Wave-induced wind fluctuation over the sea
- 11 January 1972
- journal article
- research article
- Published by Cambridge University Press (CUP) in Journal of Fluid Mechanics
- Vol. 51 (4), 751-771
- https://doi.org/10.1017/s002211207200134x
Abstract
Simultaneous measurements of the sea surface displacement and the longitudinal component of the wind velocity at several levels are reported. They were obtained at the Marine Tower under various conditions, with the air and the waves moving either in the same or in opposite directions. The spectral analysis was made. The cross-correlation coefficient between the sea surface displacement and the wind velocity is large at the layer adjacent to the surface and decreases with increasing mean wind velocity and height. Below a certain level which is several times or several tens of times higher than the height of the critical level where the wind velocity component in the direction of wave propagation equals the wave velocity, the phase lag of the Fourier component of the wind velocity compared with the surface elevation component is about 160 to 190°. Above this layer the wave-induced wind component is very weak and the phase reversal takes place at the height where the mean wind velocity equals 1·2 to 1·5C, C being the phase velocity of wave. When the wind blows in the opposite direction from that of the wave propagation, the wind fluctuation is in phase with respect to the wave motion and the amplitude of wave-induced wind component is relatively large. Some discrepancies are shown between the observations and the predictions from the theory of inviscid fluids.Keywords
This publication has 20 references indexed in Scilit:
- Laboratory studies of the velocity field over deep-water wavesJournal of Fluid Mechanics, 1970
- On the turbulent flow over a wavy boundaryJournal of Fluid Mechanics, 1970
- Measurements of eddy-fluxes over the sea from an off-shore oil rigQuarterly Journal of the Royal Meteorological Society, 1970
- The turbulent boundary layer over a wall with progressive surface wavesJournal of Fluid Mechanics, 1970
- Laboratory studies of wind–wave interactionsJournal of Fluid Mechanics, 1968
- Experimental and theoretical investigation of the stability of air flow over a water surfaceJournal of Fluid Mechanics, 1968
- Direct Measurements of Stress and Spectra of Turbulence in the Boundary Layer Over the SeaJournal of the Atmospheric Sciences, 1967
- Physical interpretation of the mathematical theory of wave generation by windJournal of Fluid Mechanics, 1962
- On the generation of surface waves by shear flowsJournal of Fluid Mechanics, 1957
- The fundamental solution for small steady three-dimensional disturbances to a two-dimensional parallel shear flowJournal of Fluid Mechanics, 1957