ORBITAL VELOCITIES IN IRREGULAR WAVES

F.C. Vis

Abstract


Experimental and theoretical study to determine the applicability of linear wave theory for the description of the velocity field in irregular waves. A comparison between theory and measurement was executed both in frequency and in time domain. In frequency domain by means of the experimentally and theoretically determined frequency response functions of wave motion to orbital velocity, and in time domain by means of the measured and computed time records of the velocities. The time records for the velocities were computed from the measured waterlevel fluctuations by using the impulse response function method. The orbital velocities were measured contactless with laser-doppler equipment.

Keywords


orbital velocity; particle velocity; irregular waves

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