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

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

LUCHINI, Paolo;
2017

Abstract

The linear response of the wall-shear stress of a turbulent flow to wall waviness is analyzed in the context of a comparison between existing experiments, direct numerical simulations, and analytical approximations. The spectral region where the response is largest is found to be amenable to a simplified quasilaminar analysis. The end result is a parameterless description of this phenomenon that completely captures its physics in a single analytical formula, a Pad´e approximation of the response function.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11386/4683363
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