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First Symposium on Turbulence and Shear Flow Phenomena
September, 12-15, 1999, Doubletree Resort, Santa Barbara, California, USA

DOI: 10.1615/TSFP1

SPACE-TIME CORRELATIONS IN SEPARATED FLOW BEHIND A SURFACE MOUNTED OBSTACLE

pages 1149-1154
DOI: 10.1615/TSFP1.1830
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Autocorrelations and two-point correlations are reported from separated flow behind a surface mounted triangular cylinder, using both pulsed and conventional hot-wire anemometry. Autocorrelations and spectra reveal separate large scales throughout the flow, notably, scales owing to vortex shedding from the separation and very low frequency fluctuations. Two-point correlations indicate considerable correlation between the backflow and the outer flow. Both vortex shedding and large-scale fluctuations are detected in these measurements, indicating that these features affect the whole of the flow.

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