We describe the first DNS-based measurement of the complete mean response of a turbulent channel flow to small external disturbances. Space-time impulsive perturbations are applied at one channel wall, and the linear response describes their mean effect on the flow field as a function of spatial and temporal separations. The turbulent response is shown to differ from the response of a laminar flow with the turbulent mean velocity profile as the base flow. © 2006 American Institute of Physics. ͓DOI: 10.1063/1.2409729͔
The phase-locked mean impulse response of a turbulent channel flow
LUCHINI, Paolo;
2006-01-01
Abstract
We describe the first DNS-based measurement of the complete mean response of a turbulent channel flow to small external disturbances. Space-time impulsive perturbations are applied at one channel wall, and the linear response describes their mean effect on the flow field as a function of spatial and temporal separations. The turbulent response is shown to differ from the response of a laminar flow with the turbulent mean velocity profile as the base flow. © 2006 American Institute of Physics. ͓DOI: 10.1063/1.2409729͔File in questo prodotto:
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