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

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

Accepted for publication in Physics of Fluids

References in corpus (1)

• A low-cost parallel implementation of direct numerical simulation of wall turbulence

Cited by in corpus (4)

• Model-based design of transverse wall oscillations for turbulent drag reduction
• Coherent structures in the linearized impulse response of turbulent channel flow
• Correlation function and linear response function of homogeneous isotropic turbulence in the Eulerian and Lagrangian coordinates
• DNS-based measurement of the mean impulse response of homogeneous isotropic turbulence