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DNS for Turbulent Drag Reduction at \({Re_\tau }=1600\)

  • Yongmann M. ChungEmail author
  • Edward Hurst
  • Qiang Yang
Conference paper
Part of the Lecture Notes in Mechanical Engineering book series (LNME)

Abstract

This study considers the skin friction drag reduction of turbulent flow at high Reynolds numbers. A recent DNS study of flow control found that drag reduction became less effective as the Reynolds number increased from \({Re_\tau }=200\) to 1600 (Hurst et al. 2014). To investigate this Reynolds number effect, the drag reduction of the stationary waves is decomposed into laminar and turbulent components, and the turbulent contribution is further decomposed into inner and outer regions. The current analysis based on the Reynolds number up to \({Re_\tau }=1600\) appears to suggest that the Reynolds number effect on the drag reduction could be relatively modest than suggested in the previous studies, and this could mean that a significant drag reduction could be achieved at a flight condition.

Keywords

Flow control Drag reduction Reynolds number effect Stationary waves Direct numerical simulation 

Notes

Acknowledgments

This work was supported by the EPSRC, Airbus Operations Ltd and EADS UK Ltd (EP/G060215/1). This work has also received support from European commission FP7 project AirPROM (Grant Agreement FP7 270194, www.airprom.eu), and the EPSRC through the UK Turbulence Consortium (EP/G069581/1). This work used the HECToR and ARCHER, The UK National Supercomputing Service (http://www.archer.ac.uk).

References

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Copyright information

© Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  1. 1.School of Engineering and CSCUniversity of WarwickCoventryUK

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