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Use of hot-filmanemometry for wall shear stress measurements in unsteady flows

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Use of hot-filmanemometry for wall shear stress measurements in unsteady flows. / Ariyaratne, Chanchala; Wang, Feng; He, Shuisheng; Vardy, Alan E.

14th International Heat Transfer Conference, IHTC14. American Society of Mechanical Engineers, 2010. p. 31-39.

Research output: Chapter in Book/Report/Conference proceedingOther chapter contribution

Harvard

Ariyaratne, C, Wang, F, He, S & Vardy, AE 2010, 'Use of hot-filmanemometry for wall shear stress measurements in unsteady flows'. in 14th International Heat Transfer Conference, IHTC14. American Society of Mechanical Engineers, pp. 31-39, 14th International Heat Transfer Conference, Washington, United States, 7-13 August.

APA

Ariyaratne, C., Wang, F., He, S., & Vardy, A. E. (2010). Use of hot-filmanemometry for wall shear stress measurements in unsteady flows. In 14th International Heat Transfer Conference, IHTC14. (pp. 31-39). American Society of Mechanical Engineers.

Vancouver

Ariyaratne C, Wang F, He S, Vardy AE. Use of hot-filmanemometry for wall shear stress measurements in unsteady flows. In 14th International Heat Transfer Conference, IHTC14. American Society of Mechanical Engineers. 2010. p. 31-39.

Author

Ariyaratne, Chanchala; Wang, Feng; He, Shuisheng; Vardy, Alan E. / Use of hot-filmanemometry for wall shear stress measurements in unsteady flows.

14th International Heat Transfer Conference, IHTC14. American Society of Mechanical Engineers, 2010. p. 31-39.

Research output: Chapter in Book/Report/Conference proceedingOther chapter contribution

Bibtex - Download

@inbook{7ba1395ff91c40258008ce65cc044f62,
title = "Use of hot-filmanemometry for wall shear stress measurements in unsteady flows",
publisher = "American Society of Mechanical Engineers",
author = "Chanchala Ariyaratne and Feng Wang and Shuisheng He and Vardy, {Alan E.}",
year = "2010",
isbn = "978-079184939-2",
pages = "31-39",
booktitle = "14th International Heat Transfer Conference, IHTC14",

}

RIS (suitable for import to EndNote) - Download

TY - CHAP

T1 - Use of hot-filmanemometry for wall shear stress measurements in unsteady flows

A1 - Ariyaratne,Chanchala

A1 - Wang,Feng

A1 - He,Shuisheng

A1 - Vardy,Alan E.

AU - Ariyaratne,Chanchala

AU - Wang,Feng

AU - He,Shuisheng

AU - Vardy,Alan E.

PB - American Society of Mechanical Engineers

PY - 2010

Y1 - 2010

N2 - Hot-wire and hot-film anemometry are widely used in steady flows for instantaneous velocity measurements, and their use has been extended to velocity and wall shear stress measurements in unsteady flows. The technique of hot-film anemometry relies on the Reynolds analogy which relates the diffusion of heat to the momentum exchange. The paper investigates the applicability of the analogy in linearly varying flows. The investigation is a combination of CFD analyses using the Transition SST model and experimental measurements. Results show that, in a linearly accelerating flow, while wall shear stress increases immediately upon the onset of acceleration, heat transfer indicates a relative lag in response. A quantitative analysis of the effects of flow parameters shows that the deviant behaviour is especially pronounced with increasing acceleration and/or reduced initial flow Reynolds number. The initial deviation can be predicted using a non-dimensional parameter based on turbulence timescales and acceleration rate, thereby providing a possible solution to correcting wall shear stress measurements using hot-film anemometry in fast accelerating flows. © 2010 by ASME.

AB - Hot-wire and hot-film anemometry are widely used in steady flows for instantaneous velocity measurements, and their use has been extended to velocity and wall shear stress measurements in unsteady flows. The technique of hot-film anemometry relies on the Reynolds analogy which relates the diffusion of heat to the momentum exchange. The paper investigates the applicability of the analogy in linearly varying flows. The investigation is a combination of CFD analyses using the Transition SST model and experimental measurements. Results show that, in a linearly accelerating flow, while wall shear stress increases immediately upon the onset of acceleration, heat transfer indicates a relative lag in response. A quantitative analysis of the effects of flow parameters shows that the deviant behaviour is especially pronounced with increasing acceleration and/or reduced initial flow Reynolds number. The initial deviation can be predicted using a non-dimensional parameter based on turbulence timescales and acceleration rate, thereby providing a possible solution to correcting wall shear stress measurements using hot-film anemometry in fast accelerating flows. © 2010 by ASME.

UR - http://www.scopus.com/inward/record.url?partnerID=yv4JPVwI&eid=2-s2.0-84860499046&md5=83676696cc3350a291fd802732b359d2

UR - http://www.asmeconferences.org/IHTC14/index.cfm

M1 - Other chapter contribution

SN - 978-079184939-2

BT - 14th International Heat Transfer Conference, IHTC14

T2 - 14th International Heat Transfer Conference, IHTC14

SP - 31

EP - 39

ER -

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