平行平板乱流場における水蒸気の不均一核生成とミスト成長の数値解析

概要

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In order to predict fog in an air-induced tunnel, heterogeneous nucleation and water-mist development in turbulent duct flows with cold bottom/top surfaces are numerically investigated. The distribution function of fine aerosol, considered as seeds of water-mist, and the Stokes force of rather large particles are taken into consideration regarding the particle diffusivity and the k-ε turbulent model as well as gravity precipitation. For a 2-dimensional duct of 2 m×360 m with air flow rate of 1.0 m/s, mist formation occurs mainly near the upper wall and water-mist develops up to 10μm in radius. In the mist regions of the tunnel deposition flux at the bottom surface is much larger than the vapor flux because of the contribution of precipitation. The effects of the distribution function of seeds and the Reynolds number are also discussed in detail.
一般社団法人日本機械学会の論文
1995-11-25