Experiments on grid-generated turbulence reveal that vortex shedding energy along the centerline is lower for a fractal square grid than for a single-square grid and than for a single-square grid with splitter plates. A less intense vortex shedding enhances non-Gaussian behavior of the velocity fluctuations in the production region, and reduces the rate of streamwise growth of the integral length scale in the decay region.
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Melina et al. (2016) studied this question.
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