On the large-scale sweeping of small-scale eddies in turbulence -- A filtering approach
| Autor: | Theodore D. Drivas, Cristian Lalescu, Michael Wilczek, Perry L. Johnson |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Předmět: |
Fluid Flow and Transfer Processes
Scale (ratio) Spatial filter Advection Turbulence Computational Mechanics Fluid Dynamics (physics.flu-dyn) FOS: Physical sciences Mechanics Physics - Fluid Dynamics 01 natural sciences 010305 fluids & plasmas Nonlinear Sciences::Chaotic Dynamics Physics::Fluid Dynamics Fully developed Eddy Modeling and Simulation 0103 physical sciences 010303 astronomy & astrophysics Geology |
| Popis: | We present an analysis of the Navier-Stokes equations based on a spatial filtering technique to elucidate the multi-scale nature of fully developed turbulence. In particular, the advection of a band-pass-filtered small-scale contribution by larger scales is considered, and rigorous upper bounds are established for the various dynamically active scales. The analytical predictions are confirmed with direct numerical simulation data. The results are discussed with respect to the establishment of effective large-scale equations valid for turbulent flows. 14 pages, 6 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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