Autogeneration of near-wall vortical structures in channel flow

Jigen Zhou, Ronald Adrian, S. Balachandar

Research output: Contribution to journalArticle

134 Citations (Scopus)

Abstract

The evolution of a symmetric pair of quasistreamwise vortical structures extracted from the two-point correlation tensor of turbulent channel flow data by a linear stochastic estimation procedure is studied through direct numerical simulation. It is observed that an Ω-shaped hairpin vortex is formed quickly from this initial structure. Sufficiently strong hairpin vortices are observed to generate a hierarchy of secondary hairpin vortices, and the mechanism of their creation closely resembles the formation of the primary hairpin vortex. New streamwise vortices are also generated, and this process provides a means for a few vortical disturbances of adequate strength to reproduce themselves and eventually populate the near-wall layer.

Original languageEnglish (US)
Pages (from-to)288-290
Number of pages3
JournalPhysics of Fluids
Volume8
Issue number1
StatePublished - Jan 1996
Externally publishedYes

Fingerprint

horseshoe vortices
channel flow
Channel flow
Vortex flow
direct numerical simulation
hierarchies
Direct numerical simulation
disturbances
Tensors
tensors
vortices

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Computational Mechanics
  • Mechanics of Materials
  • Physics and Astronomy(all)
  • Condensed Matter Physics

Cite this

Autogeneration of near-wall vortical structures in channel flow. / Zhou, Jigen; Adrian, Ronald; Balachandar, S.

In: Physics of Fluids, Vol. 8, No. 1, 01.1996, p. 288-290.

Research output: Contribution to journalArticle

Zhou, J, Adrian, R & Balachandar, S 1996, 'Autogeneration of near-wall vortical structures in channel flow', Physics of Fluids, vol. 8, no. 1, pp. 288-290.
Zhou, Jigen ; Adrian, Ronald ; Balachandar, S. / Autogeneration of near-wall vortical structures in channel flow. In: Physics of Fluids. 1996 ; Vol. 8, No. 1. pp. 288-290.
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