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On how a joint interaction of two innocent partners (smooth advection and linear damping) produces a strong intermittency (1998)

Chertkov, M.

[S.l.] : American Institute of Physics (AIP)

Physics of Fluids 10 (1998), S. 3017-3019

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ISSN: 1089-7666

Source: AIP Digital Archive

Topics: Physics

Notes: Forced advection of passive scalar by a smooth d-dimensional incompressible velocity in the presence of linear damping is studied. Acting separately advection and damping do not lead to an essential intermittency of the steady scalar statistics, while being mixed together produce a very strong non-Gaussianity in the convective range: 2n-th moment of scalar difference, 〈[θ(t;r)−θ(t;0)]2n〉 is proportional to rξ2n, ξ2n=min{2n,d2/4+2αdn/[(d−1)D]−d/2}, where α/D measures the rate of the damping in the units of the stretching rate. The probability density function (PDF) of the scalar difference is also found. © 1998 American Institute of Physics.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.869826

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