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A Combined Experimental/Numerical Study of Unsteady Phenomena in a Laminar Separation Bubble

Marxen, O, Lang, M, Rist, U and Wagner, S (2003) A Combined Experimental/Numerical Study of Unsteady Phenomena in a Laminar Separation Bubble Flow, Turbulence and Combustion, 71 (1-4). pp. 133-146.

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Abstract

A laminar boundary layer separates in a region of adverse pressure gradient on a flat plate and undergoes transition. Finally the turbulent boundary layer reattaches, forming a laminar separation bubble (LSB). Laminar-turbulent transition within such a LSB is investigated by means of Laser-Doppler-Anemometry (LDA), Particle Image Velocimetry (PIV), and direct numerical simulation (DNS). The transition mechanism occurring in the flow-field under consideration is discussed in detail. Observations for the development of small disturbances are compared to predictions from viscous linear instability theory (Tollmien-Schlichting instability). Non-linear development of these disturbances and their role in final breakdown to turbulence is analyzed.

Item Type: Article
Authors :
NameEmailORCID
Marxen, Oo.marxen@surrey.ac.ukUNSPECIFIED
Lang, MUNSPECIFIEDUNSPECIFIED
Rist, UUNSPECIFIEDUNSPECIFIED
Wagner, SUNSPECIFIEDUNSPECIFIED
Date : 1 December 2003
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 13:28
Last Modified : 17 May 2017 15:11
URI: http://epubs.surrey.ac.uk/id/eprint/839337

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