Simulation and measurement of flow and heat transfer in two planar impinging jets

T. Akiyama, K. Yamamoto, K. D. Squires, Koichi Hishida

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The flow and heat transfer in two planar impinging jets are investigated using Large-Eddy simulation and experiments. The jet Reynolds number based on nozzle width and centerline velocity is 500. Predictions are obtained of unforced jets in addition to forced cases in which periodic injection and suction is applied at the nozzle exit of each jet. The goal of the current effort is to characterize the predictions of the flow from the numerical simulations prior to future efforts aimed at applying techniques to control the heat transfer on the impinging wall. Forcing results in significant changes to the flow structure with a rapid development of large-scale vortices in the shear layers emerging from the nozzle, which does not occur in the unforced jets. For both the forced and unforced flows, spanwise vorticity is apparent in the structure of the wall jet that forms as the flow develops near and along the impingement surface. The influence of the forcing raises the local Nusselt number in the vicinity of the stagnation line by about 10% compared to the unforced case.

Original languageEnglish
Pages (from-to)244-255
Number of pages12
JournalInternational Journal of Heat and Fluid Flow
Volume26
Issue number2
DOIs
Publication statusPublished - 2005 Apr

Fingerprint

heat transfer
Heat transfer
nozzles
Nozzles
simulation
wall jets
impingement
suction
shear layers
large eddy simulation
Nusselt number
predictions
vorticity
Large eddy simulation
Flow structure
emerging
Reynolds number
Vorticity
vortices
injection

Keywords

  • Heat transfer
  • Impinging jet
  • Large-Eddy simulation
  • PIV measurement

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Mechanical Engineering

Cite this

Simulation and measurement of flow and heat transfer in two planar impinging jets. / Akiyama, T.; Yamamoto, K.; Squires, K. D.; Hishida, Koichi.

In: International Journal of Heat and Fluid Flow, Vol. 26, No. 2, 04.2005, p. 244-255.

Research output: Contribution to journalArticle

Akiyama, T. ; Yamamoto, K. ; Squires, K. D. ; Hishida, Koichi. / Simulation and measurement of flow and heat transfer in two planar impinging jets. In: International Journal of Heat and Fluid Flow. 2005 ; Vol. 26, No. 2. pp. 244-255.
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