Abstract
An approximation for single-particle diffusion in strongly stratified and/or rapidly rotating turbulence is derived on the basis of a linearized approximation of the equations of motion as well as Corrsin's conjecture for the Lagrangian two-time correlation. The approximation suggests that single-particle diffusion may be strongly suppressed by stratification and rotation of turbulence. It also suggests that the effect of slow rotation in strongly stratified turbulence nor that of weak stratification in rapidly rotating turbulence is not simply additive, and that the degree of suppression of turbulent diffusion depends not only on single-point statistics such as the total kinetic energy, but also on two-point statistics or the spectra of the initial velocity and density fields.
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