Bionic Research on Fish Scales for Drag Reduction

doi:10.1016/S1672-6529(11)60140-6

摘要/Abstract

摘要：

To reduce friction drag with bionic method in a more feasible way, the surface microstructure of fish scales was analyzed attempting to reveal the biologic features responding to skin friction drag reduction. Then comparable bionic surface mimicking fish scales was fabricated through coating technology for drag reduction. The paint mixture was coated on a substrate through a self-developed spray-painting apparatus. The bionic surface with micron-scale caves formed spontaneously due to the interfacial convection and deformation driven by interfacial tension gradient in the presence of solvent evaporation. Comparative experiments between bionic surface and smooth surface were performed in a water tunnel to evaluate the effect of bionic surface on drag reduction, and visible drag reduction efficiency was obtained. Numerical simulation results show that gas phase develops in solid-liquid interface of bionic surface with the effect of surface topography and partially replaces the solid-liquid shear force with gas-liquid shear force, hence reducing the skin friction drag effectively. Therefore, with remarkable drag reduction performance and simple fabrication technology, the proposed drag reduction technique shows the promise for practical applications.

关键词: drag reduction, micro-structured bionic surface, fish scales, polymer coating, interfacial convection and deformation

Abstract:

Key words: drag reduction, micro-structured bionic surface, fish scales, polymer coating, interfacial convection and deformation

Zhaoliang Dou, Jiadao Wang, Darong Chen. Bionic Research on Fish Scales for Drag Reduction[J]. J4, 2012, 9(4): 457-464.

参考文献

[1] Choi H, Moin P, Kim J. Active turbulence control for drag reduction in wall-bounded flows. Journal of Fluid Mechanics, 1994, 262, 75–110.

[2] Kang S, Choi H. Active wall motions for skin-friction drag reduction. Physics of Fluids, 2000, 12, 3301–3304.

[3] Ren L. Progress in the bionic study on anti-adhesion and resistance reduction of terrain machines. Science in China Series E: Technological Sciences, 2009, 52, 273–284.

[4] Scherge M, Gorb S N. Microtribology of biological materials. Tribology Letters, 2000, 8, 1–7.

[5] Walsh M J. Riblets as a viscous drag reduction technique. American Institute of Aeronautics and Astronautics(AIAA) Journal, 1983, 21, 485–486.

[6] Bechert D W, Bruse M, Hage W, Meyer R. Fluid mechanics of biological surfaces and their technological application. Naturwissenschaften, 2000, 87, 157–171.

[7] Tian L, Ren L, Han Z, Zhang S. Experiment about drag reduction of bionic non-smooth surface in low speed wind tunnel. Journal of Bionic Engineering, 2005, 2, 15–24.

[8] Johnson D, Narayanan R. Marangoni convection in multiple bounded fluid layers and its application to materials processing. Philosophical Transactions of the Royal Society A, 1998, 356, 885–898.

[9] Jukes P C, Heriot S Y, Sharp J S, Jones R A L. Time- resolved light scattering studies of phase separation in thin film semiconducting polymer blends during spin-coating. Macromolecules, 2005, 38, 2030–2032.

[10] Charon D, Mondange M, Pons J F, Le Blay K, Chaby R, Maruyama N, Karthaus O, Ijiro K, Shimomura M, Koito T, Nishimura S, Sawadaishi T, Nishi N, Tokura S. Mesoscopic pattern formation of nanostructured polymer assemblies. Supramolecular Science, 1998, 5, 331–336.

[11] Srinivasarao M, Collings D, Philips A, Patel S. Three-dimensionally ordered array of air bubbles in a polymer Film. Science, 2001, 292, 79–83.

[12] Videler J. Body surface adaptations to boundary-layer dynamics. Symposia of the Society for Experimental Biology, 1995, 49, 1–20.

[13] Videler J. Extreme drag reducing adaptations in the Swordfish Xiphias gladius. Comparative Biochemistry and Physiology A, 2007.

[14] Ovchinnikov V V. Swordfishes and Billfishes in the Atlantic Ocean: Ecology and Functional Morphology. Atlantic Science Research Institute of Fisheries and Oceanography Report, Kalingrad, USSR, 1971. (translated from Russian)

[15] Borciaa R, Bestehorn M. Phase-field simulations for evaporation with convection in liquid-vapor systems. The European Physics Journal B: Condensed Matter and Complex Systems, 2005, 44, 101–108.

[16] Souche M, Clarke N. Interfacial instability in bilayer films due to solvent evaporation. The European Physics Journal E: Soft Matter and Biological Physics, 2009, 28, 47–55.

[17] Ozen O, Johnson D, Narayanan R. Observations on interfacial convection in multiple layers without and with evaporation. Lecture Notes in Physics, 2003, 628, 59–77.

[18] Knapp R T, Daily J W, Hammitt F G. Cavitation, McGraw- Hill, New York, USA, 1970.