Momentum and buoyancy transfer in atmospheric turbulent boundary layer over wavy water surface – Part 1: Harmonic wave

Momentum and buoyancy transfer in atmospheric turbulent boundary layer over wavy water surface – Part 1: Harmonic wave

The surface-drag and mass-transfer coefficients are determined within a self-consistent problem of wave-induced perturbations and mean fields of velocity and density in the air, using a quasi-linear model based on the Reynolds equations with down-gradient turbulence closure. Investigation of a harmo...

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Bibliographic Details
Published in:Nonlinear processes in geophysics Vol. 20; no. 5; pp. 825 - 839
Main Authors: Troitskaya, Yu. I., Ezhova, E. V., Zilitinkevich, S. S.
Format: Journal Article
Language:English
Published: Gottingen Copernicus GmbH 29-10-2013
Copernicus Publications
Subjects:
Aerodynamics
Boundary layer
Buoyancy
Computational fluid dynamics
Density
Fluid flow
Harmonics
Reynolds equation
Stratification
Turbulence
Turbulent flow
Velocity
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Summary:The surface-drag and mass-transfer coefficients are determined within a self-consistent problem of wave-induced perturbations and mean fields of velocity and density in the air, using a quasi-linear model based on the Reynolds equations with down-gradient turbulence closure. Investigation of a harmonic wave propagating along the wind has disclosed that the surface drag is generally larger for shorter waves. This effect is more pronounced in the unstable and neutral stratification. The stable stratification suppresses turbulence, which leads to weakening of the momentum and mass transfer.
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ISSN:1607-7946
1023-5809
1607-7946
DOI:10.5194/npg-20-825-2013