The effects of large scales on the inertial range in high-Reynolds-number turbulence

Katepalli R. Sreenivasan; Brindesh Dhruva; Inigo San Gil

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The effects of large scales on the inertial range in high-Reynolds-number turbulence

Katepalli R. Sreenivasan·Brindesh Dhruva·Inigo San Gil

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Abstract

The effects of removing large scales external to the inertial range on the properties of scales within the inertial range are studied in a high-Reynolds-number turbulent flow. Structure functions of both even and odd orders are strongly affected across the entire inertial range, but odd-order moments are affected to a greater degree. In particular, the skewness of velocity increments shows a significant reduction whereas the flatness changes comparatively little. The reduction in skewness is counterbalanced essentially by the interaction between the small-scale energy and the large-scale rate of strain. The implications of these results for the conventional cascade picture are examined briefly.

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Katepalli R. Sreenivasan, Brindesh Dhruva, Inigo San Gil. 1999-06-24. The effects of large scales on the inertial range in high-Reynolds-number turbulence. https://arxiv.org/abs/chao-dyn/9906041

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