Study of Vortical Structures in a Cross-Shaped Jet

Kuniaki Toyoda, Fazle Hussain

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


Vortical structures in a cross-shaped jet have been investigated, using a flow visualization technique by laser-fluorescent dye while controlling vortex evolutions under excitation. The corner regions of vortical structures close to the orifice undergo severe deformation due to the self-induced velocity; the outward corners become flat and the inward corners generate outward ejection. The excitation at low frequencies produces the large-scale vortical structures, the strong self-induced velocity switching over the normal and diagonal axes of the cross-shaped vortices. The deformed vortical structures are stretched under the effect of the mean flow, discharging small vortices from the tips of corners through the cut-and-connect mechanism.

Original languageEnglish (US)
Pages (from-to)3205-3209
Number of pages5
JournalTransactions of the Japan Society of Mechanical Engineers Series B
Issue number518
StatePublished - 1989


  • Coherent Structure
  • Cross-shaped Orifice
  • Flow Visualization
  • Jet
  • Turbulent Flow
  • Vortex

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering


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