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ATTI - Simulating Realistic Wind

Exa Corporation explains how transient flow simulations can enable more realistic reproduction of real-world conditions for accurate assessment of fuel economy

For a typical car driving at highway speeds, about 50% of the energy is spent overcoming aerodynamic drag and the other 50% is required to overcome the mechanical losses (engine, transmission, tires, ancillary systems, etc.). This means that every 2% in aerodynamic drag reduction translates to a 1% improvement in fuel economy.