Conference Proceedings

Turbulence Production in the Low Polymer Drag Reduction Regime

John Elsnab, Christopher White, Joseph Klewicki, Ramis Örlü, Alessandro Talamelli, Joachim Peinke, Martin Oberlack

Springer Proceedings in Physics | Springer Nature | Published : 2019

Abstract

Streamwise velocity profiles and their wall-normal derivatives were used to investigate the properties of turbulent channel flow in the low polymer drag reduction (DR) regime, DR=6.5 – 26%. Streamwise velocity data were obtained over a friction Reynolds number ranging from 650 to 1800 using the single velocity component version of molecular tagging velocimetry (1c-MTV). This adaptation of the MTV technique has the ability to accurately capture instantaneous profiles at very high spatial resolution, and thus generate well-resolved derivative information as well. Owing to this ability, the present study is able to build upon and extend the recent numerical simulation analysis of White et al. ..

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