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.

Biferale, L., Bonaccorso, F., Buzzicotti, M., Iyer, K.p. (2019). Self-similar subgrid-scale models for inertial range turbulence and accurate measurements of intermittency. PHYSICAL REVIEW LETTERS, 123(1) [10.1103/PhysRevLett.123.014503].

Self-similar subgrid-scale models for inertial range turbulence and accurate measurements of intermittency

Biferale, Luca;Buzzicotti, Michele;
2019-01-01

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.
2019
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/02 - FISICA TEORICA, MODELLI E METODI MATEMATICI
English
Con Impact Factor ISI
nonlinear dynamics; fluid dynamics; turbulence modeling
https://arxiv.org/abs/1901.08310
Biferale, L., Bonaccorso, F., Buzzicotti, M., Iyer, K.p. (2019). Self-similar subgrid-scale models for inertial range turbulence and accurate measurements of intermittency. PHYSICAL REVIEW LETTERS, 123(1) [10.1103/PhysRevLett.123.014503].
Biferale, L; Bonaccorso, F; Buzzicotti, M; Iyer, Kp
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/264441
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