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

119 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
Publication statusPublished - 1997 Sep

Fingerprint

stagnation point
particle image velocimetry
Velocity measurement
laser induced fluorescence
Heat flux
Temperature distribution
Vortex flow
temperature distribution
velocity distribution
Fluorescence
heat transfer
vortices
Heat transfer
Fluids
Lasers
heat flux
high temperature fluids
Vorticity
free jets
ejection

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Energy(all)
  • Mechanical Engineering

Cite this

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AU - Maeda, Masanobu

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AB - 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.

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