Statistical properties of optical refractive index fluctuations in the marine boundary layer |
| |
| Authors: | R A Antonia A J Chambers C A Friehe |
| |
| Institution: | (1) Department of Mechanical Engineering, University of Newcastle, 2308 Newcastle, N.S.W., Australia;(2) Department of Applied Mechanics and Engineering Sciences, University of California, 92093 San Diego, La Jolla, California, USA |
| |
| Abstract: | The optical refractive index fluctuation has been determined from measurements of turbulent temperature and humidity fluctuations in the atmospheric surface layer over the ocean. Probability density, spectral density and even- and odd-order structure functions of the refractive index fluctuation are presented. The spectral density exhibits a significant  -5/3 inertial subrange as a result of the existence of a -5/3 subrange in the spectra of temperature and humidity fluctuations and in the temperature-humidity co-spectrum. The behaviour in the inertial subrange of fourth- and sixth-order structure functions of the refractive index is in reasonable agreement with that predicted by the analysis of Antonia and Van Atta (1975, 1978). The third-order structure functions of the refractive index exhibit an approximately linear dependence on separation in the inertial subrange, in agreement with a ramp model for the large coherent structure of the motion. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
