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Viscous Drag Reduction with Surface-Embedded Grooves

  • Jovan Jovanović
  • Bettina Frohnapfel
  • Antonio Delgado
Part of the Notes on Numerical Fluid Mechanics and Multidisciplinary Design book series (NNFM, volume 110)

Abstract

Turbulent drag reduction in wall-bounded flows is investigated experimentally by considering the dynamic effects provoked by large variation of anisotropy in the velocity fluctuations. Deductions based on the analysis of near-wall turbulence lead to the design of the grooved surface topology, for which it is demonstrated experimentally that it can produce a maximum drag reduction of DR ≃ 25%. The drag reduction effect persisted in a narrow range of flow velocities and for the reported experimental conditions corresponds to groove dimensions of about 0.8 viscous length-scale.

Keywords

Wall Shear Stress Drag Reduction Turbulent Dissipation Rate Turbulence Anisotropy Maximum Drag Reduction 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    Frohnapfel, B.: Flow control of near-wall turbulence. PhD thesis, University Erlangen-Nuremberg. Shaker Verlag, Aachen (2007)Google Scholar
  2. 2.
    Frohnapfel, B., Jovanović, J., Delgado, A.: Experimental investigation of turbulent drag reduction by surface embedded grooves. J. Fluid Mech. 590, 107–116 (2007)zbMATHCrossRefGoogle Scholar
  3. 3.
    Frohnapfel, B., Lammers, P., Jovanović, J., Durst, F.: Interpretation of the mechanism associated with turbulent drag reduction in terms of anisotropy invariants. J. Fluid Mech. 577, 457–466 (2007)zbMATHCrossRefGoogle Scholar
  4. 4.
    Jovanović, J., Hillerbrand, R.: On the peculiar property of the velocity fluctuations in wall-bounded flows. Thermal Science 9, 3–12 (2005)CrossRefGoogle Scholar
  5. 5.
    Lee, K.H., Cortelezzi, L., Kim, J., Speyer, J.: Application of reduced-order controller to turbulent flows for drag reduction. Phys. Fluids 13, 1321 (2001)CrossRefGoogle Scholar
  6. 6.
    Lumley, J.L.: Computational modelling of turbulent flows. Adv. Appl. Mech. 18, 123–176 (1978)zbMATHCrossRefMathSciNetGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • Jovan Jovanović
    • 1
  • Bettina Frohnapfel
    • 2
  • Antonio Delgado
    • 1
  1. 1.Institute of Fluid MechanicsFriedrich-Alexander University Erlangen-NürnbergErlangenGermany
  2. 2.Center of Smart InterfacesDarmstadt University of TechnologyDarmstadtGermany

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