Mixed Spectral-Integration Model for Neutral Mean Wind Flow Over Hills

A linear model for neutral surface-layer flow over orography is presented. The Reynolds-Averaged Navier-Stokes and E- [graphic removed] turbulence closure equations are expressed in a terrain-following coordinate system created from a simple analytical expression in the Fourier domain. The perturbat...

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Bibliographic Details
Published in:Boundary-layer meteorology 2008-08, Vol.128 (2), p.229-254
Main Authors: Corbett, Jean-François, Ott, Søren, Landberg, Lars
Format: Article
Language:English
Subjects:
Atmospheric Protection/Air Quality Control/Air Pollution
Atmospheric Sciences
Complex terrain
Convection, turbulence, diffusion. Boundary layer structure and dynamics
Coordinate transformations
Earth and Environmental Science
Earth Sciences
Earth, ocean, space
Energy industry
Exact sciences and technology
External geophysics
Geophysics. Techniques, methods, instrumentation and models
Meteorology
Mixed spectral-integration
Ordinary differential equations
Original Paper
Orography
Turbulence models
Velocity
Wind
Wind-flow model
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Summary:A linear model for neutral surface-layer flow over orography is presented. The Reynolds-Averaged Navier-Stokes and E- [graphic removed] turbulence closure equations are expressed in a terrain-following coordinate system created from a simple analytical expression in the Fourier domain. The perturbation equations are solved spectrally horizontally and by numerical integration vertically. Non-dimensional solutions are stored in look-up tables for quick re-use. Model results are compared to measurements, as well as other authors' flow models in three test cases. The model is implemented and tested in two-dimensional space; the equations for a full three-dimensional version are presented.
ISSN:0006-8314
1573-1472
DOI:10.1007/s10546-008-9284-z