I-67 CFDによる市街地の風通しと空気汚染の予測精度の検討(その1) : 高層建物背後の乱流拡散場に関する風洞実験、LES、Durbin型κ-εモデルの比較

概要

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Flow and diffusion fields around a building were predicted by LES and Durbin type κ-ε model. The accuracy of both models was assessed by comparing their results with those obtained by wind tunnel tests. The results of LES showed good agreement with experimental data for mean wind velocity, turbulence statistics, mean gas concentration and power spectra of fluctuations of velocity and concentration, while significant differences were noted for the Durbin type κ-ε model concerning the flow and diffusion fields in the wake region behind the building. The differences were due to the fact that the periodic motions caused by vortex shedding were not reproduced by this model.
社団法人空気調和・衛生工学会の論文
2007-08-24