Near-wall measurements of turbulence statistics in a fully developed channel flow with a novel laser Doppler velocity profile sensor

Katsuaki Shirai, Christian Bayer, Andreas Voigt, Thorsten Pfister, Lars Büttner, Jürgen Czarske

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

This paper reports on the measurements of the near-wall turbulence statistics in a fully developed channel flow. The flow measurements were carried out with a novel laser Doppler velocity profile sensor with a high spatial resolution. The sensor provides both the information of velocity and position of individual tracer particles inside the measurement volume. Hence, it yields the velocity profile inside the measurement volume, in principle, without the sensor being mechanically traversed. Two sensor systems were realized with different techniques. Typically the sensor has a relative accuracy of velocity measurement of 10-3 and the spatial resolution of a few micrometers inside the measurement volume of about 500 μm long. The streamwise velocity was measured with two independent sensor systems at three different Reynolds number conditions. The resulting turbulence statistics show a good agreement with available data of direct numerical simulations up to fourth order moment. This demonstrates the velocity profile sensor to be one of the promising techniques for turbulent flow research with the advantage of a spatial resolution more than one magnitude higher than a conventional laser Doppler technique.

Original languageEnglish
Pages (from-to)567-578
Number of pages12
JournalEuropean Journal of Mechanics, B/Fluids
Volume27
Issue number5
DOIs
Publication statusPublished - 2008 Sep
Externally publishedYes

Fingerprint

channel flow
Channel flow
Turbulence
velocity distribution
turbulence
Statistics
statistics
Lasers
sensors
Volume measurement
Sensors
lasers
spatial resolution
flow measurement
Direct numerical simulation
Flow measurement
direct numerical simulation
velocity measurement
Velocity measurement
turbulent flow

Keywords

  • Channel flow
  • Laser Doppler
  • Near wall
  • Spatial resolution
  • Turbulence statistics
  • Turbulent flow
  • Velocity profile
  • Velocity profile sensor

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

Near-wall measurements of turbulence statistics in a fully developed channel flow with a novel laser Doppler velocity profile sensor. / Shirai, Katsuaki; Bayer, Christian; Voigt, Andreas; Pfister, Thorsten; Büttner, Lars; Czarske, Jürgen.

In: European Journal of Mechanics, B/Fluids, Vol. 27, No. 5, 09.2008, p. 567-578.

Research output: Contribution to journalArticle

Shirai, Katsuaki ; Bayer, Christian ; Voigt, Andreas ; Pfister, Thorsten ; Büttner, Lars ; Czarske, Jürgen. / Near-wall measurements of turbulence statistics in a fully developed channel flow with a novel laser Doppler velocity profile sensor. In: European Journal of Mechanics, B/Fluids. 2008 ; Vol. 27, No. 5. pp. 567-578.
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