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Flow turbulence presented by different vegetation spacing sizes within a submerged vegetation patch

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Abstract

This study presents results from a vegetation-induced flow experimental study which investigates 3-D turbulence structure profiles, including Reynolds stress, turbulence intensity and bursting analysis of open channel flow. Different vegetation densities have been built between the adjacent vegetations, and the flow measurements are taken using acoustic Doppler velocimeter (ADV) at the locations within and downstream of the vegetation panel. Three different tests are conducted, where the first test has compact vegetations, while the second and the third tests have open spaces created by one and two empty vegetation slots within the vegetated field. Observation reveals that over 10% of eddies size is generated within the vegetated zone of compact vegetations as compared with the fewer vegetations. Significant turbulence structures variation is also observed at the points in the non-vegetated row. The findings from burst-cycle analysis show that the sweep and outward interaction events are dominant, where they further increase away from the bed. The effect of vegetation on the turbulent burst cycle is mostly obvious up to approximately two-third of vegetation height where this phenomenon is also observed for most other turbulent structure.

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References

  1. Dey S., Swargiary D., Sarkar S. Self-similarity in turbulent wall-wake flow downstream of a wall-mounted vertical cylinder [J]. Journal of Hydraulic Engineering, ASCE, 2018, 144(6): 04018023.

    Article  Google Scholar 

  2. Bento A. M., Viseu T., Pêgo J. P. et al. Experimental characterization of the flow field around oblong bridge piers [J]. Fluids, 2021, 6(11): 370.

    Article  ADS  Google Scholar 

  3. Huai W. X., Zhang J., Katul G. G. et al. The structure of turbulent flow through submerged flexible vegetation [J]. Journal of Hydrodynamics, 2019, 31(2): 274–292.

    Article  ADS  Google Scholar 

  4. Pu J. H., Hussain A., Guo Y. et al. Submerged flexible vegetation impact on open channel flow velocity distribution: An analytical modelling study on drag and friction [J]. Water Science and Engineering, 2019, 12(2): 121–128.

    Article  Google Scholar 

  5. Sarkar S., Dey S. Self preserving characteristics in wall wake flow downstream of an isolated bedform [J]. Environmental Fluid Mechanics, 2020, 20: 1119–1139.

    Article  ADS  Google Scholar 

  6. Vijayasree B. A., Eldho T. I., Mazumder B. S. Turbulence statistics of flow causing scour around circular and oblong piers [J]. Journal of Hydraulic Research, 2020, 58(4): 673–686.

    Article  Google Scholar 

  7. Pu J. H. Editorial: Environmental hydraulics, turbulence and sediment transpor [J]. Fluids, 2022, 7(2): 48.

    Article  ADS  Google Scholar 

  8. Huai W. X., Zeng Y. H., Xu Z. G. et al. Three-layer model for vertical velocity distribution in open channel flow with submerged rigid vegetation [J]. Advances in Water Resources, 2009, 32(4): 487–492.

    Article  ADS  Google Scholar 

  9. Lozanovska I., Bejarano M., Martins M. et al. Functional diversity of riparian woody vegetation is less affected by river regulation in the mediterranean than boreal region [J]. Frontiers in Plant Science, 2020, 11: 857.

    Article  PubMed  PubMed Central  Google Scholar 

  10. Wang S., Zhou Y., Li T. et al. Study on flow velocity distribution in open channel with flexible vegetation [J]. Frontiers in Plant Science, 2021, 12: 753613.

    Article  PubMed  PubMed Central  Google Scholar 

  11. Kazem M., Afzalimehr H., Sui J. Characteristics of turbulence in the downstream region of a vegetation patch [J]. Water, 2021, 13(23): 3468.

    Article  Google Scholar 

  12. Zeng C., Li C. Measurements and modelling of open-channel flows with finite semi-rigid vegetation patches [J]. Environmental Fluid Mechanics, 2014, 14: 113–134.

    Article  ADS  Google Scholar 

  13. Rivaes R., Pinheiro A., Egger G. et al. The Role of river Morphodynamic disturbance and groundwater hydrology as driving factors of riparian landscape patterns in Mediterranean Rivers [J]. Frontiers in Plant Science, 2017, 8: 1612.

    Article  PubMed  PubMed Central  Google Scholar 

  14. Pu J. H., Tait S., Guo Y. et al. Dominant features in three-dimensional turbulence structure: comparison of non-uniform accelerating and decelerating flows [J]. Environmental Fluid Mechanics, 2018, 18: 395–416.

    Article  ADS  CAS  Google Scholar 

  15. Li W. Q., Wang D., Jiao J. L. et al. Effects of vegetation patch density on flow velocity characteristics in an open channel [J]. Journal of Hydrodynamics, 2019, 31(6): 1052–1059.

    Article  ADS  Google Scholar 

  16. Huai W. X., Li S., Katul H. G. et al. Flow dynamics and sediment transport in vegetated rivers: A review [J]. Journal of Hydrodynamics 2021, 33(3): 400–420.

    Article  ADS  Google Scholar 

  17. Liu M., Huai W., Ji B. Characteristics of the flow structures through and around a submerged canopy patch [J]. Physics of Fluids, 2021, 33(3): 035144.

    Article  ADS  CAS  Google Scholar 

  18. Liu M., Huai W., Ji B. et al. Numerical study on the drag characteristics of rigid submerged vegetation patches [J]. Physics of Fluids, 2021, 33(8): 085123.

    Article  ADS  CAS  Google Scholar 

  19. Nepf H., Ghisalberti M. Flow and transport in channels with submerged vegetation [J]. Acta Geophysica, 2008, 56(3): 753.

    Article  ADS  Google Scholar 

  20. Wilson C. A. M. E., Stoesser T., Bates P. D. et al. Open channel flow through different forms of submerged flexible vegetation [J]. Journal of Hydraulic Engineering, ASCE, 2003, 129(11): 847–853.

    Article  Google Scholar 

  21. Wang J., He G., Dey S. et al. Influence of submerged flexible vegetation on turbulence in an open-channel flow [J]. Journal of Fluid Mechanics, 2022, 947: A31.

  22. Pu J. H. Velocity Profile and turbulence structure measurement corrections for sediment transport-induced water-worked bed [J]. Fluids, 2021, 6(2): 86.

    Article  ADS  CAS  Google Scholar 

  23. Nezu I., Nakagawa H. Turbulent open-channel flows [M]. Rotterdam, The Netherlands: A. A. Balkema, 1993.

    Google Scholar 

  24. Auel C., Albayrak I., Boes R. M. Turbulence characteristics in supercritical open channel flows: Effects of Froude number and aspect ratio [J]. Journal of Hydraulic Engineering, ASCE, 2014, 140(4): 04014004.

    Article  Google Scholar 

  25. Coles D. The law of the wake in the turbulent boundary layer [J]. Journal of Fluid Mechanics 1956, 1(2): 191–226.

    Article  ADS  MathSciNet  Google Scholar 

  26. Cardoso A. H., Graf W. H., Gust G. Uniform flow in a smooth open channel [J]. Journal of Hydraulic Research 1989, 27(5): 603–616.

    Article  Google Scholar 

  27. Cardoso A. H., Graf W. H., Gust G. Steady gradually accelerating flow in a smooth open channel [J]. Journal of Hydraulic Research, 1991, 29(4): 525–543.

    Article  Google Scholar 

  28. Kironoto B. A., Graf W. H. Turbulence characteristics in rough uniform open-channel flow [J]. Proceedings of the ICE-Water Maritime and Energy, 1994, 106(12): 333–344.

    Article  Google Scholar 

  29. Song T. Velocity and turbulence distribution in nonuniform and unsteady open-channel flow [J]. Doctoral Thesis, Lausanne, Switzerland: École Polytechnique Fédérale De Lausanne, 1994.

    Google Scholar 

  30. Lim W. L., Chew Y. T., Low H. T. et al. Cavitation phenomena in mechanical heart valves: the role of squeeze flow velocity and contact area on cavitation initiation between two impinging rods [J]. Journal of Biomechanics, 2003, 36(9): 1269–1280.

    Article  CAS  PubMed  Google Scholar 

  31. Nezu I. Turbulent structure in open-channel flows [EB/OL]. http://resolver.tudelft.nl/uuid:a41f39c2-fce6-4647-bd7a-1d412c720ed7 (Accessed 02-07-2023), 1977.

  32. Iyer C. O., Ceccio S. L. The influence of developed cavitation on the flow of a turbulent shear layer [J]. Physics of Fluids 2002, 14(10): 3414.

    Article  ADS  CAS  Google Scholar 

  33. Nezu I., Azuma R. Turbulence characteristics and interaction between particles and fluid in particle-laden open channel flows [J]. Journal of Hydraulic Engineering, ASCE, 2004, 130(10): 988–1001.

    Article  Google Scholar 

  34. Noguchi K., Nezu I. Particle-turbulence interaction and local particle concentration in sediment-laden open-channel flows [J]. Journal of Hydro-environment Research, 2009, 3(2): 54–68.

    Article  Google Scholar 

  35. Jin W. Cavitation generation and inhibition. I. Dominant mechanism of turbulent kinetic energy for cavitation evolution [J]. AIP Advances 2021, 11(6): 5028.

    Article  Google Scholar 

  36. Sereika J., Vilkinis P., Pedisius N. Analysis of cavity corner geometry effect on recirculation zone structure [J]. Applied Sciences, 2022, 12: 6288.

    Article  CAS  Google Scholar 

  37. Khan M. I., Simmons R. R., Grass A. I. Influence of cavity flow regimes on turbulence diffusion coefficient [J]. Journal of Visualization, 2006, 9(1): 57–68.

    Article  Google Scholar 

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Acknowledgement

(This research received no funding agency in the public, commercial, or not-for-profit sectors.)

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Authors and Affiliations

  1. Faculty of Engineering and Informatics, University of Bradford, Bradford, UK

    Chukwuemeka Kingsley John, Jaan H. Pu & Yakun Guo

  2. Department of Civil Engineering, Indian Institute of Technology, Kharagpur, India

    Prashanth R. Hanmaiahgari

  3. National Institute of Technology (NIT), Warangal, India

    Manish Pandey

Authors
  1. Chukwuemeka Kingsley John
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  2. Jaan H. Pu
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  3. Yakun Guo
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  4. Prashanth R. Hanmaiahgari
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Correspondence to Jaan H. Pu.

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Conflict of interest: The authors declare that they have no conflict of interest. All authors declare that there are no other competing interests.

Ethical approval: This article does not contain any studies with human participants or animals performed by any of the authors.

Informed consent: Informed consent was obtained from all individual participants included in the study.

Additional information

Biography: Chukwuemeka Kingsley John (1984-), Male, Ph. D.

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John, C.K., Pu, J.H., Guo, Y. et al. Flow turbulence presented by different vegetation spacing sizes within a submerged vegetation patch. J Hydrodyn 35, 1131–1145 (2023). https://doi.org/10.1007/s42241-024-0083-x

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  • DOI: https://doi.org/10.1007/s42241-024-0083-x

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