Direct Assessment of Vorticity Alignment with Local and Nonlocal Strain Rates in Turbulent Flows

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dc.creatorHamlington, Peter E.
dc.creatorSchumacher, Jörg
dc.creatorDahm, Werner J. A.
dc.date2008-10-19
dc.date.accessioned2026-07-07T12:08:02Z
dc.date.available2026-07-07T12:08:02Z
dc.descriptionA direct Biot-Savart integration is used to decompose the strain rate into its local and nonlocal constituents, allowing the vorticity alignment with the local and nonlocal strain rate eigenvectors to be investigated. These strain rate tensor constituents are evaluated in a turbulent flow using data from highly-resolved direct numerical simulations. While the vorticity aligns preferentially with the intermediate eigenvector of the \textit{combined} strain rate, as has been observed previously, the present results for the first time clearly show that the vorticity aligns with the most extensional eigenvector of the \textit{nonlocal} strain rate. This in turn reveals a significant linear contribution to the vortex stretching dynamics in turbulent flows.
dc.description5 pages, 5 figures, to appear as a Letter in Physics of Fluids
dc.identifierhttps://arxiv.org/abs/0810.3439
dc.identifierhttp://arxiv.org/abs/0810.3439
dc.identifierPhys. Fluids 20, 111703 (2008)
dc.identifierdoi:10.1063/1.3021055
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/209180
dc.subjectFluid Dynamics
dc.titleDirect Assessment of Vorticity Alignment with Local and Nonlocal Strain Rates in Turbulent Flows
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