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Change of surface roughness and the planetary boundary layer

✍ Scribed by Niels Otto Jensen

Publisher
John Wiley and Sons
Year
1978
Tongue
English
Weight
339 KB
Volume
104
Category
Article
ISSN
0035-9009

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✦ Synopsis

Abstract

The ratio between upstream and far downstream surface friction velocities relative to a change in surface roughness is given on the basis of results from surface Rossby number similarity theory. By simple theories for the internal boundary layer, which are found here to compare quite well with recent numerical results from higher‐order closure models, it is found that even at a downwind distance such that the internal boundary layer has grown to the full height of the planetary boundary layer, the surface stress still considerably exceeds the equilibrium value.

πŸ“œ SIMILAR VOLUMES

Internal boundary layer growth following
Internal boundary layer growth following a step change in surface roughness
✍ D. H. Wood πŸ“‚ Article πŸ“… 1982 πŸ› Springer 🌐 English βš– 224 KB

The testing of a simple correlation for the height of the internal layer, found from dimensional analysis, is described. It is shown that the internal layer is controlled by the larger of the upstream and downstream roughness length scales.

Boundary layer flow over gentle curvilin
Boundary layer flow over gentle curvilinear topography with a sudden change in surface roughness
✍ A. K. Lo; Dr G. A. McBean πŸ“‚ Article πŸ“… 1977 πŸ› John Wiley and Sons 🌐 English βš– 453 KB

## Abstract A new approach using a curvilinear coordinate system that enables incorporation of a change of roughness with a zero‐plane displacement or elevation change in a boundary‐layer model is presented. the effect of topography together with the rapid development of an internal boundary layer