Abstract
Memory effects in turbulent plane wakes have been investigated for various wake generators (circular, triangular and square cylinders and a screen of 50% solidity) using orthogonal arrays of X-wires, eight in the (x,y) plane and eight in the (x, z) plane. In the far-wake region, discernible differences are observed for different generators, in the measured Reynolds stresses, spectra of v and approximations to the rms spanwise and lateral vorticities. These differences, which reflect variations in various aspects of the organised large-scale structures, are quantified through the contributions these structures make to the Reynolds stresses. The difference between the screen and the solid body wakes is especially pronounced.
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The support of the Australian Research Council is gratefully acknowledged
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Zhou, Y., Antonia, R.A. Memory effects in a turbulent plane wake. Experiments in Fluids 19, 112–120 (1995). https://doi.org/10.1007/BF00193857
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DOI: https://doi.org/10.1007/BF00193857