论文标题
载有颗粒膜在管的内壁上的沉积
Deposition of a particle-laden film on the inner wall of a tube
论文作者
论文摘要
在毛细管中的液体或在毛细管中的液体sl液的转换导致薄膜在内壁上的沉积。当液体中存在颗粒或污染物时，如果液膜足够厚，它们会沉积并污染管子。在本文中，我们通过实验研究了在空气侵袭期间沉积颗粒的条件，最初装有稀悬液。我们表明，膜中颗粒的夹带受颗粒与管半径的比率以及与前速度相关的毛细管数的控制。我们还开发了一个模型，该模型建议最佳的操作条件，以避免在悬挂悬挂期间撤离期间污染。通过控制通道内壁上颗粒的沉积，该沉积机制也可以在涂层过程中利用。
The withdrawal of a liquid or the translation of a liquid slug in a capillary tube leads to the deposition of a thin film on the inner wall. When particles or contaminants are present in the liquid, they deposit and contaminate the tube if the liquid film is sufficiently thick. In this article, we experimentally investigate the condition under which particles are deposited during the air invasion in a capillary tube initially filled with a dilute suspension. We show that the entrainment of particles in the film is controlled by the ratio of the particle and the tube radii and the capillary number associated with the front velocity. We also develop a model which suggests optimal operating conditions to avoid contamination during withdrawal of a suspension. This deposition mechanism can also be leveraged in coating processes by controlling the deposition of particles on the inner walls of channels.
