Wind waves impact on the velocity in wave boundary layer in the condition of dynamically smooth surface
https://doi.org/10.59887/2073-6673.2023.16(4)-2
Abstract
One of the factors of wind wave impact on vertical distributions in atmosphere surface layer is the flux of momentum produced by the wave-produced fluctuations. Wave surface are supposed to be a dynamically rough and effects of the molecular viscosity are neglected. In this paper impact of wave momentum fluxes with values of wind velocity which lead to dynamically smooth ocean surface is estimated. The well-known theoretical aspects and results of experimental research are applied. Dependence of dimensionless thickness of viscosity layer on dimensionless roughness of smooth surface is analyzed. The equations of motion are formed taking into account the manifestation of three factors: molecular, turbulent and wave momentum flux. The models based on these equations are described.
The choice of constant coefficients that are set in calculations with this model is considered. Results of calculations and analysis of vertical profiles of wind speed and the dependence of the drag coefficient on wind velocity under various wave age.
Supporting agencies: The work was carried out within the framework of the state assignment No. FMWE-2021–0014.
About the Authors
K. L. Yegorov
Russian State Hydrometeorology University
Russian Federation
Russian Federation
98 Malookhtinsky Pr., St. Petersburg, 195196
K. Yu. Bulgakov
Shirshov Institute оf Oceanology, Russian Academy of Sciences
Russian Federation
Russian Federation
36 Nakhimovsky Prosp., Moscow, 117997
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Review
For citations:
Yegorov K.L., Bulgakov K.Yu. Wind waves impact on the velocity in wave boundary layer in the condition of dynamically smooth surface. Fundamental and Applied Hydrophysics. 2023;16(4):18-31. (In Russ.) https://doi.org/10.59887/2073-6673.2023.16(4)-2
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