Journal of Bionic Engineering

, Volume 15, Issue 3, pp 516–525 | Cite as

Propulsion Principles of Water Striders in Sculling Forward through Shadow Method

  • Hongyu Lu
  • Yelong Zheng
  • Wei Yin
  • Dashuai Tao
  • Noshir Pesika
  • Yonggang Meng
  • Yu Tian
Article
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Abstract

Semi-aquatic arthropods skate on water surfaces with synergetic actions of their legs. The sculling forward locomotion of water striders was observed and analyzed in situ to understand and reproduce the abovementioned feature. The bright–edged elliptical shadows of the six legs of a water strider were recorded to derive the supporting force distributions on legs. The propulsion principles of water striders were quantitatively disclosed. A typical sculling forward process was accomplished within approximately 0.15 s. Water striders lifted their heads slightly and supported their weight mainly by the two driving legs to increase the propulsion force and reduce the water resistance during the process. The normalized thrust–area ratio (defined as the ratio of the propulsion force to the projected area) was usually lower than 0.4 after sculling for approximately 0.08 s. The entire normal supporting force remained nearly constant during a stroke to reduce the mass center fluctuation in the normal direction. In addition, water striders could easily control the locomotion direction and speed through the light swinging of the two hind legs as rudders. These sculling principles might inspire sophisticated biomimetic water-walking robots with high propulsion efficiency in the future.

Keywords

shadow method water strider sculling forward locomotion propulsion principle 

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Notes

Acknowledgments

This work is supported by the National Natural Science Foundation of China (Grant No. 51425502).

References

  1. [1]
    Bowdan E. Walking and rowing in water strider, gerris- remigis. I. Cinematographic analysis of walking. Journal of Comparative Physiology, 1978, 123, 43–49.Google Scholar
  2. [2]
    Hu D L, Chan B, Bush J W M. The hydrodynamics of water strider locomotion. Nature, 2003, 424, 663–666.CrossRefGoogle Scholar
  3. [3]
    Gao X, Jiang L. Biophysics: Water-repellent legs of water striders. Nature, 2004, 432, 36.CrossRefGoogle Scholar
  4. [4]
    Feng X Q, Gao X F, Wu Z N, Jiang L, Zheng Q S. Superior water repellency of water strider legs with hierarchical structures: Experiments and analysis. Langmuir, 2007, 23, 4892–4896.CrossRefGoogle Scholar
  5. [5]
    Bush J W M, Hu D L. Walking on water: Biolocomotion at the interface. Annual Review of Fluid Mechanics, 2006, 38, 339–369.MathSciNetCrossRefMATHGoogle Scholar
  6. [6]
    Hu D L, Bush J W M. The hydrodynamics of water-walking arthropods. Journal of Fluid Mechanics, 2010, 644, 5–33.CrossRefMATHGoogle Scholar
  7. [7]
    Denny M W. Air and Water: The Biology and Physics of Life’s Media, Princeton University Press, Princeton, New Jersey, USA, 1993.Google Scholar
  8. [8]
    Denny M W. Paradox lost: Answers and questions about walking on water. Journal of Experimental Biology, 2004, 207, 1601–1606.CrossRefGoogle Scholar
  9. [9]
    Suter R B,Wildman H. Locomotion on the water surface: Hydrodynamic constraints on rowing velocity require a gait change. Journal of Experimental Biology, 1999, 202, 2771–2785.Google Scholar
  10. [10]
    Koh J S, Yang E, Jung G P, Jung S P, Son J H, Lee S I, Jablonski P G, Wood R J, Kim H Y, Cho K J. Jumping on water: Surface tension-dominated jumping of water striders and robotic insects. Science, 2015, 349, 517–521.CrossRefGoogle Scholar
  11. [11]
    Song Y S, Suhr S H, Sitti M. Modeling of the supporting legs for designing biomimetic water strider robots. IEEE International Conference on Robotics and Automation, Orlando, FL, USA, 2006.Google Scholar
  12. [12]
    Hsieh S T, Lauder G V. Running on water: Threedimensional force generation by basilisk lizards. Proceedings of the National Academy of Sciences of the United States of America, 2004, 101, 16784–16788.CrossRefGoogle Scholar
  13. [13]
    Xu L S, Mei T, Wei X M, Cao K, Luo M Z. A bio-inspired biped water running robot incorporating the watt-I planar linkage mechanism. Journal of Bionic Engineering, 2013, 10, 415–422.CrossRefGoogle Scholar
  14. [14]
    Hu D L, Prakash M, Chan B, Bush J W M. Water-walking devices. Experiments in Fluids, 2007, 43, 769–778.CrossRefGoogle Scholar
  15. [15]
    Suhr S H, Song Y S, Lee S J, Sitti M. Biologically inspired miniature water strider robot. Robotics: Science and Systems, 2005, 1, 319–325.Google Scholar
  16. [16]
    Song Y S, Sitti M. Surface-tension-driven biologically inspired water strider robots: Theory and experiments. IEEE Transactions on Robotics, 2007, 23, 578–589.CrossRefGoogle Scholar
  17. [17]
    Yan J H, Zhang X B, Zhao J, Liu G F, Cai H G, Pan Q M. A miniature surface tension-driven robot using spatially elliptical moving legs to mimic a water strider’s locomotion. Bioinspiration & Biomimetics, 2015, 10, 046016.CrossRefGoogle Scholar
  18. [18]
    Kim H G, Liu Y H, Jeong K, Seo T W. Empirical study on shapes of the foot pad and walking gaits for water-running robots. Journal of Bionic Engineering, 2014, 11, 572–580.CrossRefGoogle Scholar
  19. [19]
    Suter R B, Rosenberg O, Loeb S, Wildman H, Long J H. Locomotion on the water surface: Propulsive mechanisms of the fisher spider dolomedes triton. Journal of Experimental Biology, 1997, 200, 2523–2538.Google Scholar
  20. [20]
    Yin W, Zheng Y L, Lu H Y, Zhang X J, Tian Y. Three-dimensional topographies of water surface dimples formed by superhydrophobic water strider legs. Applied Physics Letters, 2016, 109, 163701.CrossRefGoogle Scholar
  21. [21]
    Keller J B. Surface tension force on a partly submerged body. Physics of Fluids, 1998, 10, 3009–3010.MathSciNetCrossRefMATHGoogle Scholar
  22. [22]
    Wilson R M. Archimedes’s principle gets updated. Physics Today, 2012, 65, 15–17.Google Scholar
  23. [23]
    Leenaars A F M, Obrien S B G. Particle removal from silicon substrates using surface-tension forces. Philips Journal of Research, 1989, 44, 183–209.Google Scholar
  24. [24]
    Zheng Y L, Lu H Y, Yin W, Tao D S, Shi L C, Tian Y. Elegant shadow making tiny force visible for water-walking arthropods and updated archimedes’ principle. Langmuir, 2016, 32, 10522–10528.CrossRefGoogle Scholar
  25. [25]
    Young T. An essay on the cohesion of fluids. Philosophical Transactions: The Royal Society, London, 1805, 95, 65–87.CrossRefGoogle Scholar
  26. [26]
    Caplan N, Coppel A, Gardner T. A review of propulsive mechanisms in rowing. Proceedings of the Institution of Mechanical Engineers Part P-Journal of Sports Engineering and Technology, 2010, 224, 1–8.CrossRefGoogle Scholar

Copyright information

© Jilin University 2018

Authors and Affiliations

  • Hongyu Lu
    • 1
  • Yelong Zheng
    • 2
  • Wei Yin
    • 3
  • Dashuai Tao
    • 1
  • Noshir Pesika
    • 4
  • Yonggang Meng
    • 1
  • Yu Tian
    • 1
  1. 1.State Key Laboratory of TribologyTsinghua UniversityBeijingChina
  2. 2.State Key Laboratory of Precision Measuring Technology and InstrumentTianjin UniversityTianjinChina
  3. 3.Lubrication and Friction Testing Center, Tianjin Research Institute for Advanced EquipmentTsinghua UniversityTianjinChina
  4. 4.Chemical & Biomolecular Engineering DepartmentTulane UniversityNew OrleansUSA

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