Quasilaminar regime in the linear response of a turbulent flow to wall waviness | Zendy

Paolo Luchini | Zendy; François Charru | Zendy

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Quasilaminar regime in the linear response of a turbulent flow to wall waviness

Author(s) -

Paolo Luchini,

François Charru

Publication year - 2017

Publication title -

physical review fluids

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.244

H-Index - 37

eISSN - 2469-9918

pISSN - 2469-990X

DOI - 10.1103/physrevfluids.2.012601

Subject(s) - waviness , turbulence , mechanics , amplitude , flow (mathematics) , physics , materials science , optics , composite material

The linear response of the wall-shear stress of a turbulent flow to wall waviness is\udanalyzed in the context of a comparison between existing experiments, direct numerical\udsimulations, and analytical approximations. The spectral region where the response is\udlargest is found to be amenable to a simplified quasilaminar analysis. The end result is\uda parameterless description of this phenomenon that completely captures its physics in a\udsingle analytical formula, a Pad´e approximation of the response function

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