Measurements of near wall velocity and wall stress in awall-bounded turbulent flow using digital holographic microscopic PIV and shear stress sensitive film

Omid Amili; Julio Soria

doi:10.1007/978-90-481-9603-6_40

Measurements of near wall velocity and wall stress in awall-bounded turbulent flow using digital holographic microscopic PIV and shear stress sensitive film

Omid Amili, Julio Soria

Aerospace Engineering and Mechanics

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

In wall-bounded turbulent flows, a large portion of total turbulence production happens in the near wall region. Although the viscous and buffer layers are relatively easy for numerical simulations due to local low Reynolds numbers of the important structures, they are very difficult to study experimentally because of their physically small geometry. The aim of this paper is to measure the wall shear stress in a fully developed turbulent channel flow at moderately high Reynolds numbers using a novel stress meter which is capable of measuring surface forces over an extended region of the model. In addition, near wall region in a wall-bounded flow by means of digital holographic microscopic particle image velocimetry will be investigated. DHMPIV provides a solution to overcome the poor axial accuracy and the low spatial resolution. The paper addresses the experimental techniques, articulate calibration procedure, data acquisition, and analysis procedure.

Original language	English (US)
Title of host publication	Progress in Wall Turbulence
Subtitle of host publication	Understanding and Modeling - Proceedings of the WALLTURB International Workshop, 2009
Editors	Michel Stanislas, Javier Jimenez, Ivan Marusic
Publisher	Springer Netherland
Pages	385-392
Number of pages	8
ISBN (Print)	9789048196029
DOIs	https://doi.org/10.1007/978-90-481-9603-6_40
State	Published - 2011
Event	International Workshop on Understanding and Modelling of Wall Turbulence, 2009 - Lille, France Duration: Apr 21 2009 → Apr 23 2009

Publication series

Name	ERCOFTAC Series
Volume	14
ISSN (Print)	1382-4309
ISSN (Electronic)	2215-1826

Other

Other	International Workshop on Understanding and Modelling of Wall Turbulence, 2009
Country/Territory	France
City	Lille
Period	4/21/09 → 4/23/09

Bibliographical note

Funding Information:
The financial support to conduct this research by the Australian Research Council is appreciatively acknowledged. In addition, O. Amili was supported by the scholarships provided by Monash Research Graduate School while undertaking this research.

Publisher Copyright:
© Springer Science+Business Media B.V. 2011.

Publisher link

10.1007/978-90-481-9603-6_40

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Amili, O., & Soria, J. (2011). Measurements of near wall velocity and wall stress in awall-bounded turbulent flow using digital holographic microscopic PIV and shear stress sensitive film. In M. Stanislas, J. Jimenez, & I. Marusic (Eds.), Progress in Wall Turbulence: Understanding and Modeling - Proceedings of the WALLTURB International Workshop, 2009 (pp. 385-392). (ERCOFTAC Series; Vol. 14). Springer Netherland. https://doi.org/10.1007/978-90-481-9603-6_40

Measurements of near wall velocity and wall stress in awall-bounded turbulent flow using digital holographic microscopic PIV and shear stress sensitive film. / Amili, Omid; Soria, Julio.
Progress in Wall Turbulence: Understanding and Modeling - Proceedings of the WALLTURB International Workshop, 2009. ed. / Michel Stanislas; Javier Jimenez; Ivan Marusic. Springer Netherland, 2011. p. 385-392 (ERCOFTAC Series; Vol. 14).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Amili, O & Soria, J 2011, Measurements of near wall velocity and wall stress in awall-bounded turbulent flow using digital holographic microscopic PIV and shear stress sensitive film. in M Stanislas, J Jimenez & I Marusic (eds), Progress in Wall Turbulence: Understanding and Modeling - Proceedings of the WALLTURB International Workshop, 2009. ERCOFTAC Series, vol. 14, Springer Netherland, pp. 385-392, International Workshop on Understanding and Modelling of Wall Turbulence, 2009, Lille, France, 4/21/09. https://doi.org/10.1007/978-90-481-9603-6_40

Amili O, Soria J. Measurements of near wall velocity and wall stress in awall-bounded turbulent flow using digital holographic microscopic PIV and shear stress sensitive film. In Stanislas M, Jimenez J, Marusic I, editors, Progress in Wall Turbulence: Understanding and Modeling - Proceedings of the WALLTURB International Workshop, 2009. Springer Netherland. 2011. p. 385-392. (ERCOFTAC Series). doi: 10.1007/978-90-481-9603-6_40

Amili, Omid ; Soria, Julio. / Measurements of near wall velocity and wall stress in awall-bounded turbulent flow using digital holographic microscopic PIV and shear stress sensitive film. Progress in Wall Turbulence: Understanding and Modeling - Proceedings of the WALLTURB International Workshop, 2009. editor / Michel Stanislas ; Javier Jimenez ; Ivan Marusic. Springer Netherland, 2011. pp. 385-392 (ERCOFTAC Series).

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AB - In wall-bounded turbulent flows, a large portion of total turbulence production happens in the near wall region. Although the viscous and buffer layers are relatively easy for numerical simulations due to local low Reynolds numbers of the important structures, they are very difficult to study experimentally because of their physically small geometry. The aim of this paper is to measure the wall shear stress in a fully developed turbulent channel flow at moderately high Reynolds numbers using a novel stress meter which is capable of measuring surface forces over an extended region of the model. In addition, near wall region in a wall-bounded flow by means of digital holographic microscopic particle image velocimetry will be investigated. DHMPIV provides a solution to overcome the poor axial accuracy and the low spatial resolution. The paper addresses the experimental techniques, articulate calibration procedure, data acquisition, and analysis procedure.

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Measurements of near wall velocity and wall stress in awall-bounded turbulent flow using digital holographic microscopic PIV and shear stress sensitive film

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