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Large Scale Motions and Shear Stress Fluctuations in Turbulent Shear Flow

[+] Author Affiliations
Hinori Ito, Tatsuya Tsuneyoshi, Takahiro Ito, Yoshiyuki Tsuji

Nagoya University, Nagoya city, Japan

Shan Feng

Huazhong University of Science and Technology, Wuhan, China

Yuya Hideki

Chubu Electric Power Co., Inc., Nagoya city, Japan

Paper No. AJKFluids2015-25625, pp. V01AT25A010; 3 pages
  • ASME/JSME/KSME 2015 Joint Fluids Engineering Conference
  • Volume 1A: Symposia, Part 2
  • Seoul, South Korea, July 26–31, 2015
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 978-0-7918-5721-3
  • Copyright © 2015 by JSME


We simultaneously measured the flow field and wall shear stress in a straight pipe and behind an orifice by means of particle image velocimetry (PIV) and the limiting diffusion current technique (LDCT), respectively[1]. The spatio-temporal correlation coefficients of the local vertical velocity and the shear stress fluctuations are presented, and the canonical correlations between the proper orthogonal decomposition (POD) spatial eigenmodes in the recirculation region and the wall shear stress are also discussed[2]. A response time lag occurs between the wall shear stress and the velocity field. The large canonical correlation between the POD eigenmodes and wall shear stress suggests that large-scale flow structures are important for the shear stress fluctuation. These analyses are applied to the shear flow in channel and large scale motions are studied in relation with the shear stress fluctuations.

Copyright © 2015 by JSME



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