Wave forces on horizontal cylinders at low Keulegan-Carpenter and Reynolds numbers

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:260385

Koterayama, Wataru; Hu, C ^[1]

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1. Kyushu Univ., Kasuga (Japan)

Hydrodynamic forces on a horizontal cylinder with circular and elongated rectangular cross-section in regular waves are studied experimentally and numerically. In the laboratory experiment, the cylinder is fixed beneath waves with its axis parallel to the wave crests. The kinematics of the wave flow are determined from linear wave using measured wave height and period, and the experiment is conducted at low K{sub C} and relatively low R{sub e} values (K{sub C} < 6 and 10,000 < R{sub e} < 30,000). In addition, the authors present a numerical simulation method for a two dimensional flow around a cylinder undergoing orbital motion in still water. For the elongated rectangular cylinder, the force coefficients are much more complicated than the circular cylinder because the flow always separates. It is found that the forces on a elongated rectangular cylinder fixed in waves are generally much larger than that harmonically oscillating in still water at the same K{sub C} and R{sub e} numbers.

• OSTI ID: 260385
• Report Number(s): CONF-950604--; ISBN 1-880653-19-2
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
BENCH-SCALE EXPERIMENTS
CALCULATION METHODS
DYNAMIC LOADS
FLUID-STRUCTURE INTERACTIONS
MATHEMATICAL MODELS
OFFSHORE PLATFORMS
RESPONSE FUNCTIONS
WATER WAVES
WAVE FORCES