCE

Personal Author(s) : Wegener,Peter P. ; Clumpner,Joseph A. ; Wu,Benjamin J. C.

Report Date : SEP 1971

Pagination or Media Count : 47

Abstract : Condensation of ethanol by the homogeneous nucleation of liquid droplets has been studied in a supersonic nozzle. Continuous static pressure measurements along the nozzle centerline and light scattering measurements permit the condensation process to be resolved in detail. Nucleation rates found in the present work are in approximate agreement with previous results from diffusion and expansion cloud chambers. It is found that the classical theory with the assumptions of Dunning (1969) and Reiss (1970) predicts the experimental conditions of onset. The pressure variations beyond the onset point are used to study the droplet growth process. It is shown that a simple kinetic growth law with a constant condensation coefficient describes the condensation process very well. (Author)

Descriptors :   (*ETHANOLS, *CONDENSATION), (*NUCLEATION, ETHANOLS), SUPERSONIC FLOW, DROPS, REACTION KINETICS, MATHEMATICAL ANALYSIS, VAPOR PRESSURE, THEORY

Subject Categories : Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE