The Tesla Model S electric car has one of the lowest drag coefficients of any vehicle currently in production, which helps it make the most of each battery charge.
Part of what allowed engineers pull that off is a rendering program called PowerFLOW, made by Exa Corporation. According to Teslarati, the software essentially creates a “digital wind tunnel” that allows engineers to see airflow and make adjustments more easily.
The software was particularly useful in shaping the rear of the car, where airflow is more complex, Tesla lead aerodynamicist Rob Palin told SAE International. Other areas required extra attention to reduce aerodynamic drag.