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Turbulent mixing in a confined rectangular wake
- Source :
-
Chemical Engineering Science . Nov2006, Vol. 61 Issue 21, p6946-6962. 17p. - Publication Year :
- 2006
-
Abstract
- Abstract: Liquid-phase turbulent transport in a confined rectangular wake was investigated for a Reynolds number of 37,500 based on bulk velocity and the hydraulic diameter of the test section and a Schmidt number of 1250 using particle image velocimetry (PIV) and planar laser-induced fluorescence (PLIF). The velocity and concentration field data were analyzed for flow statistics such as the mean velocity, Reynolds stresses, turbulent kinetic energy, turbulent dissipation rate, mixture-fraction mean, mixture-fraction variance and one-point composition probability density functions (PDF). Computational fluid dynamics (CFD) models, including a two-layer – turbulence model, a scalar gradient-diffusion model and a scalar dissipation rate model were validated against PIV and PLIF data collected at six downstream locations. Low-Reynolds-number effects on turbulent transport were taken into consideration through the mechanical-to-scalar time-scale ratio. The experimental and computational results were found to be in satisfactory agreement. [Copyright &y& Elsevier]
- Subjects :
- *FLUID dynamics
*FLUIDS
*TURBULENCE
*FLUORESCENCE
Subjects
Details
- Language :
- English
- ISSN :
- 00092509
- Volume :
- 61
- Issue :
- 21
- Database :
- Academic Search Index
- Journal :
- Chemical Engineering Science
- Publication Type :
- Academic Journal
- Accession number :
- 22578844
- Full Text :
- https://doi.org/10.1016/j.ces.2006.07.011