LDV measurement and Navier-Stokes computation of parallel jet mixing in a rectangular confinement
- Knolls Atomic Power Lab., Schenectady, NY (United States)
- Arizona State Univ., Tempe, AZ (United States). Dept. of Mechanical and Aerospace Engineering
Laser Doppler Velocimetry (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 turbulence modelling. A low-Reynolds number full-Reynolds stress model is shown to provide improvement.
- Research Organization:
- Knolls Atomic Power Lab., Schenectady, NY (United States)
- Sponsoring Organization:
- USDOE Assistant Secretary for Nuclear Energy, Washington, DC (United States)
- DOE Contract Number:
- AC12-76SN00052
- OSTI ID:
- 350940
- Report Number(s):
- KAPL-P--000007; K--95065; CONF-950634--; ON: DE99002687
- Country of Publication:
- United States
- Language:
- English
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