76th Annual Meeting of the APS Division of Fluid Dynamics (November 19, 2023 — November 21, 2023)

P0008: Hydroelastic

• View Larger
• Download Original

Authors

• John Antolik, Brown University
• Jesse Belden, Naval Undersea Warfare Center
• Nathan Speirs, Brigham Young University
• Daniel Harris, Brown University

DOI: https://doi.org/10.1103/APS.DFD.2023.GFM.P0008

When a solid body enters water with sufficient speed, it forms a trailing subsurface air cavity that typically features smooth walls until it eventually collapses. When the impactor is compliant, however, the force of impact excites structural vibrations of the impactor which can leave nested undulations along the cavity walls, as shown in the images.  Understanding the interplay between the hydrodynamics and elasticity (i.e. hydroelasticity) for impacting objects could have implications for biological divers or engineered naval and aerospace structures.