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Toward autonomous large eddy simulations of turbulence based on interscale energy transfer among resolved scales
Phys. Rev. Fluids 6, 104606 – Published 20 October, 2021
DOI: https://doi.org/10.1103/PhysRevFluids.6.104606
Abstract
In the present work we show how the subgrid-scale (SGS) energy transfer among resolved scales in large eddy simulations (LESs) and its wave number distribution can be obtained from the evolving LES velocity fields. This information, supplemented by the known asymptotic properties of energy flux in the inertial range, when cast in the form of a spectral eddy viscosity, allows self-contained simulations without use of extraneous SGS models. The method is tested in LESs of isotropic turbulence at high Reynolds number where the inertial range dynamics is expected and for lower-Reynolds-number decaying turbulence under conditions of the classical Comte-Bellot–Corrsin experiments.
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