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Journal Articles Journal of Physical Oceanography Year : 2020

Deciphering the role of small-scale inhomogeneity on geophysical flow structuration: a stochastic approach

Abstract

An important open question in fluid dynamics concerns the effect of small-scales in structuring a fluid flow. In oceanic or atmospheric flows, this is aptly captured in wave-current interactions through the study of the well-known Langmuir secondary circulation. Such wave-current interactions are described by the Craik-Leibovich system, in which the action of a wave induced velocity, the Stokes drift, produces a so called "vortex force" that causes streaking in the flow. In this work, we show that these results can be generalized as a generic effect of the spatial inhomogeneity of the statistical properties of the small-scale flow components. As demonstrated, this is well captured through a stochastic representation of the flow.
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Dates and versions

hal-02398521 , version 1 (07-12-2019)

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Werner Bauer, Pranav Chandramouli, Bertrand Chapron, Long Li, Etienne Mémin. Deciphering the role of small-scale inhomogeneity on geophysical flow structuration: a stochastic approach. Journal of Physical Oceanography, 2020, 50 (4), pp.983-1003. ⟨10.1175/JPO-D-19-0164.1⟩. ⟨hal-02398521⟩
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