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Programmable Surface Dimpling of Textile Metamaterials for Aerodynamic Control.

David T Farrell1, Connor M McCann1, Antonio Elia Forte1,2

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Summary
This summary is machine-generated.

Researchers developed a novel textile metamaterial that adapts its aerodynamic profile using a stretch-induced dimpling mechanism. This innovation allows for up to 20% drag modulation, enhancing performance in dynamic conditions for sports and engineering.

Keywords:
aerodynamicmetamaterialprogrammablesurface dimplingtextilewearable

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Area of Science:

  • Materials Science
  • Fluid Dynamics
  • Aerodynamics

Background:

  • Static aerodynamic surfaces struggle with dynamic conditions, limiting performance in fields like competitive sports.
  • Textile properties often mismatch highly variable wind-speed profiles encountered in activities such as cycling and skiing.

Purpose of the Study:

  • To introduce a textile metamaterial capable of variable aerodynamic profiles via a stretch-induced dimpling mechanism.
  • To characterize and optimize this metamaterial's aerodynamic performance for dynamic environments.

Main Methods:

  • Wind-tunnel experiments were conducted to measure the variable aerodynamic performance of the dimpling mechanism.
  • Finite Element (FE) simulations were employed to explore the design space and identify optimal textile metamaterial architectures.
  • The effect of dimple size on aerodynamic performance was investigated.

Main Results:

  • Controlling dimple size allows tailoring textile aerodynamic performance for specific wind-speed ranges.
  • Drag force can be modulated by up to 20% at target wind-speeds.
  • Active control of textile aerodynamics was demonstrated, enabling sustained optimal performance across dynamic wind profiles.

Conclusions:

  • Surface dimpling in textile metamaterials offers a new approach to variable fluid-dynamic properties.
  • This technology has transformative applications for wearables, aerospace, maritime, and civil engineering systems.
  • The findings establish a new paradigm for adaptive aerodynamic surfaces.