OPTIMAL PERTURBATIONS AND STREAK SPACING IN WALL-BOUNDED TURBULENT SHEAR-FLOW

被引：176

作者：

BUTLER, KM

FARRELL, BF

机构：

[1] Division of Applied Sciences, Harvard University, Cambridge

来源：

PHYSICS OF FLUIDS A-FLUID DYNAMICS | 1993年 / 5卷 / 03期

关键词：

D O I：

10.1063/1.858663

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The mean streak spacing of approximately 100 wall units that is observed in wall-bounded turbulent shear flow is shown to be consistent with near-wall streamwise vortices optimally configured to gain the most energy over an appropriate turbulent eddy turnover time. The streak spacing arising from the optimal perturbation increases with distance from the wall and is nearly independent of Reynolds number, in agreement with experiment.

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页码：774 / 777

页数：4

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