The phase-locked mean impulse response of a turbulent channel flow

Details The phase-locked mean impulse response of a turbulent channel flow The phase-locked mean impulse response of a turbulent channel flow

2006-11-21

arxiv.org/abs/physics/0611195v1

Physics

Fluid Dynamics

Accepted for publication in Physics of Fluids

Scientific paper

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 a laminar flow with the turbulent mean velocity profile as base flow.

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