The scaling of the longitudinal velocity structure functions, , is analyzed up to order in a decaying rotating turbulence experiment from a large particle image velocimetry dataset. The exponent of the second order structure function increases throughout the self-similar decay regime, up to the Ekman time scale. The normalized higher-order exponents are close to those of the intermittent nonrotating case at small times, but show a marked departure at larger times, on a time scale ( is the rotation rate), although a strictly nonintermittent linear law is not reached.
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Instead of the convergence test based on Eq. (1), a similar test based on the integrand itself, as , has also been used in the literature. However, the visual quality of convergence from this quantity strongly depends on the choice of the bin width used to compute the pdf, especially for the far tails where empty bins are present, so criterion based on the truncated integral (1) were found more reliable.
