Abstract The horizontally inhomogeneous distribution of a heavy admixture in a fluid (gaseous) medium in the field of gravity means the presence of a horizontal component of the pressure gradient force and the appearance of a density current. In the ocean, such currents are sometimes catastrophic; in the atmosphere, they can be significant, for example, in connection with some episodes of atmospheric pollution, precipitation, dust storms, and surface snowstorms. In this work, a linear stationary analytical model that makes it possible to reveal some general patterns of density currents with a heavy admixture settling above a horizontal surface is investigated. The amplitude of the occurring currents depends most strongly on the sedimentation velocity of the particles and the diffusion coefficient of the admixture.

中文翻译：

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重外加剂沉降过程中产生的密度流的分析模型

摘要 在重力场中流体（气态）介质中重混合物的水平不均匀分布意味着压力梯度力的水平分量的存在和密度流的出现。在海洋中，这种洋流有时是灾难性的；在大气中，它们可能很重要，例如，与某些大气污染、降水、沙尘暴和地表暴风雪有关。在这项工作中，研究了一种线性平稳分析模型，该模型可以揭示密度电流的一些一般模式，其中重混合物沉降在水平表面上方。发生电流的幅度最强烈地取决于颗粒的沉降速度和混合物的扩散系数。