Abstract The paper presents an analysis of the effect of collisions between coarse and fine particles in the vertical flow of a stream of fine particles suspended in gas on the exchange of momentum in these conditions. It was found that the phenomenon of double collisions of fine particles with the surface of coarse particles can be observed during the flow of a stream of fine particles suspended in gas around moving and stationary coarse particles. This phenomenon changes the nature of the relationship between the force of mutual interactions and mass flow rate of fine particles. The proposed corrective relationship significantly improved the consistency of the value of coarse particle terminal velocity depending on mass flow rate of fine particles suspended in the gas flowing around coarse particles. The range of importance of the relationships concerning the terminal velocity of coarse particles was determined.

中文翻译：

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细、粗颗粒碰撞对粗颗粒终端速度的影响

摘要 本文分析了悬浮在气体中的细颗粒流的垂直流动中粗颗粒和细颗粒之间的碰撞对这些条件下动量交换的影响。发现在悬浮在气体中的细颗粒流围绕移动和静止的粗颗粒流动期间，可以观察到细颗粒与粗颗粒表面的双重碰撞现象。这种现象改变了相互作用力与细颗粒质量流量之间关系的性质。所提出的校正关系显着提高了粗颗粒终端速度值的一致性，这取决于悬浮在粗颗粒周围流动的气体中的细颗粒的质量流量。