Abstract In many applications involving nanoparticles, the question of controlling the properties of the films formed (particularly in terms of porosity) remains incomplete. These applications cover an extensive array of fields ranging from the manufacture of nanofilms to the prediction of the pressure drop of nanoparticle films formed on the surface of air purification filters. A review of the literature shows that the porosity of nanometric particle deposits has mainly been studied by numerical simulation. The few experimental studies conducted have focused on micron-sized particles or nanoparticle aggregates under limited operating conditions. The objective of this study is to confirm the porosity results of nanometric particle deposits obtained by the previous simulations and to correlate the porosity with relevant dimensionless numbers. The changes in porosity according to the various operating conditions confirm those obtained during the numerical simulations. All the experimental porosity values could be correlated to the Stokes number alone.

中文翻译：

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通过过滤形成的假球形纳米结构颗粒沉积物的孔隙率测量

摘要 在涉及纳米粒子的许多应用中，控制所形成薄膜的特性（特别是在孔隙率方面）的问题仍然不完整。这些应用涵盖了广泛的领域，从纳米薄膜的制造到空气净化过滤器表面形成的纳米颗粒薄膜的压降预测。文献综述表明，纳米颗粒沉积物的孔隙率主要通过数值模拟进行研究。进行的少数实验研究集中在有限操作条件下的微米级颗粒或纳米颗粒聚集体。本研究的目的是确认先前模拟获得的纳米颗粒沉积物的孔隙率结果，并将孔隙率与相关的无量纲数相关联。根据各种操作条件的孔隙率变化证实了在数值模拟过程中获得的那些变化。所有的实验孔隙率值都可以单独与斯托克斯数相关。