Inderscience Publishers

Roughness length parameterisation in urban boundary layers


In an attempt to develop an improved model for the wind-speed profile valid for urban boundary layers, the role played by the roughness length z
, i.e., the constant of integration of the vertical gradient of the wind speed, is extended. z
is assumed here as a ‘dynamic’ variable rather than as a ‘geometric’ parameter independent of the flow properties. On the basis of experiments conducted in a park located within the city of Rome and in the laboratory, it is found that in neutral conditions the ‘vertical’ profile of the roughness length shows a nearly exponential decrease with height.

Keywords: Monin-Obukhov similarity theory, MOST, similarity, boundary-layer, canopy layer, buildings, displacement height, inertial sublayer, ISL, urban heat island, roughness length, CEDVAL

Customer comments

No comments were found for Roughness length parameterisation in urban boundary layers. Be the first to comment!