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The Natural Evolution of Turbulent Spots in a Flat Plate Laminar Boundary Layer

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Laminar-Turbulent Transition

Part of the book series: IUTAM Symposia ((IUTAM))

Summary

Computer generated white noise sequences were used to excite a zero pressure gradient laminar boundary layer. This form of excitation generated modulated disturbance waves in a controlled and deterministic manner. By repeatedly exciting the flow with the same noise sequence, it was possible to examine the spatio-temporal evolution of the disturbance system with a single measurement probe. The development of the resulting flow structures immediately preceding the formation of a turbulent spot was investigated using hot-wire anemometry. The analysis of hot-wire measurements indicated that the resultant highly three-dimensional flow field was associated with the development of a horseshoe vortex in the flow.

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References

  1. Shaikh, F.N. and Gaster, M.: The generation of turbulent spots in a laminar boundary layer. In preparation (1994).

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  2. Shaikh, F.N: Turbulent spots in a transitional boundary layer. Ph.D Thesis. Cambridge University Engineering Department, U.K. (1994).

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  3. Gaster, M.: The origins of turbulence. Proc. conf. on New Approaches and Concepts in Turbulence, Switzerland, (1993). Pub. Birkhauser Verlag Basel.

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  4. Shaikh, F.N. and Gaster, M.: Investigation of transition to turbulence using white noise excitation. In preparation (1994).

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  5. Shaikh, F.N. and Gaster, M.: The non-linear evolution of modulated waves in a boundary layer. Journal of Eng. Math. 28, (1994) 55–71.

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Author information

Authors and Affiliations

  1. Cambridge University, UK

    F. N. Shaikh & M. Gaster

Authors
  1. F. N. Shaikh
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  2. M. Gaster
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Editor information

Editors and Affiliations

  1. Dept. of Machine Intelligence and Systems Engineering, Tohoku University, Aramaki-aza-Aoba, Aoba-ku, Sendai, 980-77, Japan

    Ryoji Kobayashi

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© 1995 Springer-Verlag Berlin Heidelberg

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Shaikh, F.N., Gaster, M. (1995). The Natural Evolution of Turbulent Spots in a Flat Plate Laminar Boundary Layer. In: Kobayashi, R. (eds) Laminar-Turbulent Transition. IUTAM Symposia. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-79765-1_32

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  • DOI: https://doi.org/10.1007/978-3-642-79765-1_32

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-79767-5

  • Online ISBN: 978-3-642-79765-1

  • eBook Packages: Springer Book Archive

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