Performance prediction for optical wall shear stress sensor using direct numerical simulation of fluid flow

Katsuaki Shirai, Keisuke Tsuru, Shinnosuke Obi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We conducted a performance prediction for an optical wall shear stress sensor with using the velocity data of a direct numerical simulation. The Doppler signals were generated with respect to the path of tracer particles passing through the measurement volume. A signal processing technique was proposed to estimate the magnitude and yaw angle of local wall shear stress simultaneously from each Doppler signal. The simulated Doppler signals were processed with the technique, however the accuracy of estimating the yaw angle is not sufficient. In contrast, the estimated magnitude of wall shear stress showed a good agreement with the direct estimate from the DNS data if the yaw angle was accurately estimated. The measurement accuracy of the sensor mainly depends on estimating the yaw angle of each tracer particle. Another technique for detecting the yaw angle is needed for the accurate measurement of both the yaw angle and magnitude of local wall shear stress.

Original languageEnglish
Title of host publicationProceedings of the ASME/JSME Joint Fluids Engineering Conference
EditorsA. Ogut, Y. Tsuji, M. Kawahashi, A. Ogut, Y. Tsuji, M. Kawahashi
Pages75-80
Number of pages6
Volume1 A
Publication statusPublished - 2003
Event4th ASME/JSME Joint Fluids Engineering Conference - Honolulu, HI, United States
Duration: 2003 Jul 62003 Jul 10

Other

Other4th ASME/JSME Joint Fluids Engineering Conference
CountryUnited States
CityHonolulu, HI
Period03/7/603/7/10

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ASJC Scopus subject areas

  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

Cite this

Shirai, K., Tsuru, K., & Obi, S. (2003). Performance prediction for optical wall shear stress sensor using direct numerical simulation of fluid flow. In A. Ogut, Y. Tsuji, M. Kawahashi, A. Ogut, Y. Tsuji, & M. Kawahashi (Eds.), Proceedings of the ASME/JSME Joint Fluids Engineering Conference (Vol. 1 A, pp. 75-80)