DOI:             10.7795/720.20260807
resource type:   Dataset / Measurement data
title:           Three-component normalized mean velocity and turbulence intensity pipe flow profiles
description:     Streamwise, wall-normal and spanwise velocity statistics of turbulent pipe flow measured in a DN 100 pipe using a laser Doppler velocimeter (LDV) at the Gravimetric Thermal Energy Standard (GraTESt) in the
Physikalisch-Technische Bundesanstalt, Berlin. To normalize the velocity measurement data obtained by LDV, the friction velocity was determined through measurement of the pressure drop along the pipe test section while the bulk velocity was determined through the gravimetric method.
related objects: The dataset is discussed in "Reynolds number effects and facility-to-facility consistency of three-component turbulence statistics in pipe flow up to Reτ ≈ 66 000" (Journal of Fluid Mechanics, 2026, under review). For details of the measurement methodology, readers are referred to this paper.
creators:
  - given name:  Marie
    family name: Ono
    ORCID:       0000-0002-9869-499X
    Affiliation: National Institute of Advanced Industrial Science and Technology, National Metrology Institute of Japan (NMIJ), Tsukuba, Japan
  - given name:  Felix
    family name: Heitmann
    ORCID:       0009-0004-6477-7668
    Affiliation: Physikalisch-Technische Bundesanstalt (PTB), Berlin, Germany
    PTB FB: 7.5
  - given name:  Hannes
    family name: Krüger
    ORCID:       0009-0005-4667-2747
    Affiliation: Physikalisch-Technische Bundesanstalt (PTB), Berlin, Germany
    PTB FB: 7.5
  - given name:  Noriyuki
    family name: Furuichi
    ORCID:       0000-0002-4845-9051
    Affiliation: National Institute of Advanced Industrial Science and Technology, National Metrology Institute of Japan (NMIJ), Tsukuba, Japan

funding:
  funder name:                  Japanese Society for the Promotion of Science (JSPS)
  funding program:              JSPS KAKENHI
  funding nr:                   23KK0264
  project acronym:              
  project long title:           高レイノルズ数円管乱流における乱流標準と普遍則の確立
  link to projekt homepage:     https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23KK0264/
  funding acknowledgement text: This research was partially supported by JSPS KAKENHI grant number JP 23KK0264

license:        Creative Commons 4.0 international
keywords:       boundary layer turbulence, pipe flow, fluid dynamics
classification: INSPEC A4725F - Boundary layer and shear turbulence

description of the individual files:
  - block:                Streamwise
    research object:      Normalized streamwise mean velocity and turbulence intensity
    method:               The LDV measuring volume was oriented to measure only the streamwise velocity component.
    format:               All files are in the .csv-format and use the tab character to separate columns
    recommended software: All files are readable with standard text editors
  - block:                Spanwise
    research object:      Normalized spanwise turbulence intensity
    method:               The LDV measuring volume was oriented to measure only the spanwise velocity component.
    format:               All files are in the .csv-format and use the tab character to separate columns
    recommended software: All files are readable with standard text editors
  - block:                Wall-normal
    research object:      Normalized wall-normal turbulence intensity
    method:               The LDV measuring volume was oriented to measure only the wall-normal velocity component.
    format:               All files are in the .csv-format and use the tab character to separate columns
    recommended software: All files are readable with standard text editors