Dissipation in helical turbulence
| Autor: | P. Giuliani, P. D. Ditlevsen |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Fluid Flow and Transfer Processes
Physics Quantitative Biology::Biomolecules Scale (ratio) Turbulence Mechanical Engineering Computational Mechanics Kolmogorov microscales Reynolds number Dissipation Condensed Matter Physics Helicity symbols.namesake Mechanics of Materials Cascade Energy cascade symbols Mathematical physics |
| Zdroj: | Physics of Fluids. 13:3508-3509 |
| ISSN: | 1089-7666 1070-6631 |
| DOI: | 10.1063/1.1404138 |
| Popis: | In helical turbulence a linear cascade of helicity accompanying the energy cascade has been suggested. Since energy and helicity have different dimensionality we suggest the existence of a characteristic inner scale, $\xi=k_H^{-1}$, for helicity dissipation in a regime of hydrodynamic fully developed turbulence and estimate it on dimensional grounds. This scale is always larger than the Kolmogorov scale, $\eta=k_E^{-1}$, and their ratio $\eta / \xi $ vanishes in the high Reynolds number limit, so the flow will always be helicity free in the small scales. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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