填充床多分散性和变形对细颗粒传输的影响
Impacts of packed bed polydispersity and deformation on fine particle transport
AI总结：
本研究探讨了静态颗粒填充中孔隙喉道尺寸、多分散性和颗粒变形的关系，通过解析表达式和DEM模拟，证明了多分散性和变形对收缩尺寸及细颗粒传输的显著影响。
摘要：
静态颗粒填充在众多工业应用和自然环境中起着核心作用。在这些情况下，流体或细颗粒流经静态颗粒床的过程，受连接填充孔隙的最窄通道（通常称为孔隙喉道或收缩段）的极大影响。现有研究主要假设单分散刚性颗粒，但这过度简化了问题。在本研究中，我们阐明了孔隙喉道尺寸、多分散性和颗粒变形之间的联系。我们提供了简单的解析表达式来关联填充的这些属性，并通过离散元方法（DEM）细颗粒渗滤模拟示例，展示了多分散性和颗粒变形的影响。我们旨在强调多分散性和颗粒变形对收缩尺寸的显著影响，突显在颗粒填充传输中考虑这些效应的重要性。
英文摘要：
Static granular packings play a central role in numerous industrial applications and natural settings. In these situations, fluid or fine particle flow through a bed of static particles is heavily influenced by the narrowest passage connecting the pores of the packing, commonly referred to as pore throats or constrictions. Existing studies predominantly assume monodisperse rigid particles, but this is an oversimplification of the problem. In this work, we illustrate the connection between pore throat size, polydispersity, and particle deformation. Simple analytical expressions are provided to link these properties of the packing, followed by examples from Discrete Element Method (DEM) simulations of fine particle percolation demonstrating the impact of polydispersity and particle deformation. Our intent is to emphasize the substantial impact of polydispersity and particle deformation on constriction size, underscoring the importance of accounting for these effects in particle transport in granular packings.
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