NDLI: Large-eddy-simulation-based analysis of Reynolds-stress budgets for a round impinging jet

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Large-eddy-simulation-based analysis of Reynolds-stress budgets for a round impinging jet

Content Provider	Hyper Articles en Ligne (HAL)
Author	Colombié, Arthur Laroche, Emmanuel Chedevergne, François Manceau, Remi Duchaine, Florent Gicquel, Laurent
Abstract	A large-eddy simulation is used to assess the Reynolds-stress budgets of a round impinging jet in the context of a second-moment closure of turbulence. The present work focuses on the stagnation region where no data are available in the literature except in the wall vicinity. Inside the stagnation region, it is shown that the pressure terms are dominant in the budgets. They balance the Reynolds-stress production and the convective ﬂuxes. A visualization of this equilibrium through a speciﬁc indicator reveals that impingement effects extend to less than one nozzle diameter in the wall-normal direction and to about one diameter radially. This study underlines the role of the pressure diffusion term that conveys energy to the wall, balancing the high production rates (both positive or negative). Finally, the failure of turbulence models is explained by the absence of appropriate modeling of this pressure diffusion term leading to excessive Reynolds-stress values inside the impingement region.
Related Links	https://univ-pau.hal.science/hal-03423068/file/Colombie2021.pdf
ISSN	10706631
e-ISSN	10897666
DOI	10.1063/5.0064009
Journal	Physics of Fluids
Issue Number	11
Volume Number	33
Language	English
Publisher	HAL CCSD American Institute of Physics
Publisher Date	2021-11-09
Access Restriction	Open
Subject Keyword	Large eddy simulation Turbulence modeling Pressure diffusion Reynolds-stress budgets Fluids mechanics [physics.class-ph] Engineering Sciences [physics] Mechanics [physics.med-ph]
Content Type	Text
Resource Type	Article
Subject	Fluid Flow and Transfer Processes Physics and Astronomy Mechanics of Materials Condensed Matter Physics Mechanical Engineering Computational Mechanics

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