Diffusion of passive scalar in a finite-scale random flow

Diffusion of passive scalar in a finite-scale random flow

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We consider a solvable model of the decay of scalar variance in a single-scale random velocity field. We show that if there is a separation between the flow scale k_flow^{-1} and the box size k_box^{-1}, the decay rate lambda ~ (k_box/k_flow)^2 is determined by the turbulent diffusion of the box-sca...

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Bibliografiske detaljer
Main Authors:	Schekochihin, A, Haynes, P, Cowley, S
Format:	Journal article
Udgivet:	2004

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