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Boundary layer flow over gentle curvilinear topography with a sudden change in surface roughness
Author(s) -
Lo A. K.,
McBean G. A.
Publication year - 1977
Publication title -
quarterly journal of the royal meteorological society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.744
H-Index - 143
eISSN - 1477-870X
pISSN - 0035-9009
DOI - 10.1002/qj.49710343514
Subject(s) - curvilinear coordinates , elevation (ballistics) , boundary layer , geology , displacement (psychology) , flow (mathematics) , surface finish , geometry , boundary (topology) , mechanics , geodesy , mathematics , physics , materials science , mathematical analysis , psychology , composite material , psychotherapist
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 produce vertical wind speeds that reach a maximum value of about 25 % of the horizontal component. It is found that perturbations due to a smooth‐to‐rough transition together with an increase of elevation are stronger than those generated from a rough‐to‐smooth transition with a decrease of elevation.