Spectral analysis of the evolution of energy-containing eddies

Energy-containing eddies (energy-eddies) are the elementary structures of wall turbulence that carry most kinetic energy and momentum. Despite consensus energy-eddies can self-sustain at each relevant length scale, their precise origin spatial evolution currently not well understood. In this study, we examine by quenching them inflow a turbulent channel flow. Our study shows involved in cascade cannot be sustained without energy-eddies. The streamwise velocity spectra evolving flow start to recover spanwise wavelength $\lambda _z^+ \simeq 100$ , equal near-wall spacing streaks buffer layer located $y^+ 15$ whereas there no active vortical motions vorticity until streak location is re-established. Hence, present demonstrates spatially flow, formation primary process necessary recovery