Dimensionless Parameters Characterizing Atmospheric Pollution in Valley

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  • 峡谷内大気汚染現象の拡散支配パラメータの検討
  • キョウコク ナイ タイキ オセン ゲンショウ ノ カクサン シハイ パラメータ ノ ケントウ

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In order to conduct the water tank experiment that resembles the Katmandu valley, the dominant dimensionless parameters of both the flow field and the dispersion field were extracted by the numerical simulation. The dimensionless parameters in both atmospheric stability and instability condition were defined by the ratio of the mountain height to the mixing height and to the inversion height, respectively. The water tank experiment based on these dimensionless parameters of the Katmandu valley agreed with the numerical simulation reasonably. This result suggested that these dimensionless parameters can be applicable for the flow and dispersion phenomenon in the valley.

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