Dynamics of turbulent spots in transitional boundary layer

The turbulent spots appearance, topology and dynamics on a flat-plate boundary layer in zero pressure gradient during its transition to turbulence is investigated experimentally using time-resolved PIV technique. The intermittently appearing turbulent spots are subjected to detailed study. The hairp...

Full description

Saved in:
Bibliographic Details
Published in:Journal of physics. Conference series 2011-12, Vol.318 (3), p.032028-5
Main Authors: Hladík, O, Jonáš, P, Uruba, V
Format: Article
Language:English
Subjects:
Boundary layer
Boundary layer transition
Dynamic tests
Dynamics
Elongated structure
Fluid dynamics
Fractal analysis
Physics
Spots
Streak
Topology
Turbulence
Turbulent boundary layer
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The turbulent spots appearance, topology and dynamics on a flat-plate boundary layer in zero pressure gradient during its transition to turbulence is investigated experimentally using time-resolved PIV technique. The intermittently appearing turbulent spots are subjected to detailed study. The hairpin packets organized in regular streamwise rows having fractal structure in the same time are identified in spots. Elongated vortical structures have been recognized in the spots rear-part. The calmed region is characterized by presence of low-velocity streaks originating between the elongated structures.
ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/318/3/032028