On the limitations of Taylor's hypothesis in constructing long structures in a turbulent boundary layer

作者：David Dennis, T. B. Nickels · 发表于：Journal of Fluid Mechanics · 年份：2008 · DOI：10.1017/s0022112008003352 · 被引用次数：177 · 研究领域：Fluid Dynamics and Turbulent Flows、Plant Water Relations and Carbon Dynamics、Wind and Air Flow Studies

Taylor's hypothesis of frozen flow has frequently been used to convert temporal experimental measurements into a spatial domain. This technique has led to the discovery of long meandering structures in the log-region of a turbulent boundary layer. There is some contention over whether Taylor's approximation is valid over large distances. This paper presents an experiment that compares velocity fields constructed using Taylor's approximation with those obtained from particle image velocimetry (PIV), i.e. spatial data, obtained in the logarithmic region of a turbulent boundary layer.