Micro-Modeling of Cohesive Mixing Processes

摘要CTS-0105688J。匹兹堡大学麦卡锡在三种粒子级凝聚力来源的背景下考虑粘性颗粒材料的混合或分离：液桥(毛细)形成、范德沃尔斯力或静电相互作用。粒子动力学模拟的方法，已经在自由流动的粉末(无凝聚力)的简单情况下进行了测试，将被用来建立由这些微观凝聚力效应引起的宏观流动。在其他结果中，它将产生简单颗粒流中混合或分离的预测。特别注意“液桥”(或间隙)建模，它包括表面张力、压力和粘性力，以及所涉及的表面的粗糙度。

AbstractCTS-0105688J. McCarthy, University of PittsburghThe mixing or segregation of cohesive granular materials is considered in the context of three particle-level sources of cohesion: liquid bridge (capillary) formation, Van der Wals forces, or electrostatic interaction. The method of Particle Dynamic Simulation, already tested in the simple case of free-flowing powders (no cohesion), will be used to establish the macroscopic flows which are induced by these microscopic cohesion effects. Among other results, it will yield the prediciton of mixing or separation in simple granular flows. Special attention is given to the "liquid bridge" (or interstitial) modeling, which includes surface tension, pressure and viscous forces, and the roughness of the surfaces involved.