First Symposium on Turbulence and Shear Flow Phenomena
DOI: 10.1615/TSFP1
SPACE-TIME CORRELATIONS IN SEPARATED FLOW BEHIND A SURFACE MOUNTED OBSTACLE
pages 1149-1154
DOI: 10.1615/TSFP1.1830
ABSTRAKT
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.