Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników
2018 | 27 | 3 |

Tytuł artykułu

Turbulence characteristics of flow field around a cylindrical obstacle placed in a trapezoidal channel


Warianty tytułu

Języki publikacji



This paper describes measurements of the turbulence surrounding a vertical cylinder in a steady flow. The approximate size of circulations and eddies produced by a cylindrical obstacle subject to steady flow in a trapezoidal channel are investigated. A four-component high-sampling frequency acoustic doppler velocimeter (ADV) was used to collect flow data, which were filtered using effective filtering algorithms before being processed. Because the turbulence is three dimensional, calculations were performed for all three directions. The energy distribution and dependence of the fluctuating velocities were determined and interpreted using an autocorrelation function and spectral analysis. Important turbulence statistics were calculated, including Reynolds stresses, integral time scales, and integral length scales. For representative points, the approximate size of the turbulent eddy was calculated. A spectral density function was generated and analyzed. The results show that highly coherent and dependent structures are visible in the wake vortices region for each axis..

Słowa kluczowe








Opis fizyczny



  • Department of Civil Engineering, Aksaray University, 68100 Aksaray Turkey


  • 1. FRANCA M.J., BROCCHINI M. Turbulence in rivers, in Rivers-Physical, Fluvial and Environmental Processes., Springer. 51, 2015.
  • 2. DAVIDSON P. Turbulence: an introduction for scientists and engineers.: Oxford University Press, 2015.
  • 3. BENNET S., GHANEEIZAD S.M., GALLISDORFER M.S., LANGENDOEN E.J. Flow, turbulence, and drag associated with engineered log jams in a fixed-bed experimental channel. Geomorphology, 248, 172, 2015.
  • 4. MARUSIC I., MONTY J.P., HULTMARK M., SMITS A.J. On the logarithmic region in wall turbulence. Journal of Fluid Mechanics 716, R3, 2013.
  • 5. BRADSHAW P., An introduction to turbulence and its measurement: thermodynamics and fluid mechanics series.: Elsevier, 2013.
  • 6. CONSTANTINESCU G., KOKEN M., ZENG J., The structure of turbulent flow in an open channel bend of strong curvature with deformed bed: Insight provided by detached eddy simulation. Water Resources Research. 47 (5), 2011.
  • 7. BAYKAL C., SUMER B.M., FUHRMAN D.R., JACOBSEN N.G., FREDSOE J. Numerical investigation of flow and scour around a vertical circular cylinder. Philosophical Transactions of the Royal Society of London A: Mathematical, Physical and Engineering Sciences, 373 (2033), 20140104, 2015.
  • 8. CHANG, P.K., Separation of flow.: Elsevier, 2014.
  • 9. WANG X.Y., YANG G.Y., LU W.Z., WANG X.K. Experimental study of near-wall turbulent characteristics in an open-channel with gravel bed using an acoustic Doppler velocimeter. Experiments in fluids 52 (1), 85, 2012.
  • 10. BEHESHTI A., ATAIE-ASHTIANI B., Scour hole influence on turbulent flow field around complex bridge piers. Flow, Turbulence and Combustion,. 97 (2), 451, 2016.
  • 11. BAKI A.B.M. Flow Structures in the Vicinity of a Submerged Boulder within a Boulder Array. Journal of Hydraulic Engineering, 04016104, 2016.
  • 12. YILMAZ M., YANMAZ M., KOKEN M. Clear-water scour evolution at dual bridge piers. Canadian Journal of Civil Engineering, (ja), 2017.
  • 13. DOGAN A., Flow around bridge piers in Civil Engineering. Middle East Technical University: Ankara, 1993.
  • 14. MADDOCK, I., HARBY, A. KEMP, P,WOOD, Ecohydraulics: an integrated approach John Wiley & Sons 2013.
  • 15. TERMINI D. Experimental Analysis of Horizontal Turbulence of Flow over Flat and Deformed Beds. Archives of Hydro-Engineering and Environmental Mechanics. 62 (3-4), 77, 2015.
  • 16. TIWARI H., SHARMA N. Turbulent kinetic energy in the upstream of Piano Key Weir. Arabian Journal for Science and Engineering. 41 (10), 4147, 2016.
  • 17. GORING D.G., NIKORA V.I. Despiking acoustic Doppler velocimeter data. Journal of Hydraulic Engineering,. 128 (1), 117, 2002.
  • 18. STOER J., BULIRSCH R. Introduction to numerical analysis. Vol. 12.: Springer Science & Business Media, 2013.
  • 19. MONIN A.S., YAGLOM A.M. Statistical fluid mechanics, volume II: Mechanics of turbulence. Vol. 2.: Courier Corporation, 2013.
  • 20. YALIN M.S. Mechanics of Sediment Transport. Pergamon. and early results. Sediment. Geol. 15, 1, 1972.
  • 21. HINZE J. Turbulence McGraw-Hill. New York, 218 1975.
  • 22. KUCUKALI S., HASSINGER R. Flow and turbulence structure in a baffle–brush fish pass. in Proceedings of the Institution of Civil Engineers-Water Management. Published online October 31, 2016.
  • 23. NIKORA V., GORING D. Flow turbulence over fixed and weakly mobile gravel beds. Journal of Hydraulic Engineering. 126 (9), 679, 2000.

Typ dokumentu



Identyfikator YADDA

JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.