Simultaneous observations were made of the fall velocity, size and mass of snowflakes in the steady falling state.It was found that the fall velocity depended upon both the size and the density of the flakes, but could not be represented as a function of their mass. An aerodynamic equation which expresses the fall velocity as a function of the density of a snowflake σ, was obtained ; u=330(σ-ρ)1/4 which agrees very well with the empirical data, where ρ is the density of air.
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机译:同时观察了稳定下落状态下雪花的下落速度,大小和质量,发现下落速度取决于薄片的大小和密度,但不能表示为雪花质量的函数。获得了一个空气动力学方程,该方程将落下速度表示为雪花的密度σ的函数; u = 330(σ-ρ)1/4与经验数据非常吻合,其中ρ是空气的密度。
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