An Experimental Study of Turbulent Flow in the Vicinity of Transverse Square Bars

Dubravka Pokrajac

doi:10.1007/978-90-481-9631-9_3

An Experimental Study of Turbulent Flow in the Vicinity of Transverse Square Bars

Dubravka Pokrajac

Engineering

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

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Abstract

This paper presents results from an experimental investigation of rough turbulent open channel flow over transverse square bars. Bar spacing was systematically varied between 2 and 20 bar heights. Velocities were measured by means of Particle Image Velocimetry (PIV), which captured details of flow fields above and between the bars. The streamlines calculated from the time-averaged flow velocities show the shape of persistent vortices in the gap between the bars. Further analysis is based on Double-Averaged Navier-Stokes equations (DANS). Momentum exchange between the flows above and within the gaps is explored using spatial quadrant analysis and the decomposition of the spatially averaged turbulent stress.

Original language	English
Title of host publication	IUTAM Symposium on The Physics of Wall-Bounded Turbulent Flows on Rough Walls
Subtitle of host publication	Proceedings of the IUTAM Symposium on The Physics of Wall-Bounded Turbulent Flows on Rough Walls, held Cambridge, UK, July 7-9, 2009
Editors	T. B. Nickels
Publisher	Springer Netherlands
Pages	21-26
Number of pages	6
Volume	22
ISBN (Electronic)	9789048196319
ISBN (Print)	9789048196302
DOIs	https://doi.org/10.1007/978-90-481-9631-9_3
Publication status	Published - 2010

Publication series

Name	IUTAM Bookseries
Publisher	Springer Netherlands
ISSN (Print)	1875-3507
ISSN (Electronic)	1875-3493

Keywords

boundary layer
rough wall
turbulence

Access to Document

10.1007/978-90-481-9631-9_3

Pokrajac IUTAM 2010
The final publication is available at www.springerlink.com - http://www.springerlink.com/content/lg81637467510653/
Submitted manuscript, 1.67 MB

Cite this

Pokrajac, D. (2010). An Experimental Study of Turbulent Flow in the Vicinity of Transverse Square Bars. In T. B. Nickels (Ed.), IUTAM Symposium on The Physics of Wall-Bounded Turbulent Flows on Rough Walls: Proceedings of the IUTAM Symposium on The Physics of Wall-Bounded Turbulent Flows on Rough Walls, held Cambridge, UK, July 7-9, 2009 (Vol. 22, pp. 21-26). (IUTAM Bookseries). Springer Netherlands. https://doi.org/10.1007/978-90-481-9631-9_3

An Experimental Study of Turbulent Flow in the Vicinity of Transverse Square Bars. / Pokrajac, Dubravka.

IUTAM Symposium on The Physics of Wall-Bounded Turbulent Flows on Rough Walls: Proceedings of the IUTAM Symposium on The Physics of Wall-Bounded Turbulent Flows on Rough Walls, held Cambridge, UK, July 7-9, 2009. ed. / T. B. Nickels. Vol. 22 Springer Netherlands, 2010. p. 21-26 (IUTAM Bookseries).

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

Pokrajac, D 2010, An Experimental Study of Turbulent Flow in the Vicinity of Transverse Square Bars. in TB Nickels (ed.), IUTAM Symposium on The Physics of Wall-Bounded Turbulent Flows on Rough Walls: Proceedings of the IUTAM Symposium on The Physics of Wall-Bounded Turbulent Flows on Rough Walls, held Cambridge, UK, July 7-9, 2009. vol. 22, IUTAM Bookseries, Springer Netherlands, pp. 21-26. https://doi.org/10.1007/978-90-481-9631-9_3

Pokrajac D. An Experimental Study of Turbulent Flow in the Vicinity of Transverse Square Bars. In Nickels TB, editor, IUTAM Symposium on The Physics of Wall-Bounded Turbulent Flows on Rough Walls: Proceedings of the IUTAM Symposium on The Physics of Wall-Bounded Turbulent Flows on Rough Walls, held Cambridge, UK, July 7-9, 2009. Vol. 22. Springer Netherlands. 2010. p. 21-26. (IUTAM Bookseries). doi: 10.1007/978-90-481-9631-9_3

Pokrajac, Dubravka. / An Experimental Study of Turbulent Flow in the Vicinity of Transverse Square Bars. IUTAM Symposium on The Physics of Wall-Bounded Turbulent Flows on Rough Walls: Proceedings of the IUTAM Symposium on The Physics of Wall-Bounded Turbulent Flows on Rough Walls, held Cambridge, UK, July 7-9, 2009. editor / T. B. Nickels. Vol. 22 Springer Netherlands, 2010. pp. 21-26 (IUTAM Bookseries).

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An Experimental Study of Turbulent Flow in the Vicinity of Transverse Square Bars

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