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Research Papers: Fundamental Issues and Canonical Flows

An Experimental Investigation of Turbulent Water Flow in Concentric Annulus Using Particle Image Velocimetry Technique

[+] Author and Article Information
F. E. Rodriguez-Corredor

University of Alberta,
School of Mining and Petroleum Engineering,
Edmonton, AB T6G 2W2, Canada
e-mail: fabioern@ualberta.ca

Majid Bizhani

University of Alberta,
School of Mining and Petroleum Engineering,
Edmonton, AB T6G 2W2, Canada
e-mail: Bizhani@ualberta.ca

Mohammad Ashrafuzzaman

University of Alberta,
School of Mining and Petroleum Engineering,
Edmonton, AB T6G 2W2, Canada
e-mail: mashrafu@ualberta.ca

Ergun Kuru

University of Alberta,
School of Mining and Petroleum Engineering,
Edmonton, AB T6G 2W2, Canada
e-mail: ekuru@ualberta.ca

Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received October 28, 2013; final manuscript received November 27, 2013; published online March 10, 2014. Assoc. Editor: Peter Vorobieff.

J. Fluids Eng 136(5), 051203 (Mar 10, 2014) (11 pages) Paper No: FE-13-1642; doi: 10.1115/1.4026136 History: Received October 28, 2013; Revised November 27, 2013

Fully developed turbulent flow of water through a horizontal flow loop with concentric annular geometry was investigated using high resolution particle image velocimetry (PIV). Reynolds number range varied from 17,700 to 66,900. Axial mean velocity profile was found to be following the universal wall law (u+= y+) in the viscous sublayer (y+ < 10) and log law away from the wall (y+> 30). Radial position of zero shear stress and maximum velocity were found to be slightly different (2%). Root mean square values of velocity fluctuations velocity, Reynolds stresses, vorticity, and turbulent kinetic energy budget were also analyzed.

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References

Figures

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Fig. 1

Schematic of the flow loop and associated equipment used for the experimental program

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Fig. 2

Test section of the flow-loop with the PIV system [22]

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Fig. 3

Axial mean velocity profile in wall coordinates close to the inner wall

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Fig. 4

Axial mean velocity profile in wall coordinates close to the outer wall

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Fig. 5

Axial mean velocity profile in the whole annular section (Re = 17,700–38,700)

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Fig. 6

Axial mean velocity profile in the whole annular section (Re = 46,700–67,700)

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Fig. 7

Total shear stress profile in the whole annular section (Re = 17,700–38,700)

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Fig. 8

Total shear stress profile in the whole annular section (Re = 46,700–67,700)

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Fig. 9

Comparison of radial locations of maximum velocity and zero shear stress

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Fig. 10

Root mean square of the axial fluctuation velocities (Re = 38,700)

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Fig. 11

Root mean square of the radial fluctuation velocities (Re = 38,700)

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Fig. 12

Reynolds stress close to the inner and outer wall (Re = 38,700)

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Fig. 13

Total stress close to the inner and outer wall (Re = 38,700)

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Fig. 14

Shear production term (Pk+) near the inner and the outer wall (Re = 38,700)

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Fig. 15

Viscous dissipation term (VD+) near the inner and the outer wall (Re = 38,700)

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Fig. 16

2D vorticity values near the inner and outer wall (Re = 38,700)

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Fig. 17

Rms of vorticity fluctuations close to the inner and outer wall (Re = 38,700)

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Fig. 18

Velocity profile and 95% interval of confidence

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Fig. 19

Velocity gradient and 95% interval of confidence

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Fig. 20

(–u'v’) profile and 95% interval of confidence

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Fig. 21

rms of fluctuation velocity in the x (u) direction profile and 95% interval of confidence

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Fig. 22

Rms of fluctuation velocity in the y (v) direction profile and 95% interval of confidence

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Fig. 23

Effect of PIV interrogation window size on the velocity profile

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Fig. 24

Effect of PIV interrogation window size on the –u'v’ distribution

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