Computational Fluid Dynamics in the Age of Exascale Computing

The arrival of exascale computing platforms has marked a significant enhancement in the physical fidelity of simulations across a variety of fields. But, the ability of exascale platforms to attack the problem of turbulence has meant that computational fluid dynamics, in particular, as seen a flurry of recent activity. I will review some recent results on turbulence obtained on the world's first exascale supercomputer, Frontier, at Oak Ridge National Laboratory. The ability of Frontier to provide ample spatial resolution and reasonable computational speed has had a direct impact on our assault on this last great classical physics problem. Though we remain far away from directly resolving turbulent flows all the way down to the viscous dissipation scale, the insights we have been able glean recently from truly three-dimensional studies with good spatial resolution are contributing direct understanding that would be impossible without the raw computational power now available.