Turbulent boundary layers up to Re-theta=2500 studied through simulation and experiment
2009 (English)In: Physics of fluids, ISSN 1070-6631, E-ISSN 1089-7666, Physics of Fluids, Vol. 21, no 5, 051702- p.Article in journal (Refereed) Published
Direct numerical simulations (DNSs) and experiments of a spatially developing zero-pressure-gradient turbulent boundary layer are presented up to Reynolds number Re-theta=2500, based on momentum thickness theta and free-stream velocity. For the first time direct comparisons of DNS and experiments of turbulent boundary layers at the same (computationally high and experimentally low) Re-theta are given, showing excellent agreement in skin friction, mean velocity, and turbulent fluctuations. These results allow for a substantial reduction of the uncertainty of boundary-layer data, and cross validate the numerical setup and experimental technique. The additional insight into the flow provided by DNS clearly shows large-scale turbulent structures, which scale in outer units growing with Re-theta, spanning the whole boundary-layer height.
Place, publisher, year, edition, pages
2009. Vol. 21, no 5, 051702- p.
boundary layer turbulence, flow simulation, wall-shear-stress, region, flows
Engineering and Technology
IdentifiersURN: urn:nbn:se:kth:diva-18466DOI: 10.1063/1.3139294ISI: 000266500500002ScopusID: 2-s2.0-66849124872OAI: oai:DiVA.org:kth-18466DiVA: diva2:336513
QC 201507212010-08-052010-08-052015-07-21Bibliographically approved