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The spanwise structure of the bursting phenomenon

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Structure and Mechanisms of Turbulence I

Part of the book series: Lecture Notes in Physics ((LNP,volume 75))

Abstract

The streamwise and spanwise velocity components in the wall region of a turbulent channel flow have been studied in order to help clarify the three-dimensional nature of the bursting process. The bursts were detected at y+ ≈ 15 by using short time (VITA.) aver ages of the streamwise velocity component. Conditional averages with a time delay were obtained from wall elements having a spanwise spatial separation. The defect of streamwise momentum, directly before the detection of the burst, is formed by low-speed fluid coming in from the positive and negative spanwise direction. The strength of the defect region slowly increases and possibly forms a low-speed streak as observed in visualization studies. The extent of this motion in the spanwise direction has been studied using space-time correlation techniques.

This research was performed while on sabbatical leave at the Max-Planck-Institut Mr Strömungsforschung, Göttingen

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Author information

Authors and Affiliations

  1. University of Southern California, 90007, Los Angeles, California, USA

    R. F. Blackwelder

  2. Lehrstuhl für Angewandte Mechanik und Strömungsphysik, D 34, Göttingen, BRD

    H. Eckelmann

Authors
  1. R. F. Blackwelder
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  2. H. Eckelmann
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H. Fiedler

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© 1978 Springer-Verlag

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Blackwelder, R.F., Eckelmann, H. (1978). The spanwise structure of the bursting phenomenon. In: Fiedler, H. (eds) Structure and Mechanisms of Turbulence I. Lecture Notes in Physics, vol 75. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-08765-6_18

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  • DOI: https://doi.org/10.1007/3-540-08765-6_18

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-08765-6

  • Online ISBN: 978-3-540-35839-8

  • eBook Packages: Springer Book Archive

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