Journal
PHYSICS OF FLUIDS
Volume 28, Issue 3, Pages -Publisher
AIP Publishing
DOI: 10.1063/1.4942959
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Funding
- JSPS KAKENHI Grant [25002531]
- MEXT KAKENHI Grant [25289030, 25289031]
- Fundacao para a Ciencia e a Tecnologia (FCT), through IDMEC, under LAETA [PTDC/EME-MFE/122849/2010, UID/EMS/50022/2013]
- Fundação para a Ciência e a Tecnologia [PTDC/EME-MFE/122849/2010] Funding Source: FCT
- Grants-in-Aid for Scientific Research [25289030, 25289031, 13J02531] Funding Source: KAKEN
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Lagrangian statistics obtained from direct numerical simulations of turbulent planar jets and mixing layers are reported for the separation distance between the tracer particles at the outer edge of the turbulent/non-turbulent interface layer, and the entrained fluid particles. In the viscous superlayer (VSL) the mean square particle distance exhibits a ballistic evolution, while the Richardson-like scaling for relative dispersion prevails inside the turbulent sublayer (TSL). The results further support the existence of two different regimes within the interface layer, where small-scale outward enstrophy diffusion governs the entrained particles in the VSL, while inviscid small-scale motions govern the TSL. (C) 2016 AIP Publishing LLC.
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