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Progress and Future Challenges in Bionic Drag Reduction Research Inspired by Fish Skin Properties.

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Summary

Fish skin structures offer advanced drag reduction, inspiring biomimetic designs for underwater vehicles. This study categorizes these structures into riblet, flexible, and composite types, revealing their unique flow characteristics and drag reduction mechanisms.

Keywords:
composite drag reductionfish speciesflexible skinmucusriblet structure

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Area of Science:

  • Biomimetics and Fluid Dynamics
  • Marine Biology and Engineering

Background:

  • Fish have evolved complex skin structures for aquatic adaptation and efficient locomotion.
  • These structures play a crucial role in reducing fluid drag and enhancing swimming performance.

Purpose of the Study:

  • To explore the connection between fish skin complexity and drag reduction.
  • To offer novel design concepts for drag reduction surfaces on underwater vehicles.

Main Methods:

  • Categorization of biomimetic drag reduction technologies into riblet, flexible, and composite types.
  • Analysis of drag reduction mechanisms in shark skin (riblet) and dolphin skin (flexible).
  • Investigation of synergistic effects in composite drag reduction from other fish species.

Main Results:

  • Riblet structures, like shark skin, influence flow characteristics for drag reduction.
  • Flexible skin, exemplified by dolphins, contributes to drag reduction and high-speed movement.
  • Composite structures demonstrate synergistic effects for enhanced drag reduction.

Conclusions:

  • Fish skin structures provide diverse strategies for fluid drag reduction.
  • Biomimetic applications of these structures offer potential for improved underwater vehicle design.
  • Further research is needed to overcome challenges in bionic drag reduction technologies.