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. [6] that examined the mean dynamical structure of polymer drag reduced channel flow at friction Reynolds numbers up to 1000.
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Acknowledgements
This study was supported by Australian Research Council grant numbers DP120101467 and LE130100088.
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Elsnab, J.R., White, C.M., Klewicki, J.C. (2019). Turbulence Production in the Low Polymer Drag Reduction Regime. In: Örlü, R., Talamelli, A., Peinke, J., Oberlack, M. (eds) Progress in Turbulence VIII. iTi 2018. Springer Proceedings in Physics, vol 226. Springer, Cham. https://doi.org/10.1007/978-3-030-22196-6_17
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DOI: https://doi.org/10.1007/978-3-030-22196-6_17
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