乱流境界層中の低層構造物まわりの流れのLES : 風圧力特性の再現性

概要

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This paper discusses the applicability of large eddy simulation (LES) of the flows around a low-rise building in a turbulent boundary layer. The time-dependent turbulent inflow data was generated by means of the numerical technique, which directly simulates a spatially developing boundary layer using periodic boundary condition. A flow around the building placed in a turbulent boundary layer developed on a flat plate, was compared with that in a laminar boundary layer. It has been clarified that the difference of time-averaged pressure distributions between the two inflows comes from the deformation of separation bubble due to the turbulence of the approaching flow. The pressure distribution on a building in a turbulent boundary layer, whose wind profile sets to the power law with exponent α = 0.25, was compared with wind tunnel test data, and has good agreement in quality but not enough in quantity.
社団法人日本建築学会の論文
2000-04-30