Abstract
In this paper we present PIV measurements of turbulent pipe flow at Reynolds numbers between 3.4 × 10^5 and 6.9 × 10^5. We apply a so-called 'single-pixel correlation' that yields a superior spatial resolution. We use the location and shape of the averaged correlation peak to obtain the mean velocity and normal and Reynolds stresses. A novel aspect of the single-pixel correlation approach is the extension to determine the spatial correlation of the velocity fluctuations. In this contribution, we present the results for Re_D = 4.98 × 10^5, corresponding to a shear Reynolds number Re_τ = 10254, with a spatial resolution of Δy+ = 19.
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