Volume 16 Issue 4
Dec.  2023
Turn off MathJax
Article Contents
Article Navigation >  Water Science and Engineering  > 2023  >  16(4): 369-380
Farhad Bahmanpouri, Carlo Gualtieri, Hubert Chanson. 2023: Experiments on two-phase flow in hydraulic jump on pebbled rough bed: Part 2–Bubble clustering. Water Science and Engineering, 16(4): 369-380. doi: 10.1016/j.wse.2023.05.003
Citation: Farhad Bahmanpouri, Carlo Gualtieri, Hubert Chanson. 2023: Experiments on two-phase flow in hydraulic jump on pebbled rough bed: Part 2–Bubble clustering. Water Science and Engineering, 16(4): 369-380. doi: 10.1016/j.wse.2023.05.003
shu

Experiments on two-phase flow in hydraulic jump on pebbled rough bed: Part 2–Bubble clustering

doi: 10.1016/j.wse.2023.05.003

  • a Civil, Architectural and Environmental Engineering Department (DICEA), The University of Napoli Federico II, Via Claudio 21, Napoli 80125, Italy;

  • b School of Civil Engineering, The University of Queensland, Brisbane, QLD 4072, Australia

  • Received Date: 2022-10-12
  • Accepted Date: 2023-04-21
    • Available Online: 2023-12-14
    Abstract
  • A survey on bubble clustering in air–water flow processes may provide significant insights into turbulent two-phase flow. These processes have been studied in plunging jets, dropshafts, and hydraulic jumps on a smooth bed. As a first attempt, this study examined the bubble clustering process in hydraulic jumps on a pebbled rough bed using experimental data for 1.70 < Fr1 < 2.84 (with Fr1 denoting the inflow Froude number). The basic properties of particle grouping and clustering, including the number of clusters, the dimensionless number of clusters per second, the percentage of clustered bubbles, and the number of bubbles per cluster, were analyzed based on two criteria. For both criteria, the maximum cluster count rate was greater on the rough bed than on the smooth bed, suggesting greater interactions between turbulence and bubbly flow on the rough bed. The results were consistent with the longitudinal distribution of the interfacial velocity using one of the criteria. In addition, the clustering process was analyzed using a different approach: the interparticle arrival time of bubbles. The comparison showed that the bubbly flow structure had a greater density of bubbles per unit flux on the rough bed than on the smooth bed. Bed roughness was the dominant parameter close to the jump toe. Further downstream, Fr1 predominated. Thus, the rate of bubble density decreased more rapidly for the hydraulic jump with the lowest Fr1.

     

    • FullText(HTML)
  • loading
    • References(32)
  • [1]
    Aliseda, A., Lasheras, J.C., 2011. Preferential concentration and rise velocity reduction of bubbles immersed in a homogeneous and isotropic turbulent flow. Physic of Fluids 23(9), 093301. https://doi.org/10.1063/1.3626404.
    [2]
    Bahmanpouri, F., 2019. Experimental Study of Air Entrainment in Hydraulic Jump on Pebbled Rough Bed. Ph.D. Dissertation. The University of Napoli Federico II, Napoli. https://doi.org/10.13140/RG.2.2.27625.16485.
    [3]
    Bahmanpouri, F., Gualtieri, C., Chanson, H., 2019. Air-water flow characteristics in hydraulic jump on pebbled rough bed. In: Proceedings of the 38th IAHR World Congress, Panama City, pp. 2040-2048. https://doi.org/10.3850/38WC092019-0557.
    [4]
    Bahmanpouri, F., Gualtieri, C., Chanson, H., 2022. Air-water flow properties in hydraulic jumps on rough pebbled bed. ISH Journal of Hydraulic Engineering 1-10. https://doi.org/10.1080/09715010.2022.2068354.
    [5]
    Bahmanpouri, F., Gualtieri, C., Chanson, H., 2023. Flow patterns and free-surface dynamics in hydraulic jump on pebbled rough bed. Proceedings of the Institution of Civil Engineers - Water Management 176(1), 32-49. https://doi.org/10.1680/jwama.20.00040.
    [6]
    Bertola, N., Wang, H., Chanson, H., 2018. A physical study of air-water flow in planar plunging water jet with large inflow distance. International Journal of Multiphase Flow 100, 155-171. https://doi.org/10.1016/j.ijmultiphaseflow.2017.12.015.
    [7]
    Chachereau, Y., Chanson, H., 2011. Bubbly flow measurements in hydraulic jumps with small inflow Froude numbers. International Journal of Multiphase Flow 37(6), 555-564. https://doi.org/10.1016/j.ijmultiphaseflow.2011.03.012.
    [8]
    Chanson, H., Toombes, L., 2002. Air-water flows down stepped chutes: Turbulence and flow structure observations. International Journal of Multiphase Flow 28(11), 1737-1761. https://doi.org/10.1016/S0301-9322(02)00089-7.
    [9]
    Chanson, H., Aoki, S., Hoque, A., 2006. Bubble entrainment and dispersion in plunging jet flows: Freshwater versus seawater. Journal of Coastal Research 22(3), 664-677. https://doi.org/10.2112/03-0112.1.
    [10]
    Chanson, H., 2007. Bubbly flow structure in hydraulic jump. European Journal of Mechanics - B/Fluids 26(3), 367-384. https://doi.org/10.1016/j.euromechflu.2006.08.001.
    [11]
    Chanson, H., 2010. Convective transport of air bubbles in strong hydraulic jumps. International Journal of Multiphase Flow 36(10), 798-814. https://doi.org/10.1016/j.ijmultiphaseflow.2010.05.006.
    [12]
    Chanson, H., Chachereau, Y., 2013. Scale effects affecting two-phase flow properties in hydraulic jump with small inflow Froude number. Experimental Thermal and Fluid Science 45, 234-242. https://doi.org/10.1016/j.expthermflusci.2012.11.014.
    [13]
    Edwards, C.F., Marx, K.D., 1995a. Multipoint statistical structure of the ideal spray, Part I: Fundamental concepts and the realization density. Atomization and Sprays 5(4-5), 435-455. https://doi.org/10.1615/AtomizSpr.v5.i45.50.
    [14]
    Edwards, C.F., Marx, K.D., 1995b. Multipoint statistical structure of the ideal spray, Part II: Evaluating steadiness using the interparticle time distribution. Atomization and Sprays 5(4-5), 457-505. https://doi.org/10.1615/AtomizSpr.v5.i45.60.
    [15]
    Felder, S., 2013. Air-Water Flow Properties on Stepped Spillways for Embankment Dams: Aeration, Energy Dissipation and Turbulence on Uniform, Non-uniform and Pooled stepped chutes. Ph.D. Dissertation. The University of Queensland, Brisbane.
    [16]
    Figueroa-Espinoza, B., Zenit, R., 2005. Clustering in high Re monodispersed bubbly flows. Physics of Fluids 17(9), 091701. https://doi.org/10.1063/1.2055487.
    [17]
    Gualtieri, C., Chanson, H., 2004. Clustering process and interfacial area analysis in a large-size dropshaft. In: Mendes, A., Brebbia, C.A. (Eds.), Advances in Fluid Mechanics V. WIT Press, Ashurst, pp. 415-424.
    [18]
    Gualtieri, C., Chanson, H., 2007a. Clustering process analysis in a large-size dropshaft and in a hydraulic jump. In: DiSilvio, G., Lanzoni, S. (Eds.), Proceedings of the 32nd IAHR Biennial Congress. IAHR, Venice, Italy, pp. 1-11.
    [19]
    Gualtieri, C., Chanson, H., 2007b. Experimental analysis of Froude number effect on air entrainment in the hydraulic jump. Environmental Fluid Mechanics 7(3), 217-238. https://doi.org/10.1007/s10652-006-9016-1.
    [20]
    Gualtieri, C., Chanson, H., 2010. Effect of Froude number on bubble clustering in a hydraulic jump. Journal of Hydraulic Research 48(4), 504-508. https://doi.org/10.1080/00221686.2010.491688.
    [21]
    Gualtieri, C., Chanson, H., 2013. Interparticle arrival time analysis of bubble distributions in a dropshaft and hydraulic jump. Journal of Hydraulic Research 51(3), 253-264. https://doi.org/10.1080/00221686.2012.762430.
    [22]
    Hager, W.H., 1992. Energy Dissipaters and Hydraulic Jump. Kluwer Academic Publishers, Dordrecht.
    [23]
    Heinlein, J., Fritsching, U., 2006. Droplet clustering in sprays. Experiments in Fluids 40(3), 464-472. https://doi.org/10.1007/s00348-005-0087-4.
    [24]
    Henderson, F.M., 1966. Open Channel Flow. MacMillan Company, New York.
    [25]
    Luong, J.T.K., Sojka, P.E., 1999. Unsteadiness in effervescent sprays. Atomization and Sprays 9(1), 87-109. https://doi.org/10.1615/AtomizSpr.v9.i1.50.
    [26]
    Martinez-Bazan, C., Montanes, J.L., Lasheras, J.C., 2002. Statistical description of the bubble cloud resulting from the injection of air into a turbulent water jet. International Journal Multiphase Flow 28(4), 597-615. https://doi.org/10.1016/S0301-9322(01)00078-7.
    [27]
    Milenkovic, R.Z., Sigg, B., Yadigaroglu, G., 2007a. Bubble clustering and trapping in large vortices. Part 1: Triggered bubbly jets investigated by phase-averaging. International Journal of Multiphase Flow 33(10), 1088-1110. https://doi.org/10.1016/j.ijmultiphaseflow.2007.05.003.
    [28]
    Milenkovic, R.Z., Sigg, B., Yadigaroglu, G., 2007b. Bubble clustering and trapping in large vortices. Part 2: Time-dependent trapping conditions. International Journal of Multiphase Flow 33(10), 1111-1125. https://doi.org/10.1016/j.ijmultiphaseflow.2007.05.005.
    [29]
    Noymer, P.D., 2000. The use of single-point measurements to characterise dynamic behaviours in spray. Experiments in Fluids, Vol. 29, pp. 228-237.
    [30]
    Sun, S., Chanson, H., 2013. Characteristics of clustered particles in skimming flows on a stepped spillway. Environmental Fluid Mechanics 13(1), 73-87. https://doi.org/10.1007/s10652-012-9255-2.
    [31]
    Wang, H., 2014. Turbulence and Air Entrainment in Hydraulic Jumps. Ph.D. Dissertation. The University of Queensland, Brisbane. https://doi.org/10.14264/uql.2014.542.
    [32]
    Wang, H., Hu, Z., Chanson, H., 2015. Two-dimensional bubble clustering in hydraulic jumps. Experimental Thermal and Fluid Science 68, 711-721. https://doi.org/10.1016/j.expthermflusci.2015.07.006.
    • Relative Articles
    • Supplements(0)
    • Cited By
  • 加载中

Catalog

    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

    1. 本站搜索
    2. 百度学术搜索
    3. 万方数据库搜索
    4. CNKI搜索

    Figures(1)

    Get Citation
    PDF
    XML

    Article Metrics

    Article views (27) PDF downloads(0) Cited by()
    Proportional views
    Related

    Copyright © 2009 Editorial office of Water Science and Engineering 苏ICP备12023610号-1

    Supported by: Beijing Renhe Information Technology Co. Ltd   support: info@rhhz.net

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return