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Transcript

SHARK SKIN DRAG REDUCTION

Ana María Araújo Cordero

Materials

Fastskin Speedo

Riblet

Results

Introduction

Summary

Shark skin

Riblet Materia

Speedo Fastskin

References

Mako

Porbeagle

Questions

10 min

  • Bhushan, B. (2011). Biomimetics inspired surfaces for drag reduction and oleophobicity/philicity. Beilstein Journal of nanotechnology(2), 66-84.
  • Dean, B., & Bhushan, B. (2010). Shark-skin surface for fluid-drag reduction in turbulent flow: a review. The royal society(368), 4775-4806.
  • Oeffner, J., & Lauder, G. V. (2011). The hydrodynamic function of shark skin and two biomimetic applications. The Journal of Experimental Biology(215), 785-795.
  • Quantified the possible locomotion benefits of the surface denticles on the skin
  • Analized swimming performance of two biomimetic shark skin inspired materials
  • Speedo fastskin fabric
  • Ribbed rubber engineering material
  • Shark denticles had no beneficial effects on locomotion on the rigid shark skin foil
  • Denticles did improve swimming performance (12.4%) on a flexible shark skin membrane foil
  • No drag reduction was achieved with the Speedo material
  • Engineered riblet material has drag reduction
  • High performance surfaces
  • Shark skin is covered small dermal denticles.
  • Reduce vortices formation
  • Drag reduction->Water moves efficiently
  • Protection from marine fouling -> adhesion and growth of marine organisms

Shark Skin

Mako membrane 1

Mako membrane 2

Porbeagle membrane

Materials and methods

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