Self-Similar Subgrid-Scale Models for Inertial Range Turbulence and Accurate Measurements of Intermittency

Luca Biferale, Fabio Bonaccorso, Michele Buzzicotti, and Kartik P. Iyer
Phys. Rev. Lett. 123, 014503 – Published 1 July 2019
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Abstract

A class of spectral subgrid models based on a self-similar and reversible closure is studied with the aim to minimize the impact of subgrid scales on the inertial range of fully developed turbulence. In this manner, we improve the scale extension where anomalous exponents are measured by roughly 1 order of magnitude when compared to direct numerical simulations or to other popular subgrid closures at the same resolution. We find a first indication that intermittency for high-order moments is not captured by many of the popular phenomenological models developed so far.

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  • Received 20 January 2019
  • Revised 31 March 2019

DOI:https://doi.org/10.1103/PhysRevLett.123.014503

© 2019 American Physical Society

Physics Subject Headings (PhySH)

Fluid DynamicsNonlinear Dynamics

Authors & Affiliations

Luca Biferale1, Fabio Bonaccorso1, Michele Buzzicotti1, and Kartik P. Iyer2

  • 1Department of Physics and INFN, University of Rome Tor Vergata, Via della Ricerca Scientifica 1, 00133, Rome, Italy
  • 2Department of Mechanical and Aerospace Engineering, New York University, New York, New York 11201, USA

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Issue

Vol. 123, Iss. 1 — 3 July 2019

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