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Some characteristics of relative particle dispersion in the atmosphere's boundary layer
Abstract The vertical, along- and cross-wind components of the relative positions and velocities of tetroon pairs are used to determine the auto- and cross-correlation functions, power- and cross-spectra as well as the relative displacement tensor. It is found that, for all three components of the relative velocity, the power-spectra are practically coincident in the high-frequency range from 1.4 × 10−3 to 5 × 10−3 cycles sec−1. From the growth rate of the relative separation of particles, the along-, cross-wind and vertical components of the eddy diffusivity are estimated to be 5 × 107, 107, and 106 cm2 sec−1, respectively. It is also found that a quasi-stationary process exists in the mesoscale turbulent diffusion in the atmosphere.
Some characteristics of relative particle dispersion in the atmosphere's boundary layer
Abstract The vertical, along- and cross-wind components of the relative positions and velocities of tetroon pairs are used to determine the auto- and cross-correlation functions, power- and cross-spectra as well as the relative displacement tensor. It is found that, for all three components of the relative velocity, the power-spectra are practically coincident in the high-frequency range from 1.4 × 10−3 to 5 × 10−3 cycles sec−1. From the growth rate of the relative separation of particles, the along-, cross-wind and vertical components of the eddy diffusivity are estimated to be 5 × 107, 107, and 106 cm2 sec−1, respectively. It is also found that a quasi-stationary process exists in the mesoscale turbulent diffusion in the atmosphere.
Some characteristics of relative particle dispersion in the atmosphere's boundary layer
Kao, S.-K. (author) / Wendell, Larry L. (author)
Atmospheric Environment ; 2 ; 397-407
1968-01-30
11 pages
Article (Journal)
Electronic Resource
English
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