PIV measurements in near-wake turbulent regions

Wei Cheng Chen; Keh Chin Chang

doi:10.1142/S0217984918400262

PIV measurements in near-wake turbulent regions

Wei Cheng Chen, Keh Chin Chang

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

Particle image velocimetry (PIV) is a non-intrusive optical diagnostic and must be made of the seedings (foreign particles) instead of the fluid itself. However, reliable PIV measurement of turbulence requires sufficient numbers of seeding falling in each interrogation window of image. A gray-level criterion is developed in this work to check the attainment of statistically stationary status of turbulent flow properties. It is suggested that the gray level of no less than 0.66 is used as the threshold for reliable PIV measurements in the present near-wake turbulent regions.

Original language	English
Article number	1840026
Journal	Modern Physics Letters B
Volume	32
Issue number	12-13
DOIs	https://doi.org/10.1142/S0217984918400262
Publication status	Published - 2018 May 10

All Science Journal Classification (ASJC) codes

Statistical and Nonlinear Physics
Condensed Matter Physics

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10.1142/S0217984918400262

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title = "PIV measurements in near-wake turbulent regions",

abstract = "Particle image velocimetry (PIV) is a non-intrusive optical diagnostic and must be made of the seedings (foreign particles) instead of the fluid itself. However, reliable PIV measurement of turbulence requires sufficient numbers of seeding falling in each interrogation window of image. A gray-level criterion is developed in this work to check the attainment of statistically stationary status of turbulent flow properties. It is suggested that the gray level of no less than 0.66 is used as the threshold for reliable PIV measurements in the present near-wake turbulent regions.",

author = "Chen, {Wei Cheng} and Chang, {Keh Chin}",

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AU - Chang, Keh Chin

N1 - Funding Information: This study was done with the financial support by Ministry of Science and Technology of R.O.C. under Grant No. NSC 103-2923-E006-005-MY3. Publisher Copyright: © 2018 World Scientific Publishing Company.

PY - 2018/5/10

Y1 - 2018/5/10

N2 - Particle image velocimetry (PIV) is a non-intrusive optical diagnostic and must be made of the seedings (foreign particles) instead of the fluid itself. However, reliable PIV measurement of turbulence requires sufficient numbers of seeding falling in each interrogation window of image. A gray-level criterion is developed in this work to check the attainment of statistically stationary status of turbulent flow properties. It is suggested that the gray level of no less than 0.66 is used as the threshold for reliable PIV measurements in the present near-wake turbulent regions.

AB - Particle image velocimetry (PIV) is a non-intrusive optical diagnostic and must be made of the seedings (foreign particles) instead of the fluid itself. However, reliable PIV measurement of turbulence requires sufficient numbers of seeding falling in each interrogation window of image. A gray-level criterion is developed in this work to check the attainment of statistically stationary status of turbulent flow properties. It is suggested that the gray level of no less than 0.66 is used as the threshold for reliable PIV measurements in the present near-wake turbulent regions.

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PIV measurements in near-wake turbulent regions

Abstract

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