Realistic boundary conditions for the simulation of atmospheric boundary layer flows using an improved k-epsilon model

摘要

Atmospheric flow simulations in engineering practice - such as simulations of pollutant dispersion, wind load on buildings, wind climate of urban areas - are fairly sensitive to the inlet boundary conditions. The objective of the present paper is to introduce suitable profiles for velocity and turbulent quantities, which do not only fit the measured vertical distributions, but also guarantee the overall consistency of the turbulence model. If the latter aspect is not verified, the inlet profiles deteriorate rapidly within the computational domain, leading to unrealistic wind profiles in the area of interest.