High-resolution velocity measurement in the inner part of turbulent boundary layers over super-hydrophobic surfaces
Author(s)
Ling, Hangjian
Golovin, Kevin
Tuteja, Anish
Katz, Joseph
Srinivasan, Siddarth
McKinley, Gareth H
Date Issued
August 2016
Journal
Journal of Fluid Mechanics
Publisher
Cambridge University Press (CUP)
Citation
Ling, Hangjian et al. “High-Resolution Velocity Measurement in the Inner Part of Turbulent Boundary Layers over Super-Hydrophobic Surfaces.” Journal of Fluid Mechanics 801 (July 2016): 670–703 © 2016 Cambridge University Press
Version
Author's final manuscript
Abstract
Digital holographic microscopy is used for characterizing the profiles of mean velocity, viscous and Reynolds shear stresses, as well as turbulence level in the inner part of turbulent boundary layers over several super-hydrophobic surfaces (SHSs) with varying roughness/texture characteristics. The friction Reynolds numbers vary from 693 to 4496, and the normalized root mean square values of roughness vary from 0.43 to 3.28. The wall shear stress is estimated from the sum of the viscous and Reynolds shear stress at the top of roughness elements and the slip velocity is obtained from the mean profile at the same elevation. For flow over SHSs with
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Terms of Use
Creative Commons Attribution-Noncommercial-Share Alike
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1017/JFM.2016.450
