Streamwise Auto-Correlation Analysis in Turbulent Pipe Flow Using Particle Image Velocimetry at High Reynolds Numbers

  • Emir ÖngünerEmail author
  • El-Sayed Zanoun
  • Christoph Egbers
Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 196)


This preliminary study focuses on determining the lengths of turbulent pipe flow structures at \(\textit{Re}_{b} \approx 60,000\) and 140, 000 using auto-correlation analysis in streamwise direction considering velocity fluctuations, where \(\textit{Re}_{b}\) is the Re-number based on bulk velocity. These structures are usually represented in terms of wavelengths \(\lambda \) or wavenumbers k. The current investigations on such turbulent structures including both large-scale motions (LSM) and very large-scale motions (VLSM) showed that the streamwise extension of these structures is highly dependent on the Reynolds number. Hence, the Cottbus large pipe (CoLaPipe) as a high Reynolds number test facility is being used to understand the physical processes and dynamics of such structures. These turbulence structures have been investigated using particle image velocimetry (PIV) to validate and compare earlier results obtained utilizing hot-wire anemometry (HWA).



This work was supported by LaVision GmbH. We gratefully acknowledge many useful discussions with Mirko Dittmar and Peter Meyer. The authors are supported by the DFG-German Research Foundation as a part of the FOR1182 and SPP1881 (Grant No. EG100/24-1) project. CoLaPipe facility is used as a part of the EuHIT (European High-Performance Infrastructures in Turbulence) program.


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Copyright information

© Springer International Publishing AG 2017

Authors and Affiliations

  • Emir Öngüner
    • 1
    Email author
  • El-Sayed Zanoun
    • 1
    • 2
  • Christoph Egbers
    • 1
  1. 1.Department of Aerodynamics and Fluid MechanicsBrandenburg University of TechnologyCottbusGermany
  2. 2.Faculty of EngineeringBenha UniversityBenhaEgypt

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