Streaks and vortices in near-wall turbulence
Streaks and vortices in near-wall turbulence
This paper presents evidence that organization of wall-normal motions plays almost no role in the creation of streaks. This evidence consists of the theory of streak generation not requiring the existence of organized vortices, extensive quantitative comparisons between the theory and direct numerical simulations, including examples of large variation in average spacing of the streaks of different scalars simultaneously present in the flow, and an example of the scalar streaks in an artificially created purely random flow.
turbulence, streaks, organized vortices, optimal perturbation
1097-1107
Chernyshenko, S.I.
6fef97f7-e668-45f7-8fef-7a4cd4cb1fb2
Baig, M.F.
e618bead-e673-4726-a3ad-ee307203a9a0
2005
Chernyshenko, S.I.
6fef97f7-e668-45f7-8fef-7a4cd4cb1fb2
Baig, M.F.
e618bead-e673-4726-a3ad-ee307203a9a0
Chernyshenko, S.I. and Baig, M.F.
(2005)
Streaks and vortices in near-wall turbulence.
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 363 (1830), .
(doi:10.1098/rsta.2005.1552).
Abstract
This paper presents evidence that organization of wall-normal motions plays almost no role in the creation of streaks. This evidence consists of the theory of streak generation not requiring the existence of organized vortices, extensive quantitative comparisons between the theory and direct numerical simulations, including examples of large variation in average spacing of the streaks of different scalars simultaneously present in the flow, and an example of the scalar streaks in an artificially created purely random flow.
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Published date: 2005
Keywords:
turbulence, streaks, organized vortices, optimal perturbation
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Local EPrints ID: 23307
URI: http://eprints.soton.ac.uk/id/eprint/23307
ISSN: 1364-503X
PURE UUID: afda75e9-93e7-4a0d-8b34-e34dd5042d64
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Date deposited: 14 Mar 2006
Last modified: 15 Mar 2024 06:46
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Author:
S.I. Chernyshenko
Author:
M.F. Baig
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