Journal article
Reynolds-number effects on the outer region of adverse-pressure-gradient turbulent boundary layers
R Deshpande, A Van Den Bogaard, R Vinuesa, L Lindić, I Marusic
Physical Review Fluids | AMER PHYSICAL SOC | Published : 2023
Abstract
We study the Reynolds-number effects on the outer region of moderate adverse-pressure-gradient (APG) turbulent boundary layers (TBLs) and find that their small-scale (viscous) energy reduces with increasing friction Reynolds number (Reτ). The trend is based on analyzing APG TBL data across 600≲Reτ≲7000 and contrasts with the negligible variation in small viscous-scaled energy noted for canonical wall flows. The data sets considered include those from a well-resolved numerical simulation [Pozuelo, J. Fluid Mech. 939, A34 (2022)0022-112010.1017/jfm.2022.221], which provides access to an APG TBL maintained at near-equilibrium conditions across 1000≲Reτ≲ 2000, with a well-defined flow history, a..
View full abstractRelated Projects (2)
Grants
Awarded by Australian Research Council
Funding Acknowledgements
The authors are grateful to Dr. R. Pozuelo for sharing the LES data sets and acknowledge P. Manovski for helpful comments and suggestions on the manuscript. Financial support from the Australian Research Council is gratefully acknowledged. R.D. also acknowledges financial support by the University of Melbourne through the Melbourne Postdoctoral Fellowship. R.V. acknowledges the financial support from ERC Grant No. 2021-CoG-101043998, DEEPCONTROL. Views and opinions expressed are however those of the author (s) only and do not necessarily reflect those of the European Union or the European Research Council. Neither the European Union nor the granting authority can be held responsible for them. The authors made the following contributions: R.D.: writing (original draft), conceptualization, supervision, methodology, validation, investigation, formal analysis; A.v.d.B.: writing (original draft), experiments, investigation, formal analysis, validation; R.V.: conceptualization, methodology, writing (review and editing), resources, investigation; L.L.: writing (review and editing), experimental setup; I.M.: supervision, conceptualization, writing (review and editing), funding acquisition. The authors declare that they have no conflict of interest.