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A moving grid finite-element model of the bulk properties of the atmospheric boundary layer

✍ Scribed by R. D. Russell; E. S. Takle

Publisher
Springer
Year
1989
Tongue
English
Weight
908 KB
Volume
46
Category
Article
ISSN
0006-8314

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✦ Synopsis

A moving-grid finite-element model has been developed to model numerically the vertically integrated properties of the atmospheric boundary layer (ABL) in one dimension. The model equations for mean wind velocity and potential temperature are combined with a surface energy budget and predictive equations for boundary-layer height to simulate both stable and unstable ABLs. The nodal position defining the top of the boundary layer is one of the model unknowns and is determined by boundary-layer dynamics. The finite-element method, being an integral method, has advantages of accurate representation of both bulk values and their vertical derivatives, the latter being essential properties of the nocturnal boundary layer. Compared with observations and results of other models, the present model predicts bulk properties very well while retaining a simple and economical form.

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