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Turbulence and Shear Flow Phenomena -1 First International Symposium

ISBN 打印: 1-56700-135-1

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

Abstract

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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