Water waves induced by a fluctuating tangential stress

Uji, Takeshi

doi:10.1007/bf02108632

Cited by 6 publications

(2 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thickening of a vortical layer over the windward face of a wavelet causes a positive pressure perturbation and energy is transferred to the wavelet when this positive pressure perturbation is in phase with downward motion. The two-dimensional analyses of Longuet-Higgins [1969] and Uji [1978] also indicated that the fluctuating shear stress is greatest at the crests and least in the troughs. They also showed that, with regard to the generation of waves by the wind, the effects of the fluctuating shear stress on waves are equivalent to a normal pressure fluctuation lagging in space ninety degrees behind the tangential stress.…”

Section: According To Flow Visuahzation Experiments Bymentioning

confidence: 99%

Modulated flows beneath wind‐ruffled, mechanically generated water waves

Jiang¹,

Street²

1991

J. Geophys. Res.

View full text Add to dashboard Cite

Data taken beneath wind‐ruffled, mechanically generated water waves in both the fixed‐probe and the wave‐following coordinate systems were analyzed. A phase‐averaging technique was used to define the component associated with the monochromatic, mechanically generated waves and to separate that component from the fluctuating one which is associated with ripples and turbulence. When observed in the wave‐following frame, maxima of the fluctuating normal stresses occur near the wave crest; the fluctuating shear stress is positive and possesses a peak on the windward face of the mechanically‐generated wave. The data in fixed‐probe and wave‐following measurements are consistent when an appropriate transformation is used between the two. The orbital velocities of waves were computed by our implementation of the nonlinear theory of Dean. Then, the modulated mean current was obtained by subtracting the orbital velocity of the wave and the time‐averaged velocity from the phase‐averaged velocity. The results show strong modulation in the current boundary layer. The horizontal component of the modulated mean current is positive in the trough of the carrier‐wave profile and negative near the crest. The range of fluctuation in a wave profile decays with depth.

show abstract

Section: According To Flow Visuahzation Experiments Bymentioning

confidence: 99%

Modulated flows beneath wind‐ruffled, mechanically generated water waves

Jiang¹,

Street²

1991

J. Geophys. Res.

View full text Add to dashboard Cite

show abstract

“…Uji (1978) showed analytically that neglecting the shear stress in the theory of wind-wave generation was not reasonable even if developed wind-waves seemed to be irrotational.…”

Section: Introductionmentioning

confidence: 99%

On a Method of Determining Friction Velocity in a Wind-wave Tunnel

Konishi¹,

Uji²

1979

Pap.Met.Geophy

Self Cite

View full text Add to dashboard Cite

A method of determining friction velocity u* by measurement in a wind-wave tunnel is proposed, based on the similarity law of the turbulent boundary layer. The method is based essentially on the application of a two-layer model to the velocity defect profile a logarithmic velocity distribution is applied to the inner boundary layer and Hama's profile, F=9.6(1-0)2, to the outer layer, where F is the non-dimensional velocity defect function, 7 the non-dimensional height.This method can determine friction velocity u* within a few percent of uncertainty, and has higher accuracy than the logarithmic method generally used, in some case of wind-wave tunnel experiments. The method works with precision if used in the early stage of development of the turbulent boundary layer, but not if used in the later stage, when the turbulent boundary layer has fully developed and the whole air flow in the wind-wave tunnel becomes turbulent.

show abstract

Bulk Parameterizations for the Wind Stress and Heat Fluxes

Geernaert

1990

Surface Waves and Fluxes

145

View full text Add to dashboard Cite

Water waves induced by a fluctuating tangential stress

Cited by 6 publications

References 9 publications

Modulated flows beneath wind‐ruffled, mechanically generated water waves

Modulated flows beneath wind‐ruffled, mechanically generated water waves

On a Method of Determining Friction Velocity in a Wind-wave Tunnel

Bulk Parameterizations for the Wind Stress and Heat Fluxes

Contact Info

Product

Resources

About