Abonnement à la biblothèque: Guest
THMT-18. Turbulence Heat and Mass Transfer 9 Proceedings of the Ninth International Symposium On Turbulence Heat and Mass Transfer
July, 10-13, 2018, Rio de Janeiro, Brazil

DOI: 10.1615/THMT-18


ISBN Print: 978-1-56700-468-7

ISBN Online: 978-1-56700-467-0

ISSN Print: 2377-2816

Small scale entrainment characteristics in high Reynolds number jets and wakes

pages 183-187
DOI: 10.1615/THMT-18.140
Get accessGet access

RÉSUMÉ

The characteristics of the turbulent/non-turbulent interface (TNTI) that occurs at the edges of free shear layers such as mixing layers, jets and wakes, and also in boundary layers, is analysed through new high resolution direct numerical simulations (DNS) of planar turbulent jets and wakes (PJET and PWAKE). It is shown that provided the Reynolds number is above a certain threshold Reλ > 200, thickness of the viscous dominated sublayer, known as viscous superlayer (VSL - δν) as that of the entire turbulent/non-turbulent interface layer (TNTI - δω) both scale with the Kolmogorov micro-scale. The differences and similarities between the TNTIs from jets and wakes, as well how these affect the dynamics of the nearby vorticity, is discussed.

Portail numérique Bibliothèque numérique eBooks Revues Références et comptes rendus Collections Prix et politiques d'abonnement Begell House Contactez-nous Language English 中文 Русский Português German French Spain