Water entry and exit of horizontal circular cylinders. (English) Zbl 0890.76010

The authors discuss the free-surface flows generated by a forced motion of a submerged circular cylinder. Two cases are studied. First, a totally submerged circular cylinder moves with constant velocity in vertical or horizontal directions. Results are compared with small-time asymptotic solutions, and excellent agreement is obtained. The numerical calculations give accurate results, until the free surface breaks down. Secondly, the free-surface pressures and forces acting on a cylinder in vertical forced motion during engulfment, when it submerges from being initially half-submerged, are studied. The free surface displacement may be violent after the inrushing layers of water meet on the top of the cylinder.


76B10 Jets and cavities, cavitation, free-streamline theory, water-entry problems, airfoil and hydrofoil theory, sloshing
76M25 Other numerical methods (fluid mechanics) (MSC2010)
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