In the early hours of Saturday May 6, at the Monza motor racing circuit in Italy, Eliud Kipchoge ran 26.2 miles in 2 hours and 25 seconds, beating the existing marathon world record by 2 minutes and 32 seconds. The run was the culmination of Nike's "Breaking 2" project, a two year program aimed at demonstrating that it is physically possible for a human to run a marathon in less than two hours. In order to determine just how much influence "aerodynamic trickery" had in getting Kipchoge within 26 seconds of the mythical 2 hour barrier, we decided to run a series of computational fluid dynamics using STAR-CCM+, which is part of Siemens` Simcenter portfolio of simulation tools.
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