# Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
Time-resolved evolution of wall-bounded direct and inverse cascades in turbulent channels at Re$_\tau=4000$
Year:2013
Research Areas
• Turbulence
Information
Abstract
The temporal evolution of the structures responsible for the momentum transfer in a turbulent channel at Re_? = 4000 is studied using DNS sequences with temporal separations among fields short enough for individual objects to be tracked. Direct and inverse physical cascades are associated with the process of structures splitting and merging respectively. It is found that the direct cascade predominates, but both directions are roughly comparable. Most of the merged and split fragments have small sizes of the order of some Kolmogorov units. However, an inertial self-similar process is found in which the structures merge and split in fragments of comparable sizes. Finally, a link is established between places with high Reynolds stresses and the predominance of either the direct or the inverse cascade.
International
Si
Congress
European Turbulence Conference 14
960
Place
Lyon (Francia)
Reviewers
Si
ISBN/ISSN
0000-0000
Start Date
01/09/2013
End Date
04/09/2013
From page
0
To page
0
Time-resolved evolution of wall-bounded direct and inverse cascades in turbulent channels at Re$_\tau=4000$
Participants
• Autor: Adrian Lozano Duran (UPM)
• Autor: Javier Jimenez Sendin (UPM)
Research Group, Departaments and Institutes related
• Creador: Grupo de Investigación: Mecánica de Fluidos Computacional
S2i 2020 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)