Water entry dynamics of spheres with heterogeneous wetting properties
Daren A. Watson, Joshua M. Bom, Madison P. Weinberg, Christopher J. Souchik, Andrew K. Dickerson
Abstract
Water entry studies traditionally employ homogeneous projectiles of varying impactor shape, entry speed, and surface roughness. Surface heterogeneity is yet another means to manipulate splash dynamics. In this experimental study, we systematically investigate the water entry of smooth, free-falling, hemispherically-coated spheres for Froude numbers in the range of 2.8-6.7. Half-hydrophobic, half-hydrophilic spheres released in various orientations produce deep seal cavities, and provoke orientation dependent super-surface splash features and sphere dynamics.
Topics & Concepts
SplashSPHERESWettingFroude numberMaterials scienceDynamics (music)HomogeneousMechanicsSurface roughnessDewettingSurface (topology)Range (aeronautics)GeometryComposite materialPhysicsMathematicsMeteorologyBreakupThermodynamicsAstronomyAcousticsFluid Dynamics Simulations and InteractionsFluid Dynamics and Heat TransferSurface Modification and Superhydrophobicity