Bottleneck effects in turbulence: Scaling phenomena in r- versus p-space

Details Bottleneck effects in turbulence: Scaling phenomena in r- versus p-space Bottleneck effects in turbulence: Scaling phenomena in r- versus p-space

1994-05-04

arxiv.org/abs/chao-dyn/9405002v2

Phys. Rev. Lett. 74, 1747-1750 (1995)

Nonlinear Sciences

Chaotic Dynamics

9 pages, 3figures on request

Scientific paper

10.1103/PhysRevLett.74.1747

We (analytically) calculate the energy spectrum corresponding to various experimental and numerical turbulence data analyzed by Benzi et al.. We find two bottleneck phenomena: While the local scaling exponent $\zeta_r(r)$ of the structure function decreases monotonically, the local scaling exponent $\zeta_p(p)$ of the corresponding spectrum has a minimum of $\zeta_p(p_{min})\approx 0.45$ at $p_{min}\approx (10 \eta)^{-1}$ and a maximum of $\zeta_p(p_{max})\approx 0.77$ at $p_{max}\approx 8 L^{-1}$. A physical argument starting from the constant energy flux in p--space reveals the general mechanism underlying the energy pileups at both ends of the p--space scaling range. In the case studied here, they are induced by viscous dissipation and the reduced spectral strength on the scale of the system size, respectively.

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