Near-Wall Turbulence in a Localized Puff in a Pipe

  • Alexander YakhotEmail author
  • Yuri Feldman
  • David Moxey
  • Spencer Sherwin
  • George Em Karniadakis
Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 226)


We have performed direct numerical simulations of a transitional flow in a pipe for \(Re_m=2250\) when turbulence manifests in the form of fleshes (puffs). From experiments and simulations, \(Re_m \approx 2250\) has been estimated as a threshold when the average speeds of upstream and downstream fronts of a puff are identical (Song et al. in J Fluid Mech 813:283–304, 2017, [1]). The flow regime upstream of its trailing edge and downstream of its leading edge is almost laminar. To collect the velocity data, at each time instance, we followed a turbulent puff by a three-dimensional moving window centered at the location of the maximum energy of the transverse (turbulent) motion. In the near-wall region, despite the low Reynolds number, the turbulence statistics, in particular, the distribution of turbulence intensities and Reynolds shear stress becomes similar to a fully-developed turbulent pipe flow.


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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Alexander Yakhot
    • 1
    Email author
  • Yuri Feldman
    • 1
  • David Moxey
    • 2
  • Spencer Sherwin
    • 3
  • George Em Karniadakis
    • 4
  1. 1.Department of Mechanical EngineeringBen-Gurion UniversityBeershevaIsrael
  2. 2.College of Engineering, Mathematics and Physical SciencesUniversity of ExeterExeterUK
  3. 3.Department of AeronauticsImperial College LondonLondonUK
  4. 4.Division of Applied MathematicsBrown UniversityProvidenceUSA

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