Convection Velocities in Turbulent Boundary Layers over Rough Surfaces

被引：0
|
作者：
Jurcakova, Klara [1 ]
Kellnerova, Radka [1 ]
机构：
[1] Czech Acad Sci, Inst Thermomech, Dolejskova 5, Prague 18200, Czech Republic
来源：
PROGRESS IN TURBULENCE VIII | 2019年 / 226卷
关键词：
TAYLORS HYPOTHESIS;
D O I：
10.1007/978-3-030-22196-6_15
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
The time-resolved particle image velocimetry was used to asses the mean convection velocities of flow structures within the turbulent boundary layers above rough surfaces. The mean convection velocity was derived from the temporal-spatial correlation function. The mean convection velocities are larger than local mean velocities in the log layer and lower wake layer and vice versa in the upper wake layer. The cross-over height is higher for more rough surfaces. Larger structures are convected faster than smaller structures.
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收藏
页码：93 / 98
页数：6
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