aerodynamically active (hydroactive for motion in water): a streamlined aeroactive body — usually of arf — laminarizes the air flow around itself to decrease effective viscosity and drag; each microscopic cell on the surface tracks the gas/fluid dynamics in its vicinity, models, predicts, and periodically emits a tiny exhaust calculated to put out the turbulence vortex about to form; dynamic associations of cells coordinate their exhausts to suppress larger vortices. Essential for things that fly — craft, humans (aeroactive clothing for vehicless travel), homes — aeroactivity inhibits turbulence in a wide range of scales and airspeeds: its like sliding inside an air cushion where velocity falls off smoothly with the distance from surface — unusually quiet and steady, it incurs minimum drag (coefficients below 0.01) and negligible surface wear.

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