On the scaling of turbulent separating boundary layers
2008 (English)In: Physics of fluids, ISSN 1070-6631, E-ISSN 1089-7666, Vol. 20, no 7, 075104-1-075104-4 p.Article in journal (Refereed) Published
This study focuses on the mean velocity distribution of turbulent boundary layers near, at, and after separation. The proper mean velocity scaling of the outer region in strong adverse pressure gradients and separated turbulent boundary layers is still under debate and over the years various different velocity scales have been proposed. Here the scaling proposed by Zagarola and Smits [J. Fluid Mech. 373, 33 (1998)] is applied to data from three different separated flows. In all cases the mean velocity defect profiles are self-similar in the region between separation and the position of maximum mean reverse flow. Downstream of the reverse flow maximum, the profiles change, but they are still self-similar within that region. It was also found that the mean velocity defect profiles of all three pressure gradients show similarity in the region between separation and the position of maximum mean reverse flow.
Place, publisher, year, edition, pages
2008. Vol. 20, no 7, 075104-1-075104-4 p.
Aerodynamics; Boundary layer flow; Boundary layers; Gradient methods; Hydrodynamics; Isomers; Meteorology; Pressure gradient; Separation; Turbulent flow; Adverse pressure gradients; Different velocity; Mean velocities; Mean velocity distributions; Pressure gradients; Reverse flow; Self-similar; Separated flows; Turbulent boundary layers
Fluid Mechanics and Acoustics
IdentifiersURN: urn:nbn:se:kth:diva-9833DOI: 10.1063/1.2958317ISI: 000258175600027ScopusID: 2-s2.0-48849110214OAI: oai:DiVA.org:kth-9833DiVA: diva2:133491
QC 201008252009-01-122009-01-122010-08-25Bibliographically approved