Volume 5, Issue 6, December 2016, Page: 93-103
Vertical Water Velocity Distribution Using Fine Different Sediment Concentrations in Circular Open Channel
Mohamed Gamal Mohamed Abdalla, Irrigation and Hydraulics Dept., Faculty of Engineering, Mansoura University, Mansoura, Egypt
Received: Oct. 22, 2016;       Accepted: Nov. 1, 2016;       Published: Dec. 16, 2016
DOI: 10.11648/j.wros.20160506.13      View  3756      Downloads  119
The effect of fine different sediment concentrations on velocity distribution in open circular pipe was experimentally studied. An "ADV"(Acoustic Doppler Velocimeter) instrument was used for measuring the velocity distribution at the centerline of channel. Three different sediment concentrations of 1000 gm, 1500 gm and 2000 gm were added to the input upstream tank of the used channel with dimensions of 67.5 cm × 154 cm × 25 cm (0.26 m3). To find out separately the final concentrations of suspended load and bed load, a trap was designed at the end of the channel. Three water depths were used 11 cm, 13 cm and 15 cm to give depth-diameter ratios of 0.55, 0.65 and 0.75. A maximum discharge of 1.50 lit. /sec was used. From this experimental research the time of each run that used to separate between bed and suspended loads was three hours. After that, (after three hours from starting run), the "ADV" instrument was used to measure the distribution of water velocity. The run was repeated for all total load sediment concentrations and for the three depth-diameter ratios mentioned before to separate the bed load and suspended load. From the analysis, it was concluded that with the increasing of suspended load, the water velocity decreases obviously. The increasing of water depth causes the increase of bed load and the decrease in suspended load concentrations. Different polynomial equations were deduced, at the centerline only, to study the effect of run time and water depth-diameter ratio on bed load quantity by weight.
Bed Load, Suspended Load, Circular Channel, ADV Instrument, Velocity Distribution
To cite this article
Mohamed Gamal Mohamed Abdalla, Vertical Water Velocity Distribution Using Fine Different Sediment Concentrations in Circular Open Channel, Journal of Water Resources and Ocean Science. Vol. 5, No. 6, 2016, pp. 93-103. doi: 10.11648/j.wros.20160506.13
Copyright © 2016 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Al-Khafif S. "Study of open channels degradation and corresponding bed roughness", Ph.D. thesis, University of California, 1965.
Coles D. "The law of wake in the turbulent boundary layer", Journal of Fluid Mech., Vol.1, pp. 191–226, 1956.
Coleman N. "Velocity profiles with suspended sediment", Journal of Hydraulics Research, Vol. 19 (3), pp. 211–229, 1981.
Einstein H. and Chien N. "Effects of heavy sediment concentration near the bed on the velocity and sediment distribution", Report. No. 8, University of California, Berkeley, CA, 1955.
Grant, J., Walker, T. R., Hill P. S., Lintern, D. G. "BEAST-A portable device for quantification of erosion in intact sediment cores", Methods in Oceanography. DOI: 10.1016/j.mio.2013.03.001, 2013.
Itakura T. and Kishi T. "Open channel flow with suspended sediments", Journal of Hydraulics Division, ASCE, Vol. 106 (8), pp. 1325–1343, 1980.
Lavelle J. and Thacker W. "Effects of hindered settling on sediment concentration profiles", Journal of Hydraulics Research, IAHR, Vol. 16 (4), pp. 347–355, 1978.
Mazumder B. and Ghoshal K. "Velocity and concentration profiles in uniform sediment-laden flow", Applied Mathematical Modeling, Vol. 30 (2), pp. 164–176, 2006.
Milad K., Kyle S. and Qin Q. "A Literature Review on the Sediment Transport Process in Shallow-Grade Culverts and Storm Sewers", Proceedings of the ASEE Gulf-Southwest Annual Conference Organized by The University of Texas at San Antonio, 2015.
Newton C. "An experimental investigation of bed degradation in an open channel", Transcript, Boston Society of Civil Engineers, pp. 28-60, 1951.
Nezu I. and Rodi W. "Open-channel flow measurements with a Laser Doppler Anemometer", Journal of Hydraulics Engineering, ASCE, Vol. 112, pp. 335–355, 1986.
Nezu I. and Nakagawa H. "Turbulence in open-channel flows", IAHR Monograph A. A. Balkema Publishers, Rotterdam, 1993.
Pellachini I. "Modeling fine sediment transport over an immobile gravel bed", Trento: Unitn - eprints. 2011.
Schlichting H. and Gersten K. "Boundary layer theory", (8th ed.) Springer, 2000.
Suryanarayana B. and Shen W. "Laboratory study of degradation and aggradation", Journal of Waterways, Harbors and Coastal Engineering Division, Vol. 97, pp.615-630, 1971.
Woo H., Julien P. and Richardson E. "Suspension of large concentration of sands", Journal of Hydraulics Engineering, ASCE, Vol. 114, pp. 888–898, 1988.
Vanoni V. "Transportation of suspended sediment by water", Trans. ASCE, Vol. 111, pp. 67–133, 1946.
Browse journals by subject