Vortex structure and heat transfer in the stagnation region of an impinging plane jet (simultaneous measurements of velocity and temperature fields by digital particle image velocimetry and laser-induced fluorescence)

Jun Sakakibara, Koichi Hishida, Masanobu Maeda

Research output: Contribution to journalArticle

121 Citations (Scopus)

Abstract

Velocity and temperature in the stagnation region of an impinging plane jet were simultaneously measured by digital particle image velocimetry and laser-induced fluorescence. Counter-rotating vortex pairs observed in the stagnation region sweep cold fluid toward the wall and eject high-temperature fluid toward the outer region. The weighted PDF of the turbulent heat flux indicates that the contribution of this ejection mechanism to the net heat flux is dominant. The streamwise vortex pair is transported from the free-jet region to the stagnation region and the vorticity is amplified by the main stream of what in the vicinity of the wall.

Original languageEnglish
Pages (from-to)3163-3176
Number of pages14
JournalInternational Journal of Heat and Mass Transfer
Volume40
Issue number13
DOIs
Publication statusPublished - 1997 Sep

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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