  The construction of a building inevitably changes the microclimate in its
vicinity. Many city authorities request comprehensive wind studies before
granting a building permit, which can be obtained by Computational Fluid
Dynamics (CFD) simulations. When performing wind simulations, the quality of
the geometry model is essential. Still, no available studies examine different
geometry inputs' impact on the wind flow through an urban environment. This
study investigates the influence of the building geometry acquisition method on
the simulated wind field in an urban area, focusing on the application of
pedestrian wind comfort. A suburban area in the west coast of Norway was chosen
as a case study. Four building model types were produced and used in the
simulations for comparison. The simulations using a building model produced
from data stored in the national general feature catalog (FKB) in Norway showed
minor differences to the simulations using more detailed and accurate models
based on remote sensing measurements. Prominent variations were seen using a
model based on the extrusion of the building footprint. A greater understanding
of the geometry acquisition method's influence may enable more efficient
pedestrian wind comfort studies that recognize the uncertainty of different
geometric model use in urban wind simulations.
