
Accession Number : AD0726185
Title : Numerical Studies of Convection Currents at the Ocean's Surface Caused by Evaporation, Radiation and Atmospheric Cooling.
Descriptive Note : Final technical rept.,
Corporate Author : NOTRE DAME UNIV IND DEPT OF AEROSPACE AND MECHANICAL ENGINEERING
Personal Author(s) : Piacsek,Steve A.
Report Date : NOV 1970
Pagination or Media Count : 80
Abstract : Numerical experiments were performed on convective flows that arise at the ocean's surface undergoing evaporation, longwave backradiation and atmospheric cooling. Two specific problems were treated, with greatly different characteristic length scales. To simulate largescale motions, convection currents have been treated that arise when fluid in a rectangular geometry is rotated with constant angular velocity and cooled with uniform heat flux both from above and below. For Rayleigh number of about 28,000 and Taylor number about 10,000, the time development of the meansquare vorticity components showed equipartition for circulations in all planes. An examination of the horizontal platforms of motion revealed the existence of a weak, fourlobed jet stream meandering around four centers of strong, closed cyclonic circulations. To simulate smallscale motions, twodimensional, penetrative thermohaline convection was studied for situations which correspond to evaporative cooling of a stably stratified liquid. (Author)
Descriptors : (*OCEAN CURRENTS, CONVECTION(HEAT TRANSFER)), EQUATIONS OF MOTION, SURFACE PROPERTIES, COOLING, WIND, SHEAR STRESSES, ROTATION, SALINITY, EVAPORATION, KINETIC ENERGY, STABILITY
Subject Categories : Physical and Dynamic Oceanography
Distribution Statement : APPROVED FOR PUBLIC RELEASE