Accession Number : AD0716362

Title :   The Role of Electrical Forces in the Development and Dissipation of Clouds and Fogs.

Descriptive Note : Final technical rept.,

Corporate Author : UNIVERSITY OF MANCHESTER INST OF SCIENCE AND TECHNOLOGY (ENGLAND) DEPT OF PHYSICS

Personal Author(s) : Latham,John ; Smith,M. H.

Report Date : NOV 1970

Pagination or Media Count : 43

Abstract : The purpose of the study was to determine whether the disruption of freely falling drops, principally by electrical forces, could initiate freezing; to establish the physical basis of this phenomenon; and to assess its meteorological relevance. From the experimentation it was concluded that the freezing of supercooled drops may be facilitated by disruption of the drop in an electric field and is not dependent upon the presence of a support. The passage of a spark to the drop at the time of disruption does not appear significantly to affect the nucleation process. Experiments were also performed in which falling supercooled drops were disrupted by means of an air jet in the absence of electrical forces. Photographs obtained in the same manner as in the primary experiments provided no evidence for the presence of ice in the drops, but these studies were too cursory to be definitive. (Author)

Descriptors :   (*CLOUDS, SUPERCOOLING), (*FOG, REMOVAL), DROPS, NUCLEATION, ELECTRIC FIELDS, TEST METHODS, PHOTOGRAPHS, ICE, GREAT BRITAIN

Subject Categories : Meteorology

Distribution Statement : APPROVED FOR PUBLIC RELEASE