Bottlenecks in turbulent kinetic energy spectra predicted from structure function inflections using the Von Kármán-Howarth equation.
Journal Article (Journal Article)
The compensated three-dimensional turbulent kinetic energy spectrum exhibits a peculiar bump at wave numbers in the vicinity of the crossover from inertial to viscous regimes due to pile up in turbulent kinetic energy, a phenomenon referred to as the bottleneck effect. The origin of this bump is linked to an inflection point in the second-order structure function in physical space caused by competition between vortex stretching and viscous diffusion mechanisms. The bump location and magnitude are reasonably predicted from a novel analytical solution to the Von Kármán-Howarth equation reflecting the competition between these two mechanisms and accounting for variable structure skewness with decreasing scale.
Full Text
Duke Authors
Cited Authors
- Katul, GG; Manes, C; Porporato, A; Bou-Zeid, E; Chamecki, M
Published Date
- September 11, 2015
Published In
Volume / Issue
- 92 / 3
Start / End Page
- 033009 -
PubMed ID
- 26465558
Electronic International Standard Serial Number (EISSN)
- 1550-2376
International Standard Serial Number (ISSN)
- 1539-3755
Digital Object Identifier (DOI)
- 10.1103/physreve.92.033009
Language
- eng