中文摘要：

狂暴的结构的一个新奇观点—本地串联结构—被介绍在狂暴的隧道流动学习传送对流现象。跨关联的方法被用来计算传送对流速度的一空间时间。墙附近有二典型传送对流速度，这被发现，与溪流与更低的速度和另外一个的小规模的条纹联系的更高的速度的明智的旋涡和发卡旋涡。狂暴的结构的新概念是强大的在近墙的传送对流说明协调结构的主导的角色，并且也揭示传送对流的性质—速度变化的模式的繁殖—它是规模依赖者。

英文摘要：

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.