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Memorias de investigación
Research Publications in journals:
Vorticity organization in the outer layer of turbulent channels with disturbed walls
Year:2007
Research Areas
  • Fluid mechanics
Information
Abstract
The vortex clusters in the turbulent outer region of rough- and smooth-walled channels, and their associated velocity structures, are compared using data from numerical experiments at friction Reynolds numbers Re-tau <= 674. The results indicate that the roughness of the wall does not affect their properties, particularly the existence of wall-detached and wall-attached populations, and the self-similar size distribution of the latter. The average flow field conditioned to the attached clusters reveals similar conical structures of low streamwise velocity for the rough- and smooth-walled cases, which eventually grow into the global modes previously identified from spectral analysis. We conclude that the vortex clusters of the turbulent outer region either originate away from the wall, or quickly forget their origin, in agreement with Townsend's similarity hypothesis.
International
Si
JCR
Si
Title
J FLUID MECH
ISBN
0022-1120
Impact factor JCR
2,026
Impact info
Volume
591
Journal number
0
From page
145
To page
154
Month
NOVIEMBRE
Ranking
Participants
  • Autor: Oscar Flores Arias (UPM)
  • Autor: Javier Jimenez Sendin (UPM)
  • Autor: Juan Carlos Del Alamo de Pedro (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Mecánica de Fluidos Computacional
  • Departamento: Motopropulsión y Termofluidodinámica
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