Title :
Wave tank study of the damping of mm-scale wind waves by surface films
Author :
Ermakov, S.A. ; Sergievskaya, I.A. ; Zuikova, E.M. ; Goldblat, V.Yu. ; Shchegolkov, Yu.B. ; Scott, J.C.
Author_Institution :
Inst. of Appl. Phys., Acad. of Sci., Nizhny Novgorod, Russia
Abstract :
Presents new extended measurements of wind waves in the presence of artificial organic films, using two optical spectrum analysers, one measuring phase velocities and the other measuring variations of the wavenumber spectrum of the wind waves. It has been found that, in the presence of films, the observed phase velocities are closer to those of free linear gravity-capillary waves than they are in the case of clean water. This can be explained by the bound waves being more strongly damped than the free waves. The relation between bound and free waves is estimated from measurements of phase velocity. Wind ripple damping has been found to be maximum at wavelengths around 5-7 mm. This is in agreement with the predictions of the new mechanism, and it also agrees with field experiments using artificial slicks
Keywords :
damping; liquid films; water pollution; water waves; artificial organic films; artificial slicks; bound waves; damped waves; field experiments; free linear gravity-capillary waves; mm-scale wind waves damping; optical spectrum analysers; phase velocities; phase velocity; surface films; wave tank study; wavenumber spectrum; wind ripple damping; Damping; Nonlinear optics; Optical films; Optical surface waves; Phase measurement; Pollution measurement; Surface waves; Velocity measurement; Wavelength measurement; Wind speed;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 1999. IGARSS '99 Proceedings. IEEE 1999 International
Conference_Location :
Hamburg
Print_ISBN :
0-7803-5207-6
DOI :
10.1109/IGARSS.1999.774509
