Modeling subgrid-scale forces by spatial artificial neural networks in large eddy simulation of turbulence

C Xie, J Wang, WE - Physical Review Fluids, 2020 - APS
Spatial artificial neural network (ANN) models are developed for subgrid-scale (SGS) forces
in the large eddy simulation (LES) of turbulence. The input features are based on the first …

Subgrid-scale models of isotropic turbulence need not produce energy backscatter

A Vela-Martín - Journal of Fluid Mechanics, 2022 - cambridge.org
This investigation questions the importance of inverse interscale energy fluxes, the so-called
energy backscatter, for the modelling of the energy cascade in large-eddy simulations (LES) …

Two-point stress–strain-rate correlation structure and non-local eddy viscosity in turbulent flows

PC Di Leoni, TA Zaki, G Karniadakis… - Journal of Fluid …, 2021 - cambridge.org
By analysing the Karman–Howarth equation for filtered-velocity fields in turbulent flows, we
show that the two-point correlation between the filtered strain-rate and subfilter stress …

Synchronizing subgrid scale models of turbulence to data

M Buzzicotti, P Clark Di Leoni - Physics of Fluids, 2020 - pubs.aip.org
Large eddy simulations of turbulent flows are powerful tools used in many engineering and
geophysical settings. Choosing the right value of the free parameters for their subgrid scale …

Spatio-temporal fluctuations of interscale and interspace energy transfer dynamics in homogeneous turbulence

HS Larssen, JC Vassilicos - Journal of Fluid Mechanics, 2023 - cambridge.org
We study fluctuations of all co-existing energy exchange/transfer/transport processes in
stationary periodic turbulence including those that average to zero and are not present in …

Research on quality control of precision machining straight internal gear by abrasive flow based on large eddy simulation

T Zou, Q Yan, L Wang, Y An, J Qu, J Li - The International Journal of …, 2022 - Springer
Traditional finishing technology is difficult to realize the precision machining of complex
geometric parts. Abrasive flow machining technology solves this problem well. Taking the …

Spatio‐temporal coarse‐graining decomposition of the global ocean geostrophic kinetic energy

M Buzzicotti, BA Storer, H Khatri… - Journal of Advances …, 2023 - Wiley Online Library
We expand on a recent determination of the first global energy spectrum of the ocean's
surface geostrophic circulation (Storer et al., 2022, https://doi. org/10.1038/s41467-022 …

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

L Biferale, F Bonaccorso, M Buzzicotti, KP Iyer - Physical review letters, 2019 - APS
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 …

Why (Still) Studying Turbulence in Fluids and Plasmas?

T Alberti, R Benzi, V Carbone - Perspectives of Earth and …, 2023 - Wiley Online Library
Turbulence, a captivating and intricate phenomenon, continues to attract researchers across
diverse scientific disciplines. Despite considerable efforts, turbulence remains a fascinating …

Research on quality analysis of solid-liquid two-phase abrasive flow precision machining based on different sub-grid scale models

W Zhao, J Qu, J Li, N Su, G Shi, J Liu - The International Journal of …, 2022 - Springer
In the traditional precision and ultra-precision machining technology field, workpieces with
irregular internal curved surfaces tend to have no subsequent processing after basic …