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- W3170216215 abstract "In this work, we will present a physically consistent theory to derive the governing equations of the Large Eddy Simulation (LES) framework based on first principles rather than the motivation to conduct computationally affordable simulations of turbulent flows. Therefore, we assume that a coarse-grained fluid element, subsequently called super fluid element, can be locally defined comprising a large number of smaller elementary fluid elements. Then, similar to non-equilibrium molecular dynamics (NEMD), in which the transport equations of an elementary fluid element can be consistently reconstructed from the local, collective dynamics of molecules, the transport equations of a super fluid element can be derived from the local, collective dynamics of elementary fluid elements. Interestingly, we find: (a) Favre filtering is a physical consistency condition, (b) why Boussinesq's hypothesis in conjunction with eddy viscosity models is commonly employed in LES and (c) that the LES framework might be more than a numerical turbulence model for computational fluid dynamics (CFD)." @default.
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- W3170216215 date "2021-10-04" @default.
- W3170216215 modified "2023-09-26" @default.
- W3170216215 title "Fluid dynamics beyond the continuum: A physical perspective on large-eddy simulation" @default.
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- W3170216215 doi "https://doi.org/10.1103/physrevfluids.6.l102601" @default.
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