Abstract
Parasitic capillary ripples generated on the forward face of the gravity-capillary waves are investigated experimentally. Using the optical technique, the slope angle of the wave is measured with sufficient space and time resolution to characterize the small ripple fluctuations. The ripple generation and its steepness is considered from the point of dominant wave asymmetry. Orthogonal wavelet transform is adopted to separate the small motions from the dominant waves, and the energy containing ratio is computed to discuss the ripple growth rate as a function of distance from the wave maker.
