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On the streamwise velocity variance in the near-wall region of turbulent flows

On the streamwise velocity variance in the near-wall region of turbulent flows

We study the behaviour of the streamwise velocity variance in turbulent wall-bounded flows using a direct numerical simulation (DNS) database of pipe flow up to friction Reynolds number ${{Re}}_{\tau } \approx 12000$ . The analysis of the spanwise spectra in the viscous near-wall region strongly hints to the presence of …