@article {35300,
	title = {The nature of near-wall convection velocity in turbulent channel flow},
	journal = {Acta Mechanica SinicaActa Mechanica Sinica},
	volume = {24},
	number = {5},
	year = {2008},
	note = {362erTimes Cited:2Cited References Count:13},
	month = {Oct},
	pages = {587-590},
	chapter = {587},
	abstract = {A novel notion of turbulent structure-the local cascade structure-is introduced to study the convection phenomenon in a turbulent channel flow. A space-time cross-correlation method is used to calculate the convection velocity. It is found that there are two characteristic convection speeds near the wall, one associated with small-scale streaks of a lower speed and another with streamwise vortices and hairpin vortices of a higher speed. The new concept of turbulent structure is powerful to illustrate the dominant role of coherent structures in the near-wall convection, and to reveal also the nature of the convection-the propagation of patterns of velocity fluctuations-which is scale-dependent.},
	keywords = {boundary-layer, cascade, channel flow, coherent structures, convection, scale, structure classification, turbulent structure, viscous sublayer},
	isbn = {0567-7718},
	author = {Cao, Yu-Hui and Jun Chen and Zhen-Su She}
}
