Accession Number : AD0724871

Title :   On Properties of Mature Severe Vortical Storms,

Corporate Author : TRW SYSTEMS GROUP REDONDO BEACH CALIF

Personal Author(s) : Dergarabedian,P. ; Fendell,F. E.

Report Date : 1971

Pagination or Media Count : 19

Abstract : Estimates of the maximum swirling speeds in fully developed violent atmospheric vortices are deduced from normally available data. For a tornado, knowledge of the ambient cloud deck height and the distance to which the funnel cloud tip has descended yields the maximum swirl; for a hurricane, a tephigram for the ambient atmosphere in which the storm was generated yields upper and lower bounds on the swirl speed. These calculations suggest that typical swirling speeds achieved rarely much exceed two hundred miles per hour. Since the Mach number is much less than unity, an incompressible model suffices for examining vortex dynamics. Then the boundary layer under a rapidly swirling vortex is numerically integrated by Galerkin's method to corroborate aspects of a novel structure for fully developed hurricanes proposed by Carrier. (Author)

Descriptors :   (*STORMS, *ATMOSPHERIC MOTION), TROPICAL CYCLONES, TORNADOES, VORTICES, VELOCITY, BOUNDARY LAYER, BOUNDARY VALUE PROBLEMS, BOUNDARY VALUE PROBLEMS, EQUATIONS OF MOTION

Subject Categories : Meteorology

Distribution Statement : APPROVED FOR PUBLIC RELEASE