Wave slam on a sphere penetrating a free surface

✍ Scribed by T. Miloh

• Book ID: 104620186
• Publisher: Springer
• Year: 1981
• Tongue: English
• Weight: 907 KB
• Volume: 15
• Category: Article
• ISSN: 0022-0833
• DOI: 10.1007/bf00042782

✦ Synopsis

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.