Accession Number : AD0762046

Title :   Bi-Mode Hypothesis and Horizontal Oceanic Turbulent Diffusion. I. Theoretical Predictions.

Descriptive Note : Technical rept.,

Corporate Author : OCEAN AND ATMOSPHERIC SCIENCE INC DOBBS FERRY N Y

Personal Author(s) : Kuo,E. Y. T.

Report Date : 28 JUN 1972

Pagination or Media Count : 63

Abstract : Horizontal diffusion in a distorting turbulent medium is studied in order to determine the lifetime and spatial extent of submarine wakes in various turbulent media. A familiar picture of turbulent diffusion is that of patches being acted upon by both small and large scale eddies. In the model selected here, there is isotropic turbulence in which there are only two distinct groups of eddies: those larger and those smaller than the instantaneous patch size. This is the bi-mode hypothesis. The apparent diffusivities of the combined bi-mode eddies were evaluated and the results were found to be the 4/3 power law. An additional analysis was made of the 4/3 law of ocean surface diffusion since this was felt to be perhaps the result of some peculiarities common to surface flows. Although the main text assumes that the initial distribution is a point source, a finite size source (noninfinitesimal) source is discussed in the appendix.

Descriptors :   (*WAKE, TURBULENCE), MATHEMATICAL MODELS, MASS TRANSFER, VELOCITY, NUMERICAL INTEGRATION, PARTIAL DIFFERENTIAL EQUATIONS, DIFFUSION

Subject Categories : Physical and Dynamic Oceanography
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE