Computational Study of Water Entry of Spinning Solid Cylinders of Various Nose Curvatures

Using an in-house multi-phase flow solver, we performed simulations to investigate water entry of cylindrical solids undergoing controlled spinning motion about their axis. Varying the cylinder’s nose curvature, this computational study examined the effects of nose curvature and spinning rotational motion on water entry dynamics, including splash formation, cavity dynamics, and air entrapment. The interplay between rotation rate and nose curvature was analyzed to elucidate how these factors affect the surrounding flow field, solid deceleration, added mass of water, and cavity closure mechanisms. Velocity and pressure fields of air and water around the solid object, particularly its nose, were resolved to highlight the impact of rotational motion on fluid-structure interactions. These findings contribute to understanding of the spinning motion effects on the dynamics of water entry of solid objects of various nose curvatures.