Jacob, Sal, Hassan, and Gordon recently published the “Free-Decay Heave Motion of a Spherical Buoy” in Fluids. The buoy response was explored using experimental measurements and complementary numerical simulations. The experiments were performed using MTU Wave’s Qualisys motion-capture system and wave gauges. The simulations included three sets of calculations with varying levels of sophistication. In one set, the volume-of-fluid (VOF) method was used to solve the incompressible, two-phase, Navier–Stokes equations on an overset grid, whereas…