Wind tunnel model tests of snow drifting on a two-level flat roof

摘要: Abstract Consistent similarity of the flow regime and behaviour individual snow particles is difficult to achieve at a reduced geometric scale. As result, model studies drifting accumulation invariably require relaxation some parameters. This paper examines drift formation on lower level large-area two-level roof different wind speeds in two approach terrains. In relatively rough terrains, effective surface shear stress determined primarily by collective drag various buildings loss horizontal momentum during saltation less significant. such situations both deposition strongly influenced overall aerodynamics building shape its surroundings.