Hairpin vortex solution in planar Couette flow: a tapestry of knotted vortices

Tomoaki Itano, Sotos C. Generalis

Research output: Contribution to journalArticle

Abstract

A numerical continuation method has been carried out seeking solutions for two distinct flow configurations, planar Couette flow (PCF) and laterally heated flow in a vertical slot (LHF). We found that the spanwise vortex solution in LHF identifies a new solution in PCF. The vortical structure of our new solution has the shape of a hairpin observed ubiquitously in high-Reynolds-number turbulent flow, and we believe this discovery may provide the paradigm for a hierarchical organization of coherent structures in turbulent shear layers.
Original languageEnglish
Article number114501
Pages (from-to)114501
Number of pages1
JournalPhysical Review Letters
Volume102
Issue number11
DOIs
Publication statusPublished - 20 Mar 2009

Keywords

  • coherent structures
  • nonlinearity
  • bifurcation
  • symmetry breaking
  • channel flow

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