Drag Coefficients of Steel Spheres Entering Water Vertically
- 1 December 1948
- journal article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 19 (12) , 1109-1121
- https://doi.org/10.1063/1.1715027
Abstract
Drag coefficients have been determined from high speed motion pictures for ¼‐inch to 1½‐inch steel spheres shot into water vertically with speeds from 25 to 208 ft./sec. These drag coefficients correspond to the entrance cavity phase and to the v‐squared‐law drag forces only, the immediate effects on the spheres of other forces being eliminated in the calculations. It is found that CD is a function of both the Reynolds and Froude Numbers. Within the range investigated, the dependence may be expressed by CD=0.0174 ln(RF½).This publication has 2 references indexed in Scilit:
- High-Speed Motion Pictures with Synchronized Multiflash LightingJournal of the Society of Motion Picture Engineers, 1948
- Influence of Atmospheric Pressure on the Phenomena Accompanying the Entry of Spheres into WaterJournal of Applied Physics, 1948