Media type: E-Article Title: High‐Reynolds‐number effects on turbulent scalings in compressible channel flow Contributor: Modesti, Davide; Bernardini, Matteo; Pirozzoli, Sergio Published: Wiley, 2015 Published in: PAMM, 15 (2015) 1, Seite 489-490 Language: English DOI: 10.1002/pamm.201510235 ISSN: 1617-7061 Keywords: General Medicine Origination: Footnote: Description: AbstractThe effect of the Reynolds number in a supersonic isothermal channel flow is studied using a direct numerical simulation (DNS). The bulk Mach number based on the wall temperature is 1.5, and the bulk Reynolds number is increased up to Reτ ≈︁ 1000. The use of van Driest velocity transformation in the presence of heated walls has been questioned due to the poor accuracy at low Reynolds number. For this reason alternative transformations of the velocity profile and turbulence statistics have been proposed, as, for instance, semi‐local scalings. We show that the van Driest transformation recovers its accuracy as the Reynolds number is increased. The Reynolds stresses collapse on the incompressible ones, when properly scaled with density, and very good agreement with the incompressible stresses is found in the outer layer. (© 2015 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim) Access State: Open Access