Effect of Surface Condition of a Sphere on Its Water-Entry Cavity
- 1 October 1951
- journal article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 22 (10) , 1219-1222
- https://doi.org/10.1063/1.1699831
Abstract
An investigation of factors which influence the formation of a cavity when a sphere enters water vertically is described. It was found that cavities are formed at much lower entry speeds for contaminated spheres than for clean ones, but that there is little dependence on the type of the contaminant. In regard to the scaling of this effect, the tendency to form a cavity varies little with change of size or specific gravity of the sphere. Water‐entry cavities are observed to form at velocities much lower than those required for incipient cavitation in the water tunnel; consequently, a relation between the two effects appears improbable. Some dependence of cavity formation on viscosity might be inferred from the observation that cavities were formed at lower entry speeds by spheres coated with liquids of high viscosity than by spheres without this coating.This publication has 3 references indexed in Scilit:
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- LXXVI. On the impact of a solid sphere with a fluid surface and the influence of surface tension, surface layers, and viscosity on the phenomenonJournal of Computers in Education, 1924
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