Accession Number : AD0697109

Title :   A DIMENSIONLESS SOLUTION FOR THE WIND AND TEMPERATURE PROFILES IN THE SURFACE BOUNDARY LAYER,

Corporate Author : ATMOSPHERIC SCIENCES LAB WHITE SANDS MISSILE RANGE N MEX

Personal Author(s) : Hansen,Frank V. ; Serna,Juana

Report Date : SEP 1969

Pagination or Media Count : 178

Abstract : The shape of the wind and temperature profiles in the surface boundary layer of the atmosphere for thermally stratified flow is presented as dimensionless parameters. The development of the hypothesis follows dynamic similarity as applied to the atmosphere near the earth's surface. The approach used for thermally stratified unstable flow assumes the scaling ratio, z/L, is numerically equivalent to the gradient Richardson number, Ri. In stable air, z/L is taken as a function of Ri. The Richardson number is considered to be the sole controlling parameter of similarity in the surface boundary layer over a large stability range from approximately Ri = -5.0 to Ri = 0.204. A Richardson number of 0.204 is taken to be the nominal critical value at which turbulence experiences a complete decay and denotes the onset of undulance. (Author)

Descriptors :   (*ATMOSPHERIC MOTION, BOUNDARY LAYER), THERMAL STABILITY, TURBULENT BOUNDARY LAYER, NUMERICAL METHODS AND PROCEDURES, WIND, ATMOSPHERIC TEMPERATURE, FLOW FIELDS, STRESSES, HEAT FLUX, NUMERICAL INTEGRATION, TABLES(DATA)

Subject Categories : Atmospheric Physics
      Meteorology

Distribution Statement : APPROVED FOR PUBLIC RELEASE