Sixth International Symposium on Turbulence and Shear Flow Phenomena
DOI: 10.1615/TSFP6
DIRECT QUANTITATIVE MEASUREMENT OF THE LIFE TIME OF LOCALIZED TURBULENCE IN PIPE FLOW
pages 132-137
DOI: 10.1615/TSFP6.210
摘要
In pipe flow at low Reynolds number, decay of localized turbulent structures is observed. As the Reynolds number is increased, the question emerges whether the life time of these structures diverges at a finite Reynolds number or remains transient. In the current investigation we determine the life time of localized structures quantitatively from pressure measurements, while in previous investigations the distance over which a structure survived has been determined. The obtained results confirm that the life time of localized turbulent structures does not diverge for this Reynolds number regime.