Structure Investigation in Pipe Flow at High Reynolds Numbers

  • Emir ÖngünerEmail author
  • El-Sayed Zanoun
  • Franziska König
  • Christoph Egbers
Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 165)


For linear stable shear flows, turbulent pipe flow has been investigated for different Re-numbers. Turbulence can be achieved in natural or artificial methods. For transitions some perturbations are needed to trigger turbulence and some structures as puffs and slugs can be observed. In last decades the so called large-scale motions (LSM), which are composed of detached eddies with wide range of azimuthal scales in the outer layer, are identified. Advanced versions of LSMs, the very large-scale motions (VLSM), have radial scales. The VLSMs are concentrated around a single azimuthal mode and make a smaller angle with the wall compared to the LSM. These above mentioned phenomena will be investigated at high Reynolds numbers in the pipe facility Cottbus-Large Pipe at BTU Cottbus-Senftenberg (CoLa-Pipe) which provides a bulk Reynolds number of \(Re_{m} \le 1,5\times 10^{6}\). Zimmer et al. [1] and König et al. [2] provide an outline for conditions of fully developed turbulent flow state with natural as well as artificial transition. Considering these fully developed flow conditions at CoLa-Pipe, next investigations will be primarily focused on the structures in boundary layer in terms of LSM and VLSM by using hot wire anemometry and PIV. The main aim of this work will be analysing the lengths of structures at high Re-numbers in terms of their wavelengths and comparing with those of low Re-numbers regions.


Turbulent Kinetic Energy Pipe Flow Reynolds Shear Stress Frequency Converter Turbulent Pipe Flow 
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Copyright information

© Springer International Publishing Switzerland 2016

Authors and Affiliations

  • Emir Öngüner
    • 1
    Email author
  • El-Sayed Zanoun
    • 2
  • Franziska König
    • 3
  • Christoph Egbers
    • 1
  1. 1.Department of Aerodynamics and Fluid MechanicsBrandenburg University of TechnologyCottbusGermany
  2. 2.Department of Mechanical EngineeringBenha UniversityNew BenhaEgypt
  3. 3.Department of Metallurgy and Materials EngineeringBrandenburg University of TechnologyCottbusGermany

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