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Journal of Hydrology and Hydromechanics

The Journal of Institute of Hydrology SAS Bratislava and Institute of Hydrodynamics CAS Prague

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IMPACT FACTOR 2016: 1.654

CiteScore 2016: 1.72

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Volume 64, Issue 3


Measurement of turbulent flow in a narrow open channel

Sankar Sarkar
Published Online: 2016-07-08 | DOI: https://doi.org/10.1515/johh-2016-0018


The paper presents the experimental results of turbulent flow over hydraulically smooth and rough beds. Experiments were conducted in a rectangular flume under the aspect ratio b/h = 2 (b = width of the channel 0.5 m, and h = flow depth 0.25 m) for both the bed conditions. For the hydraulically rough bed, the roughness was created by using 3/8″ commercially available angular crushed stone chips; whereas sand of a median diameter d50 = 1.9 mm was used as the bed material for hydraulically smooth bed. The three-dimensional velocity components were captured by using a Vectrino (an acoustic Doppler velocimeter). The study focuses mainly on the turbulent characteristics within the dip that were observed towards the sidewall (corner) of the channel where the maximum velocity occurs below the free-surface. It was also observed that the nondimensional Reynolds shear stress changes its sign from positive to negative within the dip. The quadrant plots for the turbulent bursting shows that the signs of all the bursting events change within the dip. Below the dip, the probability of the occurrence of sweeps and ejections are more than that of inward and outward interactions. On the other hand, within the dip, the probability of the occurrence of the outward and inward interactions is more than that of sweeps and ejections.

Keywords: Flow measurement; Turbulent flow; Dip-phenomenon; Turbulent bursting; Open channel flow


  • Absi, R., 2011. An ordinary differential equation for velocity distribution and dip-phenomenon in open channel flows. J. Hydraul. Res., 49, 1, 82-89.CrossrefWeb of ScienceGoogle Scholar

  • Auel, C., Albayrak, I., Boes, R., 2014. Turbulence characteristics in supercritical open channel flows: effects of Froude number and aspect ratio. J. Hydraul. Eng., 140, 4, 04014004.Google Scholar

  • Cea, L, Puertas, J., Pena, L., 2007. Velocity measurements on highly turbulent free surface flow using ADV. Exp. Fluids, 42, 3, 333-348.Google Scholar

  • Chow, V.T., 1959. Open Channel Hydraulics. McGraw-Hill Book Company, New York.Google Scholar

  • Corino, E.R., Brodkey, R.S., 1969. A visual investigation of the wall region in turbulent flow. J. Fluid Mech., 37, 1, 1-30.Google Scholar

  • Dey, S., 2014. Fluvial Hydrodynamics: Hydrodynamic and Sediment Transport Phenomena. Springer-Verlag, Berlin, Heidelberg.Web of ScienceGoogle Scholar

  • Dey, S., Nath, T.K., 2010. Turbulence characteristics in flows subjected to boundary injection and suction. J. Eng. Mech., ASCE, 136, 7, 877-888.Web of ScienceGoogle Scholar

  • Dey, S., Das, R., 2012. Gravel-bed hydrodynamics: Doubleaveraging approach. J. Hydraul. Eng., 138, 8, 707-725.Google Scholar

  • Franca, M.J., Lemmin, U., 2009. The simultaneous occurrence of logarithmic and S-shaped velocity profiles in gravel-bed river flows. Arch. Hydro-Eng. and Environ. Mech., 56, 1-2, 29-41.Google Scholar

  • Grass, A.J., 1971. Structural features of turbulent flow over smooth and rough boundaries. J. Fluid Mech., 50, 2, 233-255.CrossrefGoogle Scholar

  • Goring, D., Nikora, V.I., 2002. Despiking acoustic Doppler velocimeter data. J. Hydraul. Eng., 128, 1, 117-126.Google Scholar

  • Guo, J., Julien, P.Y., 2008. Application of the modified logwake law in open-channels. J. Appl. Fluid Mech., 1, 2, 17-23.Google Scholar

  • Kline, S.J., Reynolds, W.C., Schraub, F.A., Runstadler, P.W., 1967. The structure of turbulent boundary layers. J. Fluid Mech., 30, 741-773.Google Scholar

  • MacVicar, B.J., Dilling, S., Lacey, R.W.J., Hipel, K., 2014. A quality analysis of the Vectrino II instrument using a new open-source MATLAB toolbox and 2D ARMA models to detect and replace spikes. In: Proc. Conf. River Flow 2014, Lausanne, Switzerland.Google Scholar

  • Mignot, E., Barthelemy, E., Hurther, D., 2009. Doubleaveraging analysis and local flow characterization of nearbed turbulence in gravel-bed channel flows. J. Fluid Mech., 618, 279-303.Web of ScienceGoogle Scholar

  • Najafabadi, E.F., Afzalimehr, H., Sui, J., 2015. Turbulence characteristics of favorable pressure gradient flows in gravel-bed channel with vegetated walls. J. Hydrol. Hydromech., 63, 2, 154-163.Web of ScienceGoogle Scholar

  • Nezu, I., Nakagawa, H., 1993. Turbulence in Open-Channel Flows. Balkema, Rotterdam.Google Scholar

  • Parsheh, M., Sotiropoulos, F., Port ́e-Agel, F., 2010. Estimation of power spectra of acoustic-Doppler velocimetry data contaminated with intermittent spikes. J. Hydraul. Eng., 136, 6, 368-378.Web of ScienceGoogle Scholar

  • Rodríguez, J.F., García, M.H., 2008. Laboratory measurements of 3-D flow patterns and turbulence in straight open channel with rough bed. J. Hydraul. Res., 46, 454-465.Google Scholar

  • Sarma, K.V.N., Prasad, B.V.R., Sarma, A.K., 2000. Detailed study of binary law for open channels. J. Hydraul. Eng., 126, 3, 210-214.Google Scholar

  • Tracy, H.J., Lester, C.M., 1961. Resistance coefficients and velocity distribution in smooth rectangular channel. U.S. Geological Survey (USGS) Water-supply paper 1592-A, USGS, Washington, D.C., A1-A18.Google Scholar

  • Vanoni, V.A., 1941. Velocity distribution in open channels. Civil Eng., 11, 6, 356-357.Google Scholar

  • Willmarth, W.W., Lu, S.S., 1972. Structure of the Reynolds stress near the wall. J. Fluid Mech., 55, 65-92.Google Scholar

  • Wright, J.D., Baas, J.H., 2013. Despiking ultrasonic Doppler velocity-profiling data. J. Sedimentary Res. (Research Methods), 83, 11, 954-961.Google Scholar

  • Yang, S.Q., Tan, S.K., Lim, S.Y., 2004. Velocity distribution and dip-phenomenon in smooth uniform open channel flows. J. Hydraul. Eng., 130, 12, 1179-1186.Google Scholar

About the article

Received: 2015-10-09

Accepted: 2016-02-12

Published Online: 2016-07-08

Published in Print: 2016-09-01

Citation Information: Journal of Hydrology and Hydromechanics, Volume 64, Issue 3, Pages 273–280, ISSN (Online) 0042-790X, DOI: https://doi.org/10.1515/johh-2016-0018.

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© 2016. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License. BY-NC-ND 4.0

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