LDV Measurement and navier-stokes computation of parallel jet mixing in a rectangular confinement

Robert F. Kunz, Stephen W. D'Amico, Peter F. Vassallo, Michael A. Zaccaria, Hakan Aksoy, Ronald M.C. So

Research output: Contribution to conferencePaperpeer-review


Laser Doppler Vclocimetry (LDV) measurements were taken in a rectangular confinement into which issues a row of parallel jets. Two-component measurements were taken with two optics orientations yielding three mean velocity components and four Reynolds stress components. As observed in isolated three dimensional wall bounded jets, the transverse diffusion of the jets is quite large. The data indicates that this rapid mixing process is due to strong secondary flows, transport of large inlet intensities and Reynolds stress anisotropy effects. Navier-Stokes analyses of this configuration underpredict the rate of transverse jet diffusion. Detailed numerical accuracy studies show that this is attributed to shortcomings in low-Reynolds number two-equation tuibulence modelling. A low-Reynolds number full-Reynolds stress model is shown to provide improvement.

Original languageEnglish (US)
Number of pages9
StatePublished - 1995
EventFluid Dynamics Conference, 1995 - San Diego, United States
Duration: Jun 19 1995Jun 22 1995


OtherFluid Dynamics Conference, 1995
Country/TerritoryUnited States
CitySan Diego

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes
  • Energy Engineering and Power Technology


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