Abstract
The problem of vertical motion of a sphere across an oscillating free surface is analysed by assuming the fluid to be inviscid and the free surface to be an equipotential surface. New analytical solutions for the added-mass coefficients of a double spherical bowl are derived. These are used in the derivation of the drag coefficient of a sphere during vertical entry and of the slamming coefficient of a fixed sphere which is exposed to wave action. An additional important parameter in hydroballistics is the wetting factor of a sphere penetrating a free surface for which a new analytic solution is also derived in this paper. A comparison between some experimental data and the analytic expressions for the slamming coefficient and the wetting factor, shows good agreement between theory and measurements.
| Original language | English |
|---|---|
| Pages (from-to) | 221-240 |
| Number of pages | 20 |
| Journal | Journal of Engineering Mathematics |
| Volume | 15 |
| Issue number | 3 |
| DOIs | |
| State | Published - Jul 1981 |
| Externally published | Yes |