Polymers and Plastrons in Parallel Yield Enhanced Turbulent Drag Reduction
Name
fluids-05-00197-v2.pdf
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4.25 MB
Format
Adobe PDF
Checksum (MD5)
6fe5ab88c1b7550f881dd2a93a97f8ec
Author(s)
Rajappan, Anoop
McKinley, Gareth H.
Date Issued
November 1, 2020
Publisher
Multidisciplinary Digital Publishing Institute
Citation
Fluids 5 (4): 197 (2020)
Version
Final published version
Abstract
Despite polymer additives and superhydrophobic walls being well known as stand-alone methods for frictional drag reduction in turbulent flows, the possibility of employing them simultaneously in an additive fashion has remained essentially unexplored. Through experimental friction measurements in turbulent Taylor–Couette flow, we show that the two techniques may indeed be combined favorably to generate enhanced levels of frictional drag reduction in wall-bounded turbulence. We further propose an additive expression in Prandtl–von Kármán variables that enables us to quantitatively estimate the magnitude of this cooperative drag reduction effect for small concentrations of dissolved polymer.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Hatsopoulos Microfluids Laboratory (Massachusetts Institute of Technology)
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Creative Commons Attribution
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DOI of Published Version
https://doi.org/10.3390/fluids5040197
