Smart Morphable Surfaces for Aerodynamic Drag Control

Authors

  • Denis Terwagne,

    1. Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
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    • Current address: Faculté des Sciences, Université Libre de Bruxelles (ULB), Bruxelles 1050, Belgium

  • Miha Brojan,

    1. Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
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    • Current address: Faculty of Mechanical Engineering, University of Ljubljana, Slovenia

  • Pedro M. Reis

    Corresponding author
    1. Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
    2. Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
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Abstract

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Smart Morphable Surfaces enable switchable and tunable aerodynamic drag reduction of bluff bodies. Their topography, resembling the morphology of golf balls, can be custom-generated through a wrinkling instability on a curved surface. Pneumatic actuation of these patterns results in the control of the drag coefficient of spherical samples by up to a factor of two, over a range of flow conditions.

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