Title :
Ring-waves generated by water drops impacting on water surfaces at rest
Author :
Craeye, Christophe ; Sobieski, Piotr W. ; Bliven, Larry F. ; Guissard, Albert
Author_Institution :
Univ. Catholique de Louvain, Belgium
fDate :
7/1/1999 12:00:00 AM
Abstract :
Radar observations of the ocean surface can be affected by impacting raindrops. Ring-wave measurements are presented for drops of 2.2 and 2.8 mm in diameter impacting on fresh and salt water surfaces initially at rest. They are based on the observation of the mirror image of a sharp edge on the perturbed surface. The retrieved wave profiles show a rather stable characteristic wavenumber (0.2 mm-1) and very small wave amplitudes: the fraction of the incident kinetic energy converted into ring-waves is of the order of 1%
Keywords :
capillary waves; drops; gravity waves; ocean waves; rain; vortices; water waves; 2.2 mm; 2.8 mm; circular gravity-capillary waves; circular surface waves; fresh water surfaces; impacting raindrops; mirror image; ocean surface; optical technique; perturbed surface; radar observations; ring-waves generation; salt water surfaces; sharp edge; slope estimation; stable characteristic wavenumber; very small wave amplitudes; water drops impact; water surfaces at rest; wave kinetic energy; Frequency estimation; Kinetic energy; Measurement techniques; Mirrors; Oceans; Optical surface waves; Radar imaging; Sea measurements; Sea surface; Surface waves;
Journal_Title :
Oceanic Engineering, IEEE Journal of
