title: Evidence of the kappa1-1 law in a high-Reynolds-number turbulent boundary layer.
abstract: Dimensional analysis and overlap arguments lead to a prediction of a region in the streamwise velocity spectrum of wall-bounded turbulent flows in which the dependence on the streamwise wave number, kappa(1), is given by kappa(1)(-1). Some recent experiments have questioned the existence of this region. In this Letter, experimental spectra are presented which support the existence of the kappa(1)(-1) law in a high-Reynolds-number boundary layer. This Letter presents the experimental results and discusses the theoretical and experimental issues involved in examining the existence of the kappa(1)(-1) law and the reasons why it has proved so elusive.
authors.affiliation: Department of Engineering, University of Cambridge, UK. tbn22@eng.cam.ac.uk
authors.forename: T B
authors.initials: TB
authors.lastname: Nickels
authors.forename: I
authors.initials: I
authors.lastname: Marusic
authors.forename: S
authors.initials: S
authors.lastname: Hafez
authors.forename: M S
authors.initials: MS
authors.lastname: Chong