Abstract
In this chapter, an assessment was carried out on aerodynamic boundary surface layer characterization, where vertical vector fluxes of scalar quantities, e.g., momentum or sensible heat, are considered constant. This approach is grounded on the Prandtl mixed layer empirical theory based on the analogy between eddies in turbulent flow and molecules in laminar flow, allowing for flux-gradient assumptions. The similitudes between eddy and turbulent diffusivity coefficients in turbulent and laminar molecular flows were noted here as well as their differences in meaning. It has been shown that within the surface layer, this theory is not strictly applicable in very rough canopies such as forests, since vertical fluxes in these canopies are directed in the opposite direction to the gradients.
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Rodrigues, A., Sardinha, R.A., Pita, G. (2021). Aerodynamic Characterization of the Surface Layer. In: Fundamental Principles of Environmental Physics. Springer, Cham. https://doi.org/10.1007/978-3-030-69025-0_2
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DOI: https://doi.org/10.1007/978-3-030-69025-0_2
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