Accession Number:

AD0677585

Title:

TURBULENT VELOCITY AND SCALAR SPECTRA IN STABLY STRATIFIED FLUIDS,

Descriptive Note:

Corporate Author:

BOEING SCIENTIFIC RESEARCH LABS SEATTLE WASH FLIGHT SCIENCES LAB

Personal Author(s):

Report Date:

1968-10-01

Pagination or Media Count:

10.0

Abstract:

From the complete set of two-point covariance equations for the turbulent velocity and temperature fields, the spherically averaged spectra in stably stratified fluids are deduced for the entire locally homogeneous ranges of wave numbers, including buoyancy, inertial, and viscous subranges. The spectral equations are closed with a similarity hypothesis Pao, 1965, 1968. The predicted spectral behavior in the buoyancy subrange can be summarized as follows 1 the spectra in weakly stable fluids agree in general, although differ in detail, with those predicted by Bolgiano 1959, Monin 1962, Shur 1962, and Lumley 1964, that the velocity spectra are steeper than k to the -53 power and the temperature spectra are less steep than k to the -53 power 2 in strongly stable fluids, both the velocity and the temperature spectra are wavy, which resemble certain spectral measurements in high altitude clear air turbulence Reiter and Burns, 1966 Pinus, Shur and Vinnichenko, 1966 Crooks, Hoblit and Prophet, 1967. Author

Subject Categories:

  • Atmospheric Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE