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Home List of Titles Coupled numerical modelling of wind and waves and the theory of the wave boundary layer
Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/94753
- Coupled numerical modelling of wind and waves and the theory of the wave boundary layer
- Chalikov, D.; Rainchik, S.
- The description of a coupled wind and wave model in conformal coordinates is given. The wave model is based on potential equations for the flow with a free surface, extended with the algorithm of breaking dissipation. The wave boundary-layer (WBL) model is based on the Reynolds equations with the K − ε closure scheme with the solutions for air and water matched through the interface. The structure of the WBL and vertical profiles of the wave-produced momentum flux (WPMF) in a long-term simulation of the coupled dynamics are investigated and parameterized. The shape of the β function connecting elevation and surface pressure is studied up to high nondimensional wave frequencies. The errors of a linear presentation of the surface pressure are estimated. The β function and the universal shape of the WPMF profile obtained in coupled simulations allow a formulation of the one-dimensional theory of the WBL, and the carrying out of a detailed study of the WBL structure including the dependence of the drag coefficient on the wind speed. It is shown that a wide scatter of the experimental data on the drag coefficient can be explained, taking into account the age of waves. It is suggested that a reduction of the drag coefficient at high wind speeds can be qualitatively explained by the high-frequency wave suppression.
- Publication type
- Journal article
- Research centre
- Swinburne University of Technology. Faculty of Engineering and Industrial Sciences
- Boundary-Layer Meteorology, Vol. 138, no. 1 (Jan. 2011), pp. 1-41
- Publication year
- FOR Code(s)
- 0401 Atmospheric Sciences
- Boundary layers; Numerical modelling; Sea waves; Wind-wave interaction
- Publisher URL
- Copyright © Springer Science+Business Media B.V. 2010.
- Peer reviewed